Tesla Roadster Sport 2.5
|Also called||Code name: DarkStar|
|Assembly||Hethel, Norfolk, England
Menlo Park, California, USA
|Body and chassis|
|Body style||2-door Roadster|
|Layout||Rear mid-engine, rear-wheel drive|
|Electric motor||1.5, 2.0 : 248 hp (185 kW), 200·lb·ft/s (270 N·m), 3-phase 4-pole;
2.5 Non-Sport : 288 hp (215 kW), 273·lb·ft (370 N·m), 3-phase 4-pole;
2.5 Sport : 288 hp (215 kW), 295·lb·ft (400 N·m), 3-phase 4-pole
AC induction motor
|Transmission||Single speed BorgWarner fixed gear (8.27:1 ratio)|
|Battery||53 kWh (Lithium-ion battery at the pack level: 117 Wh/kg and 37 Wh/L)|
|Electric range||244 mi (393 km) using EPA combined cycle|
|Plug-in charging||proprietary inlet, 16.8 kW (70 A 240 V) with HPWC outlet and with the SAE J1772-2009 adapter, adapters for domestic AC sockets|
|Wheelbase||2,352 mm (92.6 in)|
|Length||3,946 mm (155.4 in)|
|Width||1,873 mm (73.7 in)|
|Height||1,127 mm (44.4 in)|
|Curb weight||2,723 lb (1,235 kg)|
The Tesla Roadster is a battery electric vehicle (BEV) sports car produced by the electric car firm Tesla Motors in California between 2008 and 2012. The Roadster was the first highway-capable all-electric vehicle in serial production for sale in the United States in recent times.
Since 2008 Tesla had sold more than 2,400 Roadsters in 31 countries through September 2012, and most of the remaining Tesla Roadsters were sold in Europe and Asia during the fourth quarter of 2012. Tesla began producing right-hand-drive Roadsters in early 2010. The Roadster had a 2010 base price of US$109,000 in the United States, GB£86,950 in the United Kingdom, A$191,888 in Australia, and €84,000 in continental Europe. As an electric vehicle, the Roadster qualified for several government incentives in many nations.
The Roadster was the first production automobile to use lithium-ion battery cells and the first production BEV (all-electric) to travel more than 200 miles (320 km) per charge. The world distance record of 501 km (311 mi) for a production electric car on a single charge was set by a Roadster on October 27, 2009, during the Global Green Challenge in outback Australia, in which it averaged a speed of 25 mph (40 km/h). In March 2010, a Tesla Roadster became the first electric vehicle to win the Monte Carlo Alternative Energy Rally and the first to win any Federation Internationale de l'Automobile-sanctioned championship when a Roadster driven by former Formula One driver Érik Comas beat 96 competitors for range, efficiency and performance in the three-day, nearly 1,000-kilometer (620 mi) challenge.
According to the U.S. EPA, the Roadster can travel 244 miles (393 km) on a single charge of its lithium-ion battery pack, and can accelerate from 0 to 60 mph (0 to 97 km/h) in 3.7 or 3.9 seconds depending on the model. The Roadster's efficiency, as of September 2008[update], was reported as 120 mpgge (2.0 L/100 km). It uses 135 Wh/km (21.7 kW·h/100 mi, 13.5 kW·h/100 km or 490 kJ/km) battery-to-wheel, and has an efficiency of 88% on average.
- 1 History
- 2 Development
- 3 Production
- 4 Sales
- 5 Service
- 6 Specifications
- 7 Energy efficiency
- 8 Reviews
- 9 Awards
- 10 See also
- 11 Notes
- 12 References
- 13 External links
The San Francisco International Auto Show, held on November 18–26, 2006, was the Tesla Roadster's first auto show. Tesla Roadsters have been featured in numerous subsequent auto shows, including international shows in Los Angeles, Detroit and Frankfurt.
The first Tesla Roadster was delivered in February 2008 to Tesla co-founder, chairman and product architect Elon Musk. The company produced 500 similar vehicles through June 2009. In July 2009, Tesla began production of its 2010 model-year Roadster—the first major product upgrade since Tesla began production in 2008. Simultaneously, Tesla began producing the Roadster Sport, the first derivative of Tesla's proprietary, patented powertrain. The car accelerates from 0 to 60 mph (0 to 97 km/h) in 3.7 seconds, compared to 3.9 seconds for the standard Roadster. Changes for the 2010 model-year cars include:
- An upgraded interior and push-button gear selector, including "executive interior" of exposed carbon fiber and premium leather, and clear-coat carbon fiber body accents.
- Locking, push-button glove box wrapped in leather.
- A centrally mounted video display screen to monitor real-time data, including estimated range, power regenerated, and the number of barrels of oil saved. This convenient screen is visible to the driver and passenger.
- Adjustable, custom-tuned suspension. The shock absorbers' response and anti-sway bars are manually adjustable.
- More powerful and immediate heating, ventilation and air-conditioning.
- More efficient motor and hand-wound stator. The new motor generates more kilowatts per amp—more mechanical power—than the predecessor.
- A suite of sound-deadening measures to dramatically reduce noise, vibration and harshness. For instance, engineers added pellets to a member of the chassis side rail. These pellets expand by 50 times original volume during the adhesive heating cycle to eliminate rattles.
All of these features, except for the motor were available either as standard or as add-on option for the non-sport model.
Beginning mid-March 2010, Tesla Motors, in an effort to show off the practicality of its electric cars, sent one of its Roadsters around the world. Starting at the Geneva auto show, the Roadster completed its journey upon its arrival in Paris on September 28, 2010.
In July 2010, Tesla introduced the "Roadster 2.5", the latest update of the Roadster. New features in Roadster 2.5 include:
- A new look, which includes a new front fascia with diffusing vents, and rear diffuser reflecting the future of Tesla design
- Directional forged wheels available in both silver and black
- New seats with improved comfort, larger more supportive bolsters and a new lumbar support system
- Power control hardware that enables spirited driving in exceptionally hot climates
- An optional 7" touchscreen display with back-up camera
- Improved interior sound reduction including new front fender liner material make the cabin quieter
The Roadster was the most expensive single prize ever offered to date on The Price Is Right, in a playing of Golden Road on April 22, 2010, in celebration of Earth Day. It was not won—according to the show, its price was US$112,845.
Tesla produced the Roadster until January 2012, when its supply of Lotus Elise gliders ran out, as its contract with Lotus Cars for 2,500 gliders expired at the end of 2011. Tesla stopped taking orders for the Roadster in the U.S. market in August 2011. The next generation is expected to be introduced by 2018 and will not be based on the Lotus gliders but instead on a shortened version of the architecture developed for the Tesla Model S. Featuring new options and enhanced components, the 2012 Tesla Roadster is being sold in limited numbers only in Europe, Asia and Australia. Tesla's U.S. exemption for not having special two-stage passenger airbags expired for cars made after the end of 2011 so the last Roadsters could not be sold in the American market. Also a total of 15 Final Edition Roadsters were produced to close the manufacturing cycle of Tesla's first electric car. As of June 2012[update] the Roadster remained on sale in Europe and Asia and as of December 2012[update], inventories were not yet depleted.[dated info]
The Roadster was developed by Tesla Motors to mass-produce AC Propulsion's tzero concept car. The production idea was conceived by Martin Eberhard and Marc Tarpenning who incorporated Tesla Motors in Delaware on July 1, 2003, to pursue the idea commercially. South African-born entrepreneur Elon Musk took an active role within the company starting in 2004, including investing US$7.5 million, overseeing Roadster product design from the beginning, and greatly expanding Tesla's long-term strategic sales goals to include developing mainstream vehicles after the sports car. Musk became Tesla's Chairman of the Board in April 2004 and had helped recruit JB Straubel as chief technology officer in March 2004. Musk received the Global Green 2006 product design award for the design of the Tesla Roadster, presented by Mikhail Gorbachev, and he received the 2007 Index Design award for the design of the Tesla Roadster.
Before Tesla had developed the Roadster's proprietary powertrain, the company licensed AC Propulsion's EV Power System design and Reductive Charging patent which covers integration of the charging electronics with the inverter, thus reducing mass, complexity, and cost. Tesla then designed and built its own power electronics, motor, and other drivetrain components that incorporated this licensed technology from AC Propulsion. Given the extensive redevelopment of the vehicle, Tesla Motors no longer licenses any proprietary technology from AC Propulsion. The Roadster's powertrain is unique.
On 11 July 2005, Tesla and British sports car maker Lotus entered an agreement about products and services based on the Lotus Elise, where Lotus provided advice on designing and developing a vehicle as well as producing partly assembled vehicles, and amended in 2009. helped with basic chassis development. The Roadster has a parts overlap of roughly 6 percent with the Lotus Elise. Tesla's designers chose to construct the body panels using resin transfer molded carbon fiber composite to minimize weight; this choice makes the Roadster one of the least expensive cars with an entirely carbon fiber skin.
Several prototypes of the Tesla Roadster were produced from 2004 through 2007. Initial studies were done in two "test mule" vehicles based on Lotus Elises equipped with all-electric drive systems. Ten Engineering Prototypes (EP1 through EP10) which led to many minor changes were then built and tested in late 2006 and early 2007. Tesla then produced at least 26 Validation Prototypes (VP1 through VP26) which were delivered beginning in March 2007. These final revisions were endurance and crash tested in preparation for series production.
In August 2007, Martin Eberhard was replaced by an interim CEO, Michael Marks. Marks accepted the temporary position while a recruitment was undertaken. In December 2007, Ze'ev Drori became the CEO and President of Tesla Motors. In October 2008, Musk succeeded Ze'ev Drori as CEO. Drori became Vice Chairman and left the company in December. In January 2008, the U.S. National Highway Traffic Safety Administration (NHTSA) announced that it would grant a waiver of the advanced air bag rule noting that the Tesla Roadster already includes standard air bags; similar waivers have been granted to many other small volume manufacturers as well, including Lotus, Ferrari, and Bugatti. Tesla delivered its first production car in February 2008 to Musk.
Tesla announced in early August 2009 that Roadster sales had resulted in overall corporate profitability for the month of July 2009. The company said it earned approximately US$1 million on revenue of US$20 million. Profitability arose primarily from improved gross margin on the 2010 Roadster, the second iteration of Tesla’s award-winning sports car. Tesla, which like all automakers records revenue when products are delivered, shipped a record 109 vehicles in July and reported a surge in new Roadster purchases.
Tesla, which signed a production contract with Group Lotus in 2007 to produce "gliders" (complete cars minus electric powertrain) for the Roadster, announced in early 2010 that Roadster production would continue until early 2012, in part due to tooling changes[clarification needed] at Lotus' assembly plant in the UK.
Tesla cumulative production of the Roadster reached 1,000 cars in January 2010. The Roadster is an American car with a Vehicle Identification Number common to all cars considered American manufactured, but it has parts from around the world. The body panels come from French supplier Sotira. These are sent from France to Hethel, U.K., where Tesla contracts with Lotus to build the Roadster's unique chassis. The Roadster shares roughly 6 percent of its components with the Lotus Elise; shared components include the windshield, air bags, some tires, some dashboard parts, and suspension components. The Roadster's single-speed gearbox is made in Detroit to Tesla's specifications by Auburn Hills, Michigan-based supplier BorgWarner. Brakes and airbags are made by Siemens in Germany, and some crash testing was conducted at Siemens as well.
For Roadsters bound for customers in North America, the chassis is then sent to Menlo Park, California, for final assembly. For Roadsters bound for customers in Europe or elsewhere outside of North America, the chassis is sent to a facility near Hethel, U.K., for final assembly. At these final assembly locations, Tesla employees install the entire powertrain, which consists of the battery pack, power electronics module, gearbox and motor. Tesla also performs rigorous "pre-delivery inspection" on every car before customers take ownership.
Subsequent to completion of production car number one at Hethel, the company announced problems with transmission reliability. The development transmission, with first gear enabled to accelerate 0 to 60 mph (0 to 97 km/h) in 4 seconds, was reported to have a life expectancy of as low as only a few thousand miles. Tesla Motors' first two transmission suppliers were unable to produce transmissions, in quantity, that could withstand the gear-shift requirements of the high torque, high rpm electric motor. In December 2007, Tesla Motors announced plans to ship the initial Roadsters with the transmissions locked into second gear to provide 0 to 60 mph (0 to 97 km/h) acceleration in 5.7 seconds. The first production car was not delivered with this interim solution; P1 has both transmission gears enabled. According to the plan, the initial transmissions were to be swapped out under warranty when the finalized transmission, power electronics module (PEM), and cooling system became available. The EPA range of the car was also restated downward from 245 to 221 miles (394 to 356 km). The downward revision was attributed to an error in equipment calibration at the laboratory that conducted the original test.
- During the first two months of production, Tesla produced a total of three Roadsters (P3/VINF002, P4/VINF004, and P5/VINF005). Production car # 1 (P1) and P2 were built prior to the start of regular series production, which began March 17, 2008.
- By September 10, 2008, Tesla had delivered 27 of the cars to customers. It was also reported that a newer, better transmission had been developed and that production of the car was hoped to reach 20 per week by December 2008, and 40 per week by March 2009. Over the next 20 days, however, only 3 more cars had been delivered to customers which brought the total to 30 as of September 30, 2008.
- By November 19, 2008, more than 70 of the cars had been delivered to customers.
- By December 9, 2008, the 100th car had been delivered to its customer.
- By February 11, 2009, 200 Roadsters had been produced.
- By April 2, 2009, 320 Roadsters had been delivered.
- In May 2009, Tesla issued a safety recall for all 345 of its Roadsters that were manufactured before April 22, 2009. Tesla sent technicians to customers' homes to tighten the rear, inner hub flange bolts. Tesla Motors told customers that without this adjustment, the driver could lose control of the car and crash. The problem originated at the Lotus assembly line that builds the Roadster and Lotus is also recalling some of its own vehicles. Tesla reminded customers that millions of cars are recalled every year.
- By the end of May 2009, the 500th Roadster had been delivered.
- Tesla made its first profit ever in July 2009, when it shipped 109 vehicles, the most ever so far for a single month.
- By September 15, 2009, 700 Roadsters had been delivered.
- Tesla announced on January 13, 2010, that it had produced its 1,000th Roadster. The company has delivered vehicles to customers in 43 states and 21 countries worldwide. In 2009 Tesla began taking orders from customers in Canada, and Canadian deliveries began in February 2010.
- In January 2010, Tesla began producing its first right-hand-drive Roadsters for the UK and Ireland. The 2010 model-year right-hand-drive Roadster includes a suite of unique noise-reduction materials and an upgraded sound system. The Roadster starts at £86,950 and costs about 1.5p per mile.
- On 29 January 2010, in a Form S-1 filing of its preliminary prospectus with the U.S. Securities and Exchange Commission, the company stated that it would halt production of the Roadster in 2011 and replace it with a new model which would not be introduced until 2013 at the earliest: "...we do not plan to sell our current generation Tesla Roadster after 2011 due to planned tooling changes at a supplier for the Tesla Roadster, and we do not currently plan to begin selling our next generation Tesla Roadster until at least one year after the launch of the Model S, which is not expected to be in production until 2012"...[dated info]
- On 16 March 2010, Tesla Motors announced that it had "negotiated agreements with key suppliers that will increase total Roadster production by 40 percent and extend sales into 2012", also indicating that it would expand into the Asian and Australian markets by 2011.
- On 2 December 2010, Tesla had delivered more than 1400 Roadsters.
- On 28 September 2011, Tesla delivered its 100th Roadster in Switzerland.
- Production ended in January 2012 and no longer available for sale the U.S. after December 2011.
- More than 2,418 units were sold worldwide through September 2012. The remaining cars were available for sale only in Europe and Asia.
- Most of the remaining Tesla Roadsters were sold during the fourth quarter of 2012.[dated info]
Special final edition
Tesla produced a special edition of 15 Final Edition Roadsters to close the production cycle of the electric car. The 15 special edition cars will be sold in each of the three sales regions, North America, Europe and Asia, and five units will be allocated to each. The Final Edition Roadster does not have any performance modifications, but features sporting atomic red paint, a duo of dark silver stripes on its hood and rear clamshell, and exclusive anthracite aluminum wheels.
Since 2008 Tesla sold more than 2,400 units worldwide through September 2012. Featuring new options and enhanced features, the 2012 Tesla Roadster was sold in limited numbers only in Europe, Asia and Australia, and as of July 2012, less than 140 units were available for sale in Europe and Asia before the remaining inventory would be sold out. Tesla's U.S. exemption for not having special two-stage passenger airbags expired for cars made after the end of 2011 so the last Roadsters were not sold in the American market due to regulatory reasons.[dated info]
The base price for the 2010 models, which began shipping to customers in July 2009, was US$109,000. The Roadster has a bumper-to-bumper 3-year, 36,000-mile (58,000 km) warranty. Tesla also offers an extended powertrain warranty and a battery replacement warranty. Options ranging from colors to audio to high-power connectors for faster charging will increase the price.
In July 2009, Tesla announced that US consumers could finance the Roadster through Bank of America. Financing is available for up to 75 percent of the total vehicle purchase price. A customer approved for a 5-year financing term on a base Roadster could put down as little as US$20,000 before taxes and net of the US federal tax credit. The monthly payment would be approximately US$1,700 at a 5 percent annual percentage rate (APR). That monthly payment is typical for high performance, although the Roadster costs roughly US$4 to refuel and does not require traditional automotive maintenance, like fluid, belt, and spark plug changes. Unlike internal combustion engines, Teslas get a 100 percent waiver on sales, luxury and use taxes in at least four states, and they qualify for commuter lane privileges, free parking and free charging in many regions.
Tesla sells Roadsters directly to customers. It sells online, in 13 showrooms and over toll-free phone lines in North America and Europe. Tesla does not operate through franchise dealerships but operates company-owned stores. The company has said that it takes its retail cues from Apple, Starbucks and other non-automotive retailers.
Outside the United States
The company has been shipping cars to European customers since mid-2009. Tesla sold out of its EU special-edition vehicle, which had a 2010 model-year production run of 250 cars, with a base price of €99,000. A total of 575 units have been sold in Europe through October 2012.
Tesla opened a showroom in London, its first outside the US, on June 25, 2009, and announced at the same time that it would start building right-hand-drive models from early 2010. Tesla opened a store in Munich in September 2009 and a store in Monaco in November 2009. It opened stores in Zurich and Copenhagen in the summer of 2010 and in Milan in February 2011. Reservations for the 2010 Roadster were available for a €3,000 refundable reservation fee.
As of 8 May 2012[update], Hansjoerg von Gemmingen of Karlsruhe / Germany drove his Tesla Roadster 205,711 kilometers (127,823 miles) in four years, this being the mileage world record for all-electric vehicles.
Kevin Yu, the director of Tesla Motors Asia Pacific, said that Roadsters are sold in Japanese showrooms at an average price between ¥12.8 million and ¥20 million.
Whereas vehicles with internal combustion engines require more frequent service for oil changes and routine maintenance on engine components and other related systems, Tesla's website recommends the owner bring the vehicle in for service "once a year or every 12,000 miles". For other concerns with Tesla's all-electric powertrain, Tesla has created a "mobile service unit" that dispatches company-trained technicians to customers' homes or offices in case the owner is experiencing problems. Tesla charges the customer according to the distance the service unit needs to travel: one US dollar per mile roundtrip with a 100 dollar minimum. Technicians drive company vans equipped with numerous tools and testing equipment to do "in the field" repairs, enhancements and software upgrades. Tesla debuted its "house call" approach in the spring of 2009, when the company announced a recall due to a manufacturing problem in the Lotus assembly plant, which also affected the Lotus Elise and other models from the British sports car maker.
The first Tesla Motors service center, in Los Angeles, California, was opened on Santa Monica Boulevard on May 1, 2008. Tesla Motors publicly opened their second showroom and service area in Menlo Park, California on July 22, 2008. The Menlo Park location is also the final assembly area for Tesla Roadsters. Tesla also operates service centers in New York City, Miami, Chicago, and Seattle.
Tesla plans to build additional service centers over the next few years to support sales of its next vehicle, the Model S sports sedan. Planning is underway for an additional 15 service centers in United States major metropolitan locations. Possible locations for sales and service locations in Europe were announced in a letter to customers in May 2008.
The roadster is powered by an electric motor, a 3-phase, 4-pole induction motor, producing a maximum net power of 248 hp (185 kW). Maximum torque is 200·lb·ft (270 N·m), obtained at 0 rpm and almost constant up to 6,000 rpm, a common feature of electric motors and one of the biggest differences (from the performance point of view) with internal combustion engines. The motor is air-cooled and does not need a liquid cooling system.
The Sport Model introduced during the 2009 Detroit Auto Show includes a motor with a higher density, hand-wound stator that produces a maximum of 288 hp (215 kW). Both motors are designed for rotational speeds of up to 14,000 rpm, and the regular motor delivers a typical efficiency of 88% or 90%; 80% at peak power. It weighs less than 70 pounds (32 kg).
Starting in September 2008 Tesla Motors selected BorgWarner to manufacture gearboxes and began equipping all Roadsters with a single speed, fixed gear gearbox (8.2752:1) with an electrically actuated parking pawl mechanism and a mechanical lubrication pump.
The company previously worked with several companies, including XTrac and Magna International, to find the right automatic transmission, but a two-gear solution proved to be too challenging. This led to substantial delays in production. At the "Town Hall Meeting" with owners in December 2007, Tesla announced plans to ship the initial 2008 Roadsters with their interim Magna two-speed direct shift manual transmissions locked into second gear, limiting the performance of the car to less than what was originally stated (0 to 60 mph (0 to 97 km/h) in 5.7 seconds instead of the announced 4.0 seconds). Tesla also announced it would upgrade those transmissions under warranty when the final transmission became available. At the "Town Hall Meeting" with owners on January 30, 2008, Tesla Motors described the planned transmission upgrade as a single-speed gearbox with a drive ratio of 8.27:1 combined with improved electronics and motor cooling that retain the acceleration from 0 to 60 mph (0 to 97 km/h) in under 4 seconds and an improved motor limit of 14,000 rpm to retain the 125 mph (201 km/h) top speed. The upgraded system also improved the maximum torque from 200 to 280 lb·ft (270 to 380 N·m) and improves the Roadster's quarter mile times.
In the interior the gear selector is similar to a push-button automatic with buttons labeled P, R, N and D while some earlier models have a gear lever similar to that in cars with manual transmission.
The Roadster's 0 to 60 mph (0 to 97 km/h) acceleration time is 3.9 seconds for the Standard Model and 3.7 seconds for the 2010 Sport Model. MotorTrend, which performed the first independent instrumented testing of the Roadster Sport, confirmed the company's reported 0 to 60 mph (0 to 97 km/h) time of 3.7 seconds. MotorTrend recorded 0 to 60 mph (0 to 97 km/h) of 3.70 seconds; it recorded a 1⁄4-mile (0.40 km) test at 12.6 sec giving 102.6 mph (165.1 km/h). The top speed is electronically limited to 125 mph (201 km/h). The Roadster covers the 1⁄4-mile (0.40 km) dragstrip in 12.757 seconds at 104.74 mph (168.56 km/h). It weighs about 2,700 lb (1,200 kg) and is rear wheel drive; most of the car's weight is centered in front of the rear axle. Its body style and smooth underbody result in a Cd of 0.35.
Tesla began delivering the higher performance Sport version of the Roadster in July 2009. The Roadster Sport has adjustable dampers and a new hand-wound motor, capable of 0 to 60 mph (0 to 97 km/h) in 3.7 seconds. Scotty Pollacheck, a high-performance driver for Killacycle, drove a 2010 Tesla Roadster Sport at the Wayland Invitational Drag Race in Portland, Ore., in July 2009. He did a quarter-mile (~400 m) in dry conditions in 12.643 seconds, setting a new record in the National Electric Drag Racing Association among the SP/A3 class of vehicles. The EPA combined range (specifying distance traveled between charges) measured in February 2008 for early production Roadsters was 231 mi (372 km) city, 224 mi (360 km) highway, and 227 mi (365 km) combined (city/highway). In August 2008, additional testing with the newer Powertrain 1.5 resulted in an EPA combined range of 244 mi (393 km). The vehicle set a new distance record when it completed the 241-mile (388 km) Rallye Monte Carlo d'Energies Alternatives with 36 miles (58 km) left on the charge.
Simon Hackett and Emilis Prelgauskas broke the distance record for an electric vehicle, driving 501 km (311 mi) from Alice Springs to Marla, South Australia, in Simon's Tesla Roadster. The car had about 4.8 km (3.0 mi) of range left when the drive was completed.
Tesla Motors refers to the Roadster's battery pack as the Energy Storage System or ESS. The ESS contains 6,831 lithium ion cells arranged into 11 "sheets" connected in series; each sheet contains 9 "bricks" connected in series; each "brick" contains 69 cells connected in parallel (11S 9S 69P). The cells are of the 18650 form-factor commonly found in laptop batteries. Sources disagree on the exact type of Li-Ion cells—GreenCar says lithium cobalt oxide (LiCo), while researchers at DTU/INESC Porto state lithium manganese oxide (LMO). LiCo has higher reaction energy during thermal runaway than LMO.
The pack is designed to prevent catastrophic cell failures from propagating to adjacent cells (thermal runaway), even when the cooling system is off. Coolant is pumped continuously through the ESS both when the car is running and when the car is turned off if the pack retains more than a 90% charge. The coolant pump draws 146 watts.
A full recharge of the battery system requires 3½ hours using the High Power Connector which supplies 70 amp, 240 volt electricity; in practice, recharge cycles usually start from a partially charged state and require less time. A fully charged ESS stores approximately 53 kWh of electrical energy at a nominal 375 volts and weighs 992 lb (450 kg).
Tesla Motors stated in February 2009 that the current replacement cost of the ESS is slightly under US$36,000, with an expected life span of 7 years/100,000 mi (160,000 km), and began offering owners an option to pre-purchase a battery replacement for US$12,000 today with the replacement to be delivered after seven years. The ESS is expected to retain 70% capacity after 5 years and 50,000 miles (80,000 km) of driving (10,000 miles (16,000 km) driven each year). However, a July 2013 study found that even after 100,000 miles, Roadster batteries still have 80%–85% capacity and the only significant factor is mileage (not temperature)  Tesla Motors provides a 3 year/36,000 mile warranty on the Roadster with an optional 4 year/50,000 mile extended warranty available at an "additional cost" (2008 Roadster buyers received the 4/50 extension at no cost while later purchasers need to pay). A non-ESS warranty extension is available for US$5,000 and adds another 3/36 to the coverage of components, excluding the ESS, for a total of 6 years for 72,000 mi (116,000 km).
Tesla Motors announced plans to sell the battery system to TH!NK and possibly others through its Tesla Energy Group division. The TH!NK plans were put on hold by interim CEO Michael Marks in September 2007. TH!NK now obtains their Lithium-Ion batteries from Enerdel.
If the battery is allowed to become completely discharged it will be irretrievably damaged and the only option is to replace it at a cost of $40,000. Neither insurance nor warranty will cover this cost; it has to be met out of the owner's own pocket. (see also Brick (electronics))
- A wall-mounted 208–240 V, 70 A maximum current Home Connector. This appears to be an OEM version of the TS-70 charging station from ClipperCreek.
- A portable 120–240 V, 40 A maximum current Universal Mobile Connector cable that can plug into a NEMA 14–50 receptacle and other 240V receptacles using adapters.
- A portable 120 V, 15 A maximum current Spare Mobile Connector cable that plugs into a standard North American domestic socket.
Charging times vary depending on the ESS's state-of-charge, the available voltage, and the available circuit breaker amp rating (current). In a best case scenario using a 240 V charger on a 90 A circuit breaker, Tesla documents a recharging rate of 56 miles (90 km)-of-range for each hour charging; a complete recharge from empty would require just under 4 hours. The slowest charging rate using a 120V outlet on a 15 A circuit breaker would add 5 miles (8.0 km)-of-range for each hour charging; a complete recharge from empty would require 48 hours.
In June 2006, Tesla Motors reported the Roadster's battery-to-wheel efficiency as 110 W·h/km (17.7 kW·h/100 mi) on an unspecified driving cycle—either a constant 60 mph (97 km/h)) or SAE J1634 test—and stated a charging efficiency of 86% for an overall plug-to-wheel efficiency of 128 W·h/km (20.5 kW·h/100 mi).
In March 2007, Tesla Motors reported the Roadster's efficiency on the EPA highway cycle as "135 mpg [U.S.] equivalent, per the conversion rate used by the EPA" or 133 W·h/km (21.5 kW·h/100 mi) battery-to-wheel and 155 W·h/km (24.9 kW·h/100 mi) plug-to-wheel.
In August 2007, Tesla Motors' dynamometer testing of a Validation Prototype on the EPA combined cycle yielded a range of 221 mi (356 km) using 149 W·h/km (23.9 kW·h/100 mi) battery-to-wheel and 209 Wh/km (33.6 kW·h/100 mi) plug-to-wheel.
In February 2008, Tesla Motors reported improved plug-to-wheel efficiency after testing a Validation Prototype car at an EPA-certified location. Those tests yielded a range of 220 mi (350 km) and a plug-to-wheel efficiency of 256 mpgge, or 199 W·h/km (32.1 kW·h/100 mi).
In August 2008, Tesla Motors reported on testing with the new, single-speed gearbox and upgraded electronics of Powertrain 1.5 which yielded an EPA range of 244 mi (393 km) and an EPA combined cycle, plug-to-wheel efficiency of 174 W·h/km, 630 kJ/km (28 kW·h/100 mi).
In 2007, the Roadster's battery-to-wheel motor efficiency was reported as 88% to 90% on average and 80% at peak power. For comparison, internal combustion engines have a tank-to-wheel efficiency of about 15%. Taking a more complete picture including the cost of energy drawn from its source, Tesla reports that their technology, assuming electricity generated from natural gas-burning power plants, has a high well-to-wheel efficiency of 1.14 kilometers per megajoule, compared to 0.202 km/MJ for gasoline-powered sports cars, 0.478 km/MJ for gasoline-powered commuter cars, 0.556 km/MJ for hybrid cars, and 0.348 km/MJ for hydrogen fuel cell vehicles.
The Roadster does not actually use gasoline; therefore, petroleum efficiency (MPG, L/100 km) cannot be measured directly but instead is calculated using one of several equivalent methods:
A number comparable to the typical Monroney sticker's "pump-to-wheel" fuel efficiency can be calculated based on regulations from the DOE and its energy content for a U.S. gallon of gasoline of 33,705 W·h⁄gal (also called the Lower Heating Value (LHV) of gasoline):
For CAFE regulatory purposes, the DOE's full petroleum-equivalency equation combines the primary energy efficiencies of the USA electric grid and the well-to-pump path with a "fuel content factor" that quantifies the value of conservation, scarcity of fuels, and energy security in the USA. This combination yields a factor of 82,049 W·h⁄gal in the above equation and a regulatory fuel efficiency of 293 mpggeCAFE.
Recharging with electricity from the average USA grid, the factor changes to 12,307 W·h⁄galUS to remove the "fuel content factor" = 1⁄0.15 and the above equation yields a full-cycle energy-equivalency of 44.0 mpgge full-cycle. For full-cycle comparisons, the sticker or "pump-to-wheel" value from a gasoline-fueled vehicle must be multiplied by the fuel's "well-to-pump" efficiency; the DOE regulation specifies a "well-to-pump" efficiency of 83% for gasoline. The Prius' sticker 46 miles per US gallon (5.1 L/100 km; 55 mpg-imp), for example, converts to a full-cycle energy-equivalent of 38.2 mpgfull-cycle.
Recharging with non-fossil fuel electricity sources such as hydroelectric, solar power, wind or nuclear, the petroleum equivalent efficiency can be even higher as fossil fuel is not directly used in refueling.
Monetary cost offers another way to find an equivalent fuel efficiency. Tesla Motors reports an energy cost of approximately US 1.4¢ per mile when using PG&E's E-9A rate plan (off-peak night-time incentive charging) cost of 5.294¢ per kWh which is available in the two U.S. states covered by PG&E. Comparison with a gasoline price of US$4.00/ U.S. gallon, for instance, results in an equivalent of 270 mpgge using the E-9 rate or 123 mpgge using the USA average residential electricity price of 11.6¢ per kWh. Including the battery replacement cost at its warranty limit, the cost per mile increases and the equivalent miles per gallon are reduced. The time value of money, improving battery technology, and a 6–8% annual reduction in battery cost all lower the net present costs of battery replacement. These factors allow Tesla Motors to sell customers a replacement battery pack for US$12,000, to be installed after the 7-year/70,000 miles (110,000 km) lifespan of the original pack, resulting in a net battery cost of 17.1¢/mile. Adding this to the electricity costs of 1.4¢/mile above results in an overall cost equivalence of $4/gal ÷ 18.5¢/mile = 21.5 mpgge, which can be compared to conventional car ratings after transmission, engine, and other drivetrain replacement costs are factored into the mpg ratings for those cars.
It has been pointed out that "Electric cars don't solve the automobile's environmental problems". This has reduced direct relevance to the Tesla Roadster, because its light weight reduces the amount of electricity consumed and of materials used. However due to the majority of United States still deriving electrical power from fossil fuel sources, the exact environmental impact is unclear.
Tesla Roadster reviews can be grouped in two main categories: older reviews of "validation prototypes" (2006–2008), before Tesla began serial production and customer deliveries, and reviews on cars in serial production (2008–2010).
The global online auto review site Autoguide.com tested Tesla's fourth-generation car in October 2010. Autoguide editor Derek Kreindler said "The Tesla Roadster 2.5 S is a massively impressive vehicle, more spacecraft than sports car. Theories like global warming, peak oil and rising oil prices should no longer bring heart palpitations to car fans. The Tesla shows just how good zero-emissions “green” technology can be. Quite frankly, getting into a normal car at the end of the test drive was a major letdown. The whirr of the engine, the shove in the backside and the little roadster that seems to pivot around you is replaced by a grunting, belching, feedback-free driving experience". He continues on that "but for a $100,000 car, it could use some work" complaining of purposefully cheap work.
In the March 2010 print edition of British enthusiast magazine EVO (p. 120), editor Richard Meaden was the first to review the all-new right-hand-drive version of the Roadster. He said the car had "serious, instantaneous muscle". "With so much torque from literally no revs the acceleration punch is wholly alien. Away from traffic lights you'd murder anything, be it a 911 Turbo, GT-R or 599, simply because while they have to mess about with balancing revs and clutch, or fiddle with launch controls and invalid warranties, all you have to do is floor the throttle and wave goodbye".
In December 2009, Wall Street Journal editor Joseph White conducted an extended test-drive and determined that "you can have enormous fun within the legal speed limit as you whoosh around unsuspecting Camry drivers, zapping from 40 to 60 miles per hour in two seconds while the startled victims eat your electric dust". White, a Pulitzer Prize-winning journalist, praised the car's environmental efficiency but said consumer demand reflected not the environmental attributes of the car but its performance. "The Tesla turns the frugal environmentalist aesthetic on its head. Sure, it doesn't burn petroleum, and if plugged into a wind turbine or a nuclear plant, it would be a very low-carbon machine. But anyone who buys one will get the most satisfaction from smoking someone's doors off. The Tesla's message is that "green" technology can appeal to the id, not just the superego".
In December 2009, MotorTrend was the first to independently confirm the Roadster Sport's reported 0 to 60 mph time of 3.7 seconds. (MotorTrend recorded 0 to 60 mph of 3.70 seconds; it recorded a quarter-mile test at 12.6 sec @ 102.6 mph.) Engineering Editor Kim Reynolds called the acceleration "breathtaking" and said the car confirms "Tesla as an actual car company. ...Tesla is the first maker to crack the EV legitimacy barrier in a century".
In November 2009, Automobile Magazine West Coast editor Jason Cammisa spent a week driving a production Tesla Roadster. Cammisa was immediately impressed with the acceleration, saying the car "explodes off the line, pulling like a small jet plane. ... It's like driving a Lamborghini with a big V-12 revved over 6000 rpm at all times, waiting to pounce—without the noise, vibration, or misdemeanor arrest for disturbing the peace". He also took the car to Infineon Raceway in Sonoma, California, and praised the car for its robustness, saying the Roadster:
"wins the Coolest Car I've Ever Driven award. Why? Despite the flat-out sprints, the drag racing, the donuts, the top-speed runs, and dicing through traffic like there's a jet pack strapped to the trunk, Pacific Gas and Electric—which generated power for the Tesla—released into the atmosphere the same amount of carbon dioxide as would a gasoline-powered car getting 99 mpg. And the Roadster didn't break. It didn't smoke, lock up, freeze, or experience flux-capacitor failure. Over the past ten decades, no company has been able to reinvent the car—not General Motors with the EV1, not Toyota with the Prius. And now, a bunch of dudes from Silicon Valley have created an electric car that really works—as both an environmental fix and a speed fix".
In 2009 the Tesla Roadster was one of the Scandinavian Sports Car of the Year participants, which is comparison made by Nordic car magazines Tekniikan Maailma (Finland), Teknikens Värld (Sweden) and Bil Magasinet (Denmark), they praised the torque of the car and a track car structure, negative things were e.g. short battery life. The car had some problems either the batteries or engine was overheating and they could not drive a full track lap at all in dry track conditions.
In May 2009, Car and Driver technical editor Aaron Robinson wrote a review based on the first extended test-drive of a production Tesla Roadster. Robinson had the car for nearly a week at his home. He complained of "design anomalies, daily annoyances, absurd ergonomics, and ridiculous economics " and stated he never got to see if the car could go 240 miles on a single charge because of the torturous seating forced him to stop driving the car. He also complained of Tesla increasing the car prices on those who had already made deposits and charging extra for previously free necessary components.
In February 2009, automotive critic Dan Neil of the Los Angeles Times called the production Tesla Roadster "a superb piece of machinery: stiff, well sorted, highly focused, dead-sexy and eerily quick". Neil said he had the car for 24 hours but "caned it like the Taliban caned Gillette salesmen and it never even blinked".
In February 2009, Road and Track tested another production vehicle and conducted the first independently verified metered testing of the Roadster. Engineering editor Dennis Simanitis said the testing confirmed what he called "extravagant claims", that the Roadster had a 4.0 s 0 to 60 mph (0 to 97 km/h) acceleration and a 200-mile (320 km) range. They said the Roadster felt like "an over-ballasted Lotus Elise", but the weight was well-distributed, so the car remained responsive. "Fit and finish of our Tesla were exemplary", which Road and Track thought fit the target market. Overall, they considered it a "delight" to drive. Testing a pre-production car in early 2008, Road and Track said "The Tesla feels composed and competent at speed with great turn-in and transitioning response", though they recommended against it as a "primary grocery-getter".
In January 2009, automotive critic Warren Brown of the Washington Post called the production Roadster "a head-turner, jaw-dropper. It is sexy as all get-out". He described the feeling behind the wheel as, "Wheeeeeee! Drive a Tesla, even if you have to fly to Tesla's Menlo Park, Calif., headquarters, to get your hands on one for a day. ... If this is the future of the automobile, I want it".
In a review of a Roadster prototype before the cars were in serial production, Motor Trend gave a generally favorable review in March 2008, stating that, it was "undeniably, unbelievably efficient" and would be "profoundly humbling to just about any rumbling Ferrari or Porsche that makes the mistake of pulling up next to a silent, 105 mpg Tesla Roadster at a stoplight".; however, they detected a "nasty drive-train buck" during the test drive of an early Roadster with the older, two-speed transmission.
In a July 8, 2007, review of a prototype Roadster, Jay Leno wrote, "If you like sports cars and you want to be green, this is the only way to go. The Tesla is a car that you can live with, drive and enjoy as a sports car. I had a brief drive in the car and it was quite impressive. This is an electric car that is fun to drive".
In a November 27, 2006, review of a prototype Roadster in Slate, Paul Boutin wrote, "A week ago, I went for a spin in the fastest, most fun car I've ever ridden in—and that includes the Aston Martin I tried to buy once. I was so excited, in fact, that I decided to take a few days to calm down before writing about it. Well, my waiting period is over, I'm thinking rationally, and I'm still unbelievably stoked about the Tesla".
Top Gear controversy
In the autumn of 2008, Top Gear's Jeremy Clarkson reviewed two production Roadsters with the v1.5 transmission and described the driving experience with the exclamations "God almighty! Wave goodbye to the world of dial-up, and say hello to the world of broadband motoring!" and "This car is biblically quick!" when comparing the acceleration versus a Lotus Elise. Clarkson also noted, however, that the handling of the car was not as sharp as that of the Lotus Elise: "through the corners things are less rosy". The Stig recorded a time of 1:27.2 on a moist track, faster than a Nissan 370Z on a dry track but slower than a Porsche 911 C2S also on a damp track, and also slower than the Lotus Exige, Exige S and Evora. The segment also claimed that the car's batteries would run flat after 55 miles (89 km) of heavy use on a track and showed the car being pushed off the track.
Tesla Motors' spokesperson responded with statements in blogs and to mainstream news organizations that the cars provided to Top Gear never had less than 20% charge and never experienced brake failure. In addition, neither car provided to Top Gear needed to be pushed off the track at any point. Finally, although Clarkson showed a limp windmill and complained that it would take countless hours to refuel the car using such a source of electricity, the car can be charged from a 240 V outlet in as little as 3.5 hours. After numerous blogs and several large news organizations began following the controversy, the BBC issued a statement saying "the tested Tesla was filmed being pushed into the shed in order to show what would happen if the Roadster had run out of charge. Top Gear stands by the findings in this film and is content that it offers a fair representation of the Tesla's performance on the day it was tested", without addressing the other alleged misrepresentations that Tesla highlighted to the media. After several weeks of increasing pressure and inquiries from the BBC, Clarkson wrote a blog for The Times, acknowledging that "Inevitably, the film we had shot was a bit of a mess. There was a handful of shots of a silver car. Some of a grey car". "But as a device for moving you and your things around, it is about as much use as a bag of muddy spinach". In the months that followed Clarkson's acknowledgment, the original episode—including the misstatements—reran on BBC America and elsewhere without any editing, though the BBC is still looking into Top Gear's journalism standards, according to British media reports.
On March 29, 2011, Tesla sued the programme over libel and malicious falsehood, while simultaneously launching the website TeslaVsTopGear.com. The current position of Tesla is found on their web page. In a blogpost, producer Andy Wilman has referred to Tesla's allegations as a "crusade" and argued the truth value of Tesla's statements. On October 19, 2011, the High Court in London rejected Tesla's libel claim. Tesla appealed High Court's decision to the Court of Appeals, where a 3-judge panel of Lords Justice upheld the lower court's decision, and ordered Tesla to pay the BBC's legal costs of £100,000.
- INDEX: Award 2007
- BusinessWeek: Best Product Design of 2007, Ecodesign
- Forbes: Best Cars 2006: New car that best lived up to the Hype
- Time: Best Inventions 2008 – Transportation Invention
- Time: Best Inventions 2006 – Transportation Invention
- Popular Mechanics: Breakthrough Awards 2006
- Global Green USA: Product/Industrial Design
- CarDomain: People's Choice: Most Exciting 2007 Car Launch
- 2009 Best Green Exotic, duPont REGISTRY
- Government incentives for plug-in electric vehicles
- List of fastest cars by acceleration
- List of electric cars currently available
- List of modern production plug-in electric vehicles
- List of production battery electric vehicles
- Tesla Model S
- Tesla Model X
- Tesla Motors
- Martin Eberhard, Tesla Motors CEO (2007-01-24). "Vintage Oil and Other Hare-Brained Ideas". Tesla Motors. Retrieved 2011-08-21.
- "Performance Specs". Tesla Motors. Archived from the original on October 24, 2007. Retrieved July 20, 2010.
- "High Power Wall Connector". Telsa Motors. Retrieved 2013-08-16.
- "J1772 Mobile Connector". Tesla Motors. Retrieved 13 May 2011.
- Todd Woody (2012-07-25). "Tesla Hits Accelerator Despite Q2 Revenue Miss". Forbes. Retrieved 2012-07-25. More than 2,350 units sold through June 2012.
- Tesla Motors (2012-11-05). "Tesla Q3 report: $50M revenues, $111M GAAP net loss, 253 Model S delivered in Q3". Green Car Congress. Retrieved 2012-11-06. Sales during the 3Q 2012: 68 Roadsters and 253 Model S.
- Tesla Motors (2013-02-20). "Tesla Motors, Inc. – Fourth Quarter & Full Year 2012 Shareholder Letter". Tesla Motors. Retrieved 2013-02-13.
- "Tesla will build right-hand-drive Roadsters for the UK". Wired.co.uk. 2009-06-25. Retrieved 2009-06-25.
- Tesla Showroom Tesla, 2010. Retrieved: 15 April 2010.
- "Growing Number of EU Countries Levying CO2 Taxes on Cars and Incentivizing Plug-ins". Green Car Congress. 2010-04-21. Retrieved 2010-05-21.
- Adam Vaughan (2010-02-25). "Electric vehicle grants scheme backfires as taxpayers subsidise £87,000 sports cars". London: The Guardian. Retrieved 2010-05-21.
- "Tesla Motors Moving Quickly to Commercialization of an Electric Car". GreenCar Magazine. 2009-07-09. Retrieved 2009-08-01.
- Posted by tsport100 (2011-01-05). "New World Record: Tesla Roadster Goes 347.2 Miles On One Charge | Electric Vehicle News". Electric-vehicles-cars-bikes.blogspot.com. Retrieved 2011-04-18.
- "Internode Electric Tesla sets world distance record in 2009 Global Green Challenge". Global Green Challenge. Retrieved 2009-11-03.
- Monday, March 29, 2010 (2010-03-29). "Tesla Sweeps Monte Carlo Alternative Energy Rally | Press Releases". Tesla Motors. Retrieved 2010-10-09.
- Tesla Motors (2011-02-25). "Tesla Motors Selects BorgWarner for Production of New Gearbox for Tesla Roadster". Tesla Motors.
- "Roadster Innovations: Motor". Tesla Motors. Retrieved 2011-02-25. "The Roadster achieves an overall driving efficiency of 88%, about three times the efficiency of a conventional car."
- "Tesla Motors Hosts World Debut of Tesla Roadster Offering Performance, Style & Efficiency – With a Conscience" (Press release). Tesla Motors. 2006-07-20. Retrieved 2007-04-24.
- Eric Mayne (2009-09-04). "Drive Tesla Roadster; Forget What You Knew About Acceleration" (PDF). WardsAuto.com. Retrieved 2010-06-21.
- "Tesla Roadster 2". Automobiles review. 2009-07-22. Retrieved 2010-06-21.
- Wayne Cunningham (2010-04-30). "Globe-trotting Tesla Roadster Reaches Moscow". The Car Tech Blog. CNET.com. Retrieved 2010-05-03.
- Thursday, July 1, 2010 (2010-07-01). "Tesla Unveils Roadster 2.5 at Newest Stores in Europe and North America | Press Releases". Tesla Motors. Retrieved 2010-10-09.
- Wind in the tank Wind Energy. Retrieved: 24 September 2010.
- Tesla Motors (2012-02-27). "Tesla Motors Inc – 10-K -Management's Discussion And Analysis Of Financial Condition And Results of Operations". MSP News Channels. Retrieved 2012-08-28.
- Chris Woodyard (2011-08-03). "Tesla boasts about electric car deliveries, plans for sedan". USA Today. Retrieved 2011-10-04.
- Josie Garthwaite (2011-05-06). "Tesla Prepares for a Gap as Roadster Winds Down". The New York Times. Retrieved 2011-05-07.
- Dillow, Clay. (2011-06-23) Farewell Roadster: Tesla Will Stop Taking Orders for its Iconic EV in Two Months | Popular Science. Popsci.com. Retrieved on 2013-08-10.
- Valdes-Dapena, Peter. "Tesla Roadster reaches the end of the line". Yahoo!.
- Eric Loveday (2013-04-03). "Tesla VP: Next-Gen Tesla Roadster to Push EV Envelope to the Extreme; Will Boast More Range and be Quicker Than Original Roadster". Inside EVs. Retrieved 2013-10-25.
- Mark Tisshaw (2011-10-26). "Tesla plans all-new Roadster". Autocar. Retrieved 2011-10-29.
- Danny King (2012-01-11). "Tesla continues Roadster sales with tweaks in Europe, Asia and Australia". Autoblog Green. Retrieved 2012-01-13.
- Nikki Gordon-Bloomfield (2012-01-12). "Tesla Updates Roadster For 2012. There’s Just One Catch...". Green Car Reports. Retrieved 2012-01-16.
- Damon Lavrinc (2011-12-16). "This is the last Tesla Roadster". Autoblog Green. Retrieved 2011-12-17.
- State of Delaware (2003-07-01). "Division of Corporations – Online Services". Retrieved 2009-10-12. "Tesla Motors incorporation is found under file number 3677166"
- "Elon Musk Envisions Tesla Electric Car as Low as $20K: Cleantech News «". Gigaom.com. 2008-09-17. Retrieved 2010-10-09.
- "Tesla Motors, Inc. Registration Statement on Form S-1 filed with SEC". 2010-01-29. Retrieved 2010-10-22.
- "Tesla Motors team". Tesla Motors.
- "Tesla Roadster". Index. 2007.
- "Reductive Charging, AC Propulsion's Reductive Charger Integrated Charging for the Electric Vehicle". AC Propulsion. Archived from the original on 2007-02-06. Retrieved 2007-03-07.
- Sam Abuelsamid (2008-06-24). "AutoblogGreen Q&A: Tesla Motors Chairman Elon Musk Part 2 – Transmission shifts". Retrieved 2008-06-24.
- Tarpenning, Marc; Martin Eberhard (2007-08-24). "Well-to-Wheel Energy Efficiency". Tesla Motors. Archived from the original on 2007-10-11. Retrieved 2011-02-25. "The AC Propulsion lithium-ion charging system (the basis for the design of the Tesla Roadster charging system)..."
- Elon Musk (2009-06-22). "Tesla Leadership". Tesla Motors. Archived from the original on July 25, 2009. Retrieved 2009-08-01. "Tesla Motors, Inc. consisted of Eberhard, Tarpenning and Wright, plus an unfunded business plan and they were looking for an initial round of funding to create a more advanced prototype than the AC Propulsion Tzero. While there was a basic corporation in place, Tesla hadn't even registered or obtained the trademark to its name and had no formal offices or assets. To save legal fees, we just copied the SpaceX articles of incorporation and bylaws for Tesla and I invested $6.35M (98%) of the initial closing of $6.5M in Series A funding. Eberhard invested $75k (approximately 1%)."
- Dopson & Colson. Supply agreement for products and services based on Lotus Elise technology OneCLE, 11 July 2005. Retrieved: 7 September 2010.
- Bennett & Donoughe. Contract Amendment 1 OneCLE, 4 August 2009. Retrieved: 7 September 2010.
- Martin Eberhard, Tesla Motors CEO (2007-08-07). "The Future of Cars is Electric". Tesla Motors. "Video available from Google Video. Slide 90 shows that "The ESS consists of 6831 individual cells that are electrically connected into parallel groups of 69 cells". (11S 9S 69P)"
- "The Next Leg of the Race". 2007-08-15.
- Notices and Final Rules: Air Bag Information. Nhtsa.dot.gov. Retrieved on 2013-08-10.
- NHTSA (2008-01-28). Docket No. NHTSA-2008-0013. Tesla Motors, Inc.; Grant of Application for a Temporary Exemption From Advanced Air Bag Requirements of Federal Motor Vehicle Safety Standard No. 208 (PDF) 73 (18). U.S. GPO.
- Ken Thomas (2008-01-28). "Tesla Sports Car Gets Air Bag Waiver". USA Today. Associated Press. Retrieved 2008-12-30.
- Siry, Daryl (2008-02-29). "Mythbusters Part 1: Airbags? We got 'em!". Tesla Motors. Retrieved 2008-12-30.
- "Press Releases". Tesla Motors. 2009-08-07. Retrieved 2009-09-14.[dead link]
- "Tesla Extends Production Contract with Lotus". Automobile Magazine. 2010-03-30. Retrieved 2010-04-05.
- "Tesla Celebrates 1,000th Roadster" (Press release). Tesla Motors. 2010-01-12. Retrieved 2010-09-13.
- Michael Shnayerson (May 2007). "Quiet Thunder". Vanity Fair. Retrieved 2007-04-24.
- Barrie Dickinson, Tesla Motors Director of Body Engineering (2007-02-15). "Cut From a Different Cloth". Tesla Motors. Retrieved 2008-02-15.
- JOHN D. STOLL, NORIHIKO SHIROUZU and NEAL E. BOUDETTE (2008-04-08). "Detroit Sets Bold Goal: Exporting U.S. Cars". Wall Street Journal. Retrieved 2008-06-10. "Tesla Motors, a Northern California start-up developing an electric car, recently decided to scrap plans to build its US$20,000-plus batteries in Thailand. Instead, it will assemble the components in the U.S. because of currency values."
- Ze'ev Drori, Tesla Motors President and CEO (2007-12-27). "A Letter to Customers from Ze'ev Drori". Tesla Motors. Archived from the original on December 30, 2007. Retrieved 2007-12-31.
- Robert Scoble (2008-02-19). "Ride in first production Tesla with Elon Musk". Retrieved 2008-02-26. "2:58 into video Elon Musk says "This particular car [P1] actually has two speeds""
- Daryl Siry, Tesla Motors Vice President of Sales, Marketing, and Service (2007-12-12). "Re: My Town Hall Notes". Retrieved 2008-02-12.[dead link]
- Tesla Production Slower Than Expected, Greentech Media, May 16, 2008
- Tesla declares transmission problems solved, finished Roadster now in production, Motor Trend, September 10, 2008
- Tesla Roadster takes green trend for joy ride, The Michigan Journal, September 30, 2008
- The Jersey Turnpike is No Match for the Roadster, Wired, November 19, 2008
- Tesla Motors hands keys to 100th Roadster owner, The Mercury News, December 10, 2008
- Tesla Motors Says Will Be Profitable in 2009, pcmag.com, February 11, 2009
- Orders streaming in for new Tesla electric sedans, Physorg.org, April 2, 2009
- "Tesla To Do House Calls" (Press release). Tesla Motors. 2009-05-28. Retrieved 2009-10-02.
- Tesla Recalls More Than 75% Of Its Roadsters, Business Insider, May 28, 2009
- Tesla Motors Delivers 500th Roadster, Tesla Press Room, June 3, 2009
- Electric roadster maker making money, CNN, August 7, 2009
- Electric Sports-Car Maker Tesla Gets $82.5 Million Investment, Bloomberg.com, September 15, 2009
- "Press Center". Tesla Motors. Retrieved 2010-10-09.
- "Press Releases". Tesla Motors. Retrieved 2009-08-06.[dead link]
- Electric dreams less wild, more pragmatic at 2010 auto show, the Boston Herald, January 13, 2010
- "Form S-1, Registration Statement under The Securities Act of 1933: Tesla Motors, Inc.". Securities and Exchange Commission. 2010-01-29. Retrieved 2010-01-30.
- Squatriglia, Chuck (2010-01-29). "Tesla's Roadster To Exit In 2011". Wired Magazine. Retrieved 2010-01-30.
- Tesla Prospectus, U.S. Securities and Exchange Commission. Retrieved February 7, 2010.
- Squatriglia, Chuck (2010-03-15). "Tesla Roadster Gets a Reprieve – And New Markets". Wired Magazine. Retrieved 2010-03-15.
- Tesla delivers 100th German car during Race of Champions, TeslaMotors.com, December 2, 2010
- , Teslamoters.com, September 28, 2011
- "Press Releases". Tesla Motors. Retrieved 2009-08-30.[dead link]
- "Press Releases". Tesla Motors. Retrieved 2009-08-30.[dead link]
- "Tesla to sell electric cars in Europe". Financial Times. 2008-04-02. Retrieved 2009-06-09.
- Justin Aschard (2012-11-30). "Inmatriculations VP et VUL Europe 18 à fin Oct. (2010–2012) 2012" [Registrations of passenger cars and utility vehicles in Europe 18 through October 2012 (2010–2012)] (in French). France Mobilité Électrique. Retrieved 2012-12-05.
- "Tesla apre a Milano". Omniauto.it. 2003-12-15. Retrieved 2011-06-21.
- "A tu per tu con Elon Musk, l’uomo-Tesla". Alvolante.it. Retrieved 2011-06-21.
- Mark Prigg (2008-08-21). "The Green Mean Machine". The Evening Standard (London). Retrieved 2008-08-22.
- "Tesla Motors". Tesla Motors. 2007-07-06. Retrieved 2009-06-09.
- Grünweg, Tom (8 May 2012). "200,000 Kilometer im Tesla Roadster" [200,000 km in the Tesla Roadster]. Der Spiegel (in German). Retrieved 30 June 2012.
- Chris Bethros (2011-03-31). "Socket to ‘Em". Metropolis Japan. Archived from the original on 2013-06-26. Retrieved 2013-06-26.
- "Service Everywhere | Own a Tesla | Tesla Motors". Tesla Motors. Retrieved 7 August 2010.
- "Press Releases". Tesla Motors. Retrieved 2009-08-30.[dead link]
- Sam Abuelsamid (2008-05-02). "First Tesla store opens in Santa Monica, now we just need some cars".
- David Pogue (2007-04-05). "Solving the Car Propulsion Problem". New York Times.
- Motors, Tesla (2008-05-15). "Program Update | Blog". Tesla Motors. Retrieved 2011-04-18.
- "Tesla Motors introduces Roadster Sport". Tesla Motors. 2008-01-11. Retrieved 2009-01-14.[dead link]
- "Roadster Sport". Tesla Motors. 2009-01-11. Retrieved 2009-01-14.[dead link]
- "How stuff works". Tesla Motors. 2010-01-11. Retrieved 2010-01-11.
- Neff, John (2007-12-19). "Tesla clarifies report of "temporary transmissions"".
- Ze'ev Drori (2007-12-17). "A Letter to Customers from Ze'ev Drori". Tesla Motors. Archived from the original on December 31, 2007. Retrieved 2009-12-08.
- Motor Trend First Test: 2010 Tesla Roadster Sport
- Iain Morrison, Telsa Motors Test & Validation Engineer (2008-11-10). "Drag-racing in the Roadster: A first-person account". Retrieved 2008-12-14.
- Ramsey, Jonathon (2009-03-26). "Tesla Model S: US$50,000 EV sedan seats seven, 300-mile range, 0–60 in 5.5s". autobloggreen. Retrieved 2009-04-12.
- "Tesla Motors introduces Roadster Sport" (Press release). Tesla Motors. 2009-01-11. Retrieved 2009-05-07.
- "Tesla Roadster Sport NEDRA record 12.643 at 1/4 mile « Peak Oil Garage". Peakoilgarage.com. 2009-07-27. Retrieved 2009-08-01.
- Tesla Motors (2008-02-28). "How far can the Tesla Roadster drive between charges?". Tesla Motors. Archived from the original on July 29, 2008. Retrieved 2008-12-13.
- Taylor, Alun (2009-04-10). "Tesla Roadster runs for 241 miles in Monte Carlo e-rally • Register Hardware". Reghardware.co.uk. Retrieved 2009-08-01.
- "Internode M.D. smashes E.V. world distance record". 2009-10-29. Retrieved 2009-10-29.
- Voelcker, John (18 January 2013). "Boeing 787 Batteries Same As Those In Electric Cars? Umm, NO". GreenCar. Retrieved 18 January 2013.
- Rodrigo Garcia-Valle, João Abel Peças Lopes (28 September 2012). Electric Vehicle Integration Into Modern Power Networks. Springer. p. 33. ISBN 1461401348, 9781461401346 Check
- Dalløkken, Per Erlien (January 17, 2013). "Her er Dreamliner-problemet" (in Norwegian). Teknisk Ukeblad. Retrieved January 17, 2013. English translation
- US patent 7433794, Berdichevsky; Eugene Michael (Palo Alto, CA), Cole; Philip David (Redwood City, CA), Hebert; Arthur Joseph (San Carlos, CA), Hermann; Weston Arthur (Palo Alto, CA), Kelty; Kurt Russell (Palo Alto, CA), Kohn; Scott Ira (Menlo Park, CA), Lyons; David Frederick (Palo Alto, CA), Straubel; Jeffrey Brian (Menlo Park, CA), Mendez; Noel Jason (Mountain View, CA), "Mitigation of propagation of thermal runaway in a multi-cell battery pack", issued 2008-10-07
- "That Little Water Pump". Tesla Motors Club Forum. Teslamotorsclub.com. Retrieved 2009-06-09.[dead link]
- Wasting Energy like Two Really Nice Refrigerators, October 12, 2008
- Andrew Simpson, Telsa Motors (March 23, 2008). "Response to the CARB ZEV Expert Panel Position on Lithium-Ion Full-Performance Battery Electric Vehicles" (PDF). Tesla Motors.
- The Tesla Roadster Battery System, page 2
- Toomre, Tesla Motors Director of Manufacturing Programs, Eric (2007-08-08). "The Most Coddled Automotive Battery Ever?". Tesla Motors. Retrieved 2009-02-17.
- Belding, Tony (2007-03-13). "Buying Replacement ESS". Tesla Motors Club. Retrieved 2009-02-27.[dead link]
- Musk, Elon (2009-02-12). "Tesla Motors Update". Tesla Motors. Retrieved 2009-02-17.[dead link]
- Matt Nauman (2007-05-22). "Tesla Motors to sell batteries in $43 million deal with Think". San Jose Mecury News. Retrieved 2007-06-19.
- Sebastian Blanco. "EDTA Conference: Tesla Motors ready to license battery tech to other companies". Retrieved 2007-03-11.
- Michael Kanellos (2007-10-16). "Tesla delays its battery business, but test drives begin". News.com. Retrieved 2008-02-09.
- Tesla Motors' Devastating Design Problem. Jalopnik.com (2012-02-21). Retrieved on 2013-08-10.
- "Tesla Motors – Charging Solutions". Tesla Motors. Archived from the original on 2010-01-04. Retrieved 2010-05-11.
- "ClipperCreek to Supply Power Control Stations for Tesla Motors" (Press release). ClipperCreek. 2009-04-30. Retrieved 2010-05-11.
- "Charging". Tesla Motors. Retrieved 2010-10-09.
- Idaho National Laboratory. "EVAmerica Baseline Performance Testing for 1997 General Motors EV1 with PbA Batteries" (PDF). Retrieved 2007-03-05. "Footnote 8 in Tesla Motor's white paper refers to this INL study for the equivalent efficiency number from GM EV1 testing but does not specify the driving cycle."
- Martin Eberhard, Marc Tarpenning (2006-10-06). The 21st century Electric Car (PDF). Tesla Motors. Archived from the original on October 13, 2007. Retrieved 2007-02-23.
- Elon Musk (2007-03-07). Musk Testimony (Microsoft Word). United States Senate Committee on Energy & Natural Resources. Retrieved 2007-03-14.
- "Tesla Motors Corporate Backgrounder" (Press release). Tesla Motors. Retrieved 2006-12-05. "...the Tesla Roadster is capable of 135 mpg equivalent..."
- Edmunds.com Inside Line (2006-07-21). "Tesla Roadster: Lotus Helps Create Sporty 135 MPG Electric Car". Retrieved 2006-12-05. "...achieves the equivalent of 135 mpg."
- Neil, Dan (2006-07-20). "A roadster that's electric". Marketplace Public Radio. Retrieved 2006-09-18.
- Andrew Simpson, Tesla Motors Vehicle Systems Engineer (2007-09-24). "Where the Rubber Meets the Road". Retrieved 2008-02-22. "Mr. Simpson confirmed via email that "We do not quote station-to-wheel efficiency, but we do quote plug-to-wheel efficiency which includes all energy use downstream of the charging plug. For the most recent 221 mi (356 km) range test, our plug-to-wheel efficiency was 336 Wh/mi"."
- "Tesla Motors". Retrieved 2008-06-25. "256 mpg equivalent*, 220 miles per charge*, less than 2¢ per mile*...* Range is based on our most recent testing with a Validation Prototype car at an EPA-certified location in February 2008. EPA range is subject to change pending future testing. Actual range will vary with driving style and conditions. Conversion from electric consumption to gallons of gasoline equivalent is calculated using the Department of Energy equivalence factor documented in the Code of Federal Regulations, Section 10, Part 474."
- Rogers, John (2008-05-02). "Tesla rolls out its long-awaited electric sports car". The Seattle Times. Associated Press. Retrieved 2008-05-02.
- "Tesla Motors". Retrieved 2008-10-29. "*[244 mile] Range is based on our most recent testing with a Validation Prototype car at a location certified by the U.S. Environmental Protection Agency (EPA) in August 2008. EPA-certified electricity consumption is 28 kW·h per 100 miles (17 kW·h/100 km or 630 kJ/km) on EPA combined cycle. EPA range and electricity consumption are subject to change pending future testing. Actual range and electricity consumption will vary with driving conditions and charging location. [Pennies per mile] Cost calculated using average winter/summer PG&E schedule E-9 off-peak "rate A" tariff, as of March 1, 2007."
- "2007 Tesla Roadster Technical Specifications". Archived from the original on 2007-10-20. Retrieved 2011-02-25.
- US EPA. "Advanced Technologies and Energy Efficiency". Retrieved 2008-02-10.
- "Using Energy Efficiently". Tesla Motors. Retrieved 2022-02-25.
- U.S. Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy (2000-07-12). 10 CFR Part 474, Electric and Hybrid Vehicle Research, Development, and Demonstration Program; Petroleum-Equivalent Fuel Economy Calculation; Final Rule (PDF). U.S. GPO, Federal Register Vol. 64 No. 113. Retrieved 2006-09-22.
- "fueleconomy.gov 2003 Toyota RAV4 EV". USDOE and U.S. Environmental Protection Agency. 2003. Retrieved 2009-05-11.
- "Model 1 Vehicle Characteristics". Fueleconomy.gov. 2006-09-10. Retrieved 2011-06-21.
- "Advanced Natural Gas Turbine Hailed as Top Power Project of 2003". DOE. 2003-12-30. Retrieved 2007-03-14.
- "Electric Vehicles (EVs)". Fueleconomy.gov. Retrieved 2009-06-09.
- Brian K. Cherry, PG&E Vice President Regulation and Rates (2011-06-11). "ELECTRIC SCHEDULE E-9 EXPERIMENTAL RESIDENTIAL TIME-OF-USE SERVICE FOR LOW EMISSION VEHICLE CUSTOMERS". Retrieved 2011-10-11. "Resolution No. 2C10, Advice Letter No: 3856-E, Decision No. 11-05-047, Issued by Brian K. Cherry Vice President Regulation and Rates, Date Filed June 8, 2011, Effective June 20, 2011"
- "Charging". Pge.com. 2008-12-15. Retrieved 2011-04-18.
- "Prices and Factors Affecting Prices". 2011-07-28. Retrieved 2011-10-11.
- Davis, Craig (2009-04-03). "Tesla Motors, Inc. Battery Replacement Agreement". Tesla Motors, Inc. Retrieved October 14, 2011.
- Reynolds, Kim (2010-10-14). "Tesla's Open House So This is What a Silicon Valley Car Maker Looks Like". Motor Trend. Retrieved October 14, 2011. "(By the way, these cells are also now being created specifically for EVs, leaving their laptop origins behind; they're also seeing year-over-year price drops of 6–8 percent)"
- Shai Agassi's bold plan for electric cars. TED Talks. Event occurs at 0:04:14. Retrieved 2011-02-22. "[The battery] consumes itself step after step after step. It has 2,000 life cycles these days. And so it's sort of a mini [oil] well. We were asked in the past when we bought an electric car to pay for the entire [oil] well, for the life of the [electric] car."
- Ozzie Zehner, Photo Illustration by Smalldog Imageworks (2013-07) "Unclean at Any Speed", IEEE Spectrum, pp. 40–45 and cover.
- "2011 Tesla Roadster 2.5 S Review: Car Reviews". Autoguide.com. 2010-10-12. Retrieved 2011-04-18.
- White, Joseph B. (2009-12-16). "The Surge in Electric Cars". The Wall Street Journal.
- "2010 Tesla Roadster Sport Specs". Motor Trend. Retrieved 2010-10-09.
- "2009 Electric Tesla Roadster – Electric Convertible Sport Coupe – Automobile Magazine". Automobilemag.com. Retrieved 2010-10-09.
- "Scandinavian Sports Car of the Year 2009". tekniikanmaailma.fi. 2009. Retrieved 2011-03-30. (Finnish)
- 2009 Tesla Roadster – Road Test, Car and Driver, May 2009. Retrieved August 23, 2009.
- Neil, Dan. Tesla Roadster packs power in a flash of electricity, Los Angeles Times, February 6, 2009. Retrieved August 23, 2009.
- "World Exclusive: First Complete Test of the 2009 Tesla Roadster". Road and Track. February 2009. Retrieved 2008-12-21.
- "First Drive: 2008 Tesla Roadster". Road and Track. March 2008. Retrieved 2008-03-21.
- Brown, Warren. A Jaw-Dropping Ride, Batteries Included, Washington Post, January 25, 2009. Retrieved August 23, 2009.
- "First Drive: 2008 Tesla Roadster". Motor Trend. Retrieved 2008-03-21.
- Jay Leno (2007-07-08). Tesla Roadster – The most fun you can have without fuel. London: The Sunday Times
- Paul Boutin (2006-11-27). "It's Electric! The Tesla Roadster—a hotshot sports car that runs on batteries.". www.Slate.com.
- Clarkson, Jeremy. Tesla Roadster, "The Sunday Times", January 11, 2009. Retrieved August 29, 2009.
- Top Gear Track, Great Britain. "FastestLaps". Retrieved August 29, 2009.
- Squatriglia, Chuck (2008-12-16). "Tesla Cries Foul On Top Gear's Test | Autopia". Wired.com. Retrieved 2009-08-30.
- ""Tesla Roadster Reviewed by Jeremy Clarkson Didn't Run Out of Juice as He Claimed" Green Car Advisor". Blogs.edmunds.com. January 15, 2009. Retrieved 2009-08-30.
- "Tesla clears up some of Clarkson's claims during Tesla Roadster test drive". egmCarTech. 2008-12-16. Retrieved 2009-05-05.
- Squatriglia, Chuck (2008-12-16). "Tesla Cries Foul On Top Gear's Test | Autopia". Blog.wired.com. Retrieved 2009-05-05.
- Chang, Richard S. (2008-12-30). "Was 'Top Gear' Test of the Tesla Misleading?". The New York Times. Retrieved 2009-08-30.
- Taylor, Alun (2008-12-22). "BBC: Top Gear Tesla didn't run out of juice • Register Hardware". Reghardware.co.uk. Retrieved 2009-05-05.
- Jeremy Clarkson sparks new BBC row over Top Gear electric supercar test 'failure', Daily Mail, December 26, 2008. Retrieved August 23, 2009
- "tesla vs Top Gear". www.teslamotors.com. 2013-02-11. Retrieved 2013-02-11.
- Wilman, Andy (2011-04-02). "Transmission – BBC Top Gear Tesla vs Top Gear: Andy Wilman on our current legal action «". Transmission.blogs.topgear.com. Retrieved 2011-04-18.
- "Tesla losing Top Gear court challenge". The Independent. October 21, 2011. Retrieved October 21, 2011.
- "Top Gear row: Tesla loses appeal over Jeremy Clarkson review". The Guardian. May 5, 2013. Retrieved November 4, 2013.
- "INDEX Award 2007".
- "Best Product Design of 2007, Ecodesign".
- "Best Cars 2006: New car that best lived up to the Hype".[dead link]
- "TIME Best Inventions 2008". Time.com. 2008-10-29. Retrieved 2009-06-09.
- "TIME Best Inventions 2006". Time.com. Retrieved 2009-06-09.
- Ward, Logan (November 2006). "BREAKTHROUGH AWARDS 2006: Innovators Martin Eberhard and Team". Popular Mechanics. Retrieved 2008-01-23.
- "Tesla Motors Receives 'Environmental Leadership' Award from Global Green USA" (Press release). Tesla Motors. 17 October 2006. Retrieved 2008-01-23.
- "Awards". Global Green USA. Retrieved 2008-01-23.
- "CarDomain Car Blog: People's Choice!". Blog.cardomain.com. Retrieved 2009-06-09.
- Ramsey, Jonathon (2008-10-09). "duPont Registry's 11 "Best of" cars set horsepower, price records". Autoblog. Weblogs, Inc. Retrieved 2008-03-20.
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