|Also called||Reva NXR|
|Assembly||Bangalore, Karnataka, India|
|Body and chassis|
|Body style||3-door hatchback|
|Electric motor||3 Phase Induction Motor|
|Battery||11 to 16kWh Li-ion|
|Range||120 km (75 mi)|
|Curb weight||830 kg (1,830 lb)|
|Successor||Mahindra e2o Plus|
The Mahindra e2o, previously Reva NXR, is an urban electric car hatchback manufactured by Mahindra Reva or Reva Electric Vehicles. The e2o is the successor of the REVAi (or G-Wiz as it was known in the UK) and was developed using Reva's technology, and has a range of 120 km (75 mi).
In 2006, the G-Wiz became the world's best-selling Electric Vehicle and by 2008, the company managed to sell over 950 G-Wiz electric cars, making it the UK's best-selling electric car of all time at that time (the record was later surpassed by the Nissan LEAF, with over 14,000 sold by 2016; the LEAF was in turn surpassed by the Mitsubishi Outlander, with over 23,000 sold in the UK by the end of 2016).
The e2o, a two-door, four-seater hatchback, is equipped with features like automatic transmission and allows the buyer to lock the car and operate the A/C using a mobile application. According to Forbes, the car "will inoculate its buyers from rising gas prices, provide relief from tailpipe exhaust on India’s polluted streets, and provide a much more convenient and cost effective alternative for the urban city driving."
The car was discontinued in India in November 2016, coinciding with the start of production of the larger e2o Plus, though Mahindra Electric CEO announced that "the e2o will continue to sell in the export market".
The e2o was retired from UK market in May 2017 due to poor sales and trading situation under Brexit, the company bought back at full price the cars from customers.
Mahindra Electric Mobility Limited, formerly known as the Reva Electric Car Company (RECC), was founded in 1994 by Chetan Maini, as a joint venture between the Maini Group of Bengaluru and Amerigon Electric Vehicle Technologies (AEVT Inc.) of the USA. The company's sole aim was to develop and produce an affordable compact electric car. Several other automakers were also aiming to do so, but in 2001 RECC launched the REVA electric car, the company's flagship vehicle, which was available in 26 countries with more than 4,000 of its different versions sold worldwide by mid March 2011.
Reva was acquired by Indian conglomerate Mahindra & Mahindra in May 2010. In 2013, Mahindra Reva was selected as one of "The World’s 50 Most Innovative Companies 2013″ by Fast Company.
Since inception, the company has come to be regarded as a pioneer in the electric vehicles space.
The Reva NXR M1 class electric concept car was unveiled at the 2009 Frankfurt Motor Show. Production was initially scheduled for late 2010 with deliveries slated for early 2011; export production was initially scheduled for 2012. It was later rescheduled for late 2012 only for the Indian market, and took place in March 2013  when the Mahindra e2o was launched.
According to the company, the market launch was delayed while waiting for the Indian government to decide if it would offer consumer tax benefits for electric car buyers. The incentives were not included in the 2013-14 Indian government budget, but the company decided to go ahead with the market launch. The company expects Delhi to become the biggest market for the e2o because the city offers a 29% subsidy for the purchase of electric cars. The company has already set up over 250 charging stations in various cities, with 95 in Delhi and over 100 in Bengaluru.
The Mahindra e2o was expected to be available with either lead-acid or lithium-ion batteries. The car's exterior concept was initiated in collaboration with DC Design, and detailed design of production exterior and interior styling was done in-house by Reva's R&D and Styling team.
Range, speed, safety and interior specifications fall along the lines of a new generation of battery electric vehicles. In Europe, the process might start with Mahindra e2o undergoing M1 categorisation. The earlier Reva was exempted from most European crash test rules because of its low weight and power, and it was registered in the European ‘heavy quadricycle’ category instead of the ‘car’ category. Now the Mahindra e2o like any other car sold in Europe, has to have a crash test, ABS and airbags. The Mahindra e2o however, passed all safety tests in 2013 when it was crash tested in Spain.
The Mahindra e2o has features like a REVive battery charging system. Through the telematic remote access to the car's on-board Energy Management System, the company's support centre can individually determine the battery condition and allow access to a small reserve charge. Mahindra e2o is manufactured through processes that do not pollute all the way from the design stage in India's first Platinum certified automobile plant. The facility itself is naturally lit and ventilated, uses LED lights, recycles, gets 35 percent of its power from solar panels and is claimed to be 60-70 percent more efficient than a conventional facility. Much like a modern-day smartphone, the Mahindra e2o has functions that can be powered remotely. Remote diagnostics through telematics monitors the e2o on a daily basis giving instant diagnosis of any existing or impending problems. A smartphone app provides information of the car’s state of charge, and even sends a reminder for its various functions. One can remotely lock and unlock the car, start and stop charging, turn the car on and off, switch the air conditioning on and off and even set a schedule using the smartphone app.
There are other ingenious technologies that have been incorporated in the e2o such as Sun2Car, and Regenerative braking system that further boost the car's range. The Sun2Car, for instance, allows people to charge the e2o using solar energy while it's parked. The regenerative braking technology puts energy back into the car’s batteries and charges them every time the brake is applied or the accelerator is not pressed.
The car has a lithium-ion battery pack that takes five hours for a full charge, and with a weight of 830 kg (1,830 lb), delivers a range of 120 km (75 mi) and a top speed of 90 km/h (56 mph). The e2o is one of the more advanced cars on Indian roads, with smartphone-controlled features, GPS navigation system and a dashboard-mounted touchscreen, keyless entry, start/stop button, and regenerative braking. According to the company, the car's safety features comply with European norms.
Production and sales
The Mahindra e2o is manufactured at the company's Bengaluru factory. The company invested ₹100 crore (US$18.5 million) on the development of the car and construction of a manufacturing plant with an annual capacity of 30,000 units a year, and initially projected to sell only about 400 to 500 units a month, with Delhi accounting with about 150 to 200 units. Due to delays in the roll-out of the central government incentives, in November 2013 the company announced it was scaling back plans to release of other electric vehicles, and reported that by mid November only about 400 units have been sold in India, Nepal and Sri Lanka.
As a response to lower sales than initially expected, the e2o Premium variant was launched in August 2014  with Electric Power steering and 120 km range upgrade 120 km (75 mi) at 5.72 lakh INR (ex- showroom Delhi) with a monthly energy fee of Rs. 2,999. The energy fee has been rechristened as “e2o care protection plan”.
To address consumer concerns of high initial acquisition cost, Mahindra Reva introduced an ownership program, “Goodbye Fuel, Hello Electric”. The program splits the acquisition cost into initial cost and e2o care protection plan. Under this program, the company would guarantee the performance of the battery as the ownership of the battery lies with Mahindra Reva. The company will also provide the 24X7 assistance and a courtesy car during battery repair period.
Apart from Mahindra e2o, Mahindra Reva is also working on an all-electric sports car concept called Halo. It is claimed to reach 0-100 kmph under 8 sec with a top speed of 160 kmph and range of over 200 km in one full range. The Halo boasts of an exciting looks and styling, a large tablet on the centre console that displays various car functions in real-time and doubles up as a multimedia player too. As per the manufacturers, the consumers can expect Halo to be a high performance sporty car with high-end features, safety systems, a host of advance "connectivity" features, user interfaces and high-performance drive trains and battery technologies at competitive prices.
Mahindra Reva and Formula E
Formula E car was showcased by Mahindra Reva, as a part of the Mahindra group in the 2014 Auto Expo at Delhi. Mahindra Reva team worked closely with the Mahindra Racing, the racing division of Mahindra Group, to get the Formula E cars ready for the Inaugural edition of Formula E World Championship which took place at Beijing in September 2014. Mahindra Racing Team is the only Indian team to race in Inaugural Formula E championship. Following a successful first ever Formula E race in Beijing, Mahindra Racing is exploring the possibility of bringing the electrically-powered car series to India in the 2016-2017 season.
Besides creating a mark on the global e-racing scene, the knowledge and technology from such Formula E cars will be used for commercial electric cars  with performance characteristics usually seen in cars with high-performance internal combustion engines 
- Government incentives for plug-in electric vehicles
- List of modern production plug-in electric vehicles
- List of production battery electric vehicles
- Mahindra Halo
- Mahindra REVA
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