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|Headquarters||One Earth, Hadapsar,, Pune, Maharashtra, India|
|Revenue||₹204.0286 billion (US$2.8 billion) (2014)|
Suzlon Energy Ltd. is a wind turbine supplier based in Pune, India. Formerly ranked by MAKE as the world's fifth largest wind turbine supplier, it has since dropped out of the Global top ten rankings (as of 2014) due to extensive losses and inability to repay debts. The company's website claims to have over 17,000 MW of wind energy capacity installed globally, with operations across 18 countries and a workforce of over 8,000. In 2016, the company finally posted a profit EBITDA after losses over seven consecutive years.
The company is listed on the National Stock Exchange of India (NSE:SUZLONEQ) and on the Bombay Stock Exchange (BSE:532667). Though once considered a favourable stock, and a favourite of the stock broker Rakesh Jhunjhunwala, it fell out of favour as the company posted continuous losses. It fell from a high of Rs. 68.75 in 2010 to a low of Rs. 18.5 in 2014, with a single day drop of 10% in September 2014. It continues to trade low at less than Rs. 17 per share in 2018.
Suzlon is a vertically integrated wind power company. It makes and installs wind turbines, and manufactures blades, generators, panels, and towers in-house. It is integrated downstream and delivers turnkey projects through its project management and installation consultancy, and operations & maintenance services. Suzlon has offices, R&D and technology centres, manufacturing facilities and service support centres spread across the globe, with its head office in Pune, India.The company's larger offices, design and R&D teams are located in India, Germany, Denmark and The Netherlands. As per its website, Suzlon has fifteen manufacturing facilities and a workforce of over 8,000 employees globally.
In 1995, founder Tulsi Tanti was managing a 20-employee textile company. Due to the erratic availability of power locally, and its rising costs, the highest business expenditure after the raw materials was electricity. The cost of electricity also offset any profits made by the company. After providing electricity for his own company, Tanti moved into wind energy production as a way to secure the textile company's energy needs, and founded Suzlon Energy. Suzlon adopted a business model wherein clients would be responsible for 25% of the up-front capital investment and Suzlon would arrange the remaining 75% on loan. Initially, banks were hesitant to fund loans for this model, but by 2008, many Indian banks started financing wind power projects for Suzlon clients.
In 2001, Tanti sold off the textile business; Suzlon is still actively run by Tulsi Tanti, now in the role of Chairman, Suzlon Group.
In the year 2006, Suzlon reached a definitive agreement for acquisition of Belgium firm Hansen Transmissions, specializing in gearboxes for wind turbines, for $565 million. In 2007, the company purchased a controlling stake in Germany's Senvion (then operating as REpower Systems) which valued the firm at US$1.6 billion.
In June 2007, Suzlon had signed a contract with Edison Mission Energy (EME) of US for delivery of 150 wind turbines of 2.1 megawatts in 2008 and a similar volume to be delivered in 2009. EME had an option not to purchase the 150 turbines due to be delivered in 2009, which it has chosen to exercise.
In November 2009, the company decided to sell 35% stake of Hansen for $370 million as part of its debt restructuring program, through placing new shares. It appointed Bank of America Merrill Lynch and Morgan Stanley as the managers and book runners for the same.
In May 2011, Suzlon announced returning to profitability after the financial crisis of 2009 
In October 2011, Suzlon sold its remaining 26.06% stake in Hansen Transmissions International NV to ZF Friedrichshafen AG for ₹8.9 billion (US$120 million).  In the same month, it also achieved full control of its German subsidiary REpower Systems (now Senvion) by acquiring the remaining 5% stake held by minority shareholders that resisted the takeover. The takeover was completed through the squeeze-out procedure by paying EUR 63 Million. 
It has to redeem 500 million worth of FCCB's (foreign currency convertible bonds) in 2012 in tranches of 300 million in June and 200 million in October respectively. In line with the previously announced strategy to dispose of non-critical group assets to reduce long-term debt, Suzlon Chairman said that Suzlon Energy, will sell stake in its China manufacturing unit to China Power New Energy Development Company Limited for 3.4 billion rupees ($60 million).
On 30 November 2013 the Suzlon Group subsidiary REpower Systems (now Senvion SE) won an Engineering, Procurement and Construction (EPC) contract from Mitsui & Co (Australia) Ltd to deliver 52 wind turbines with a total rated output of 106.6 MW for the Bald Hills wind farm in Victoria, Australia.
As of August 2014, Suzlon's debt was over ₹ 8000 crores. On 22 January 2015, Suzlon announced the sale of Senvion SE, its wholly owned subsidiary, to Centerbridge Partners, a private equity firm in a deal valued at ₹ 7200 crores. The deal is expected to ease Suzlon's debt burden. In a further equity infusion, Dilip Shanghvi Family and Associates (DSA), run by Dilip Shanghvi, the founder and managing directory of Sun Pharmaceutical, agreed to purchase a 23 percent stake in Suzlon for a sum of ₹1800 crores. The deal will see Tanti's holding shrink to 24 percent, but management control will still remain with the Tanti family. Its total borrowings stood at Rs 11430.76 crore in FY16 from Rs 17810.96 crore FY15.
On 17 January 2017, Suzlon Energy achieved 10,000 megawatts installed wind energy milestone in India. Suzlon's 10,000 MW of wind installation is capable of powering over 5 million households per annum and offsets approximately 21.5 million tonnes of carbon dioxide (CO2) emission annually which is equivalent to planting over 1500 million trees.
Globally, Suzlon has installed over 17000 MW of wind power capacity in 18 countries.
Suzlon crossed 11,000 megawatts of cumulative installations in India. Suzlon has cumulatively added over 11000 megawatts of wind power capacity for over 1,700 customers in India across 40 sites in eight States. Suzlon accounts for nearly one-third of the country's total wind installations.
Its notable installations in India include:
- The 1064 MW Jaisalmer Wind Park in Rajasthan.
- The 1100 MW wind park in the Kutch district, Gujarat, with plans to expand it to 2000 MW in the next four to six years. As of February 2015, this is the largest wind park in Asia at a single location.
- A 584 MW wind park in the Eastern Ghats, (Tamil Nadu).
- The 210 MW Vankusawade Wind Park near the Koyna reservoir in the Satara district of Maharashtra.
- List of renewable energy companies by stock exchange
- List of wind turbine manufacturers
- Wind power in India
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