According to the ReNew Power website, Sinha founded the company in 2011 with a 25.2 MW wind project in Jasdan, Gujarat, and it has grown to become the country's largest independent renewable energy producer. According to the website, ReNew operates more than 100 utility-scale projects across eight states, generating 1% of India's electricity and assisting in the mitigation of 0.5 percent of India's carbon emissions.

History
Sumant Sinha founded ReNew Power in 2011 and received funding from Goldman Sachs in September. Goldman Sachs has invested $70 million in ReNew Power, while the Asian Development Bank (ADB) and alternative asset manager Global Environment Fund (GEF) have each invested $50 million and $20 million.

"If the market is supportive and the policy environment is favourable for renewable energy, we will conduct an initial public offering within a year or two," said Sumant Sinha, chairman and chief executive officer of ReNew Power. In May 2012, the company began work on its first project in Jasdan, Gujarat. In 2016, ReNew became the first renewable energy independent power producer to raise rupee-denominated masala bonds[10] and the first Indian renewable energy company to reach 1 GW capacity in the same year.

In 2016, ReNew Power established a centre of excellence at IIT to collaborate on research and technology development.
JERA (a joint venture between Tokyo Electric Power and Chubu Electric Power) acquired an equity stake in ReNew in 2017, and the company doubled its capacity for the third consecutive year. ReNew Power acquired Ostro Energy in 2018 and CPPIB, a Canadian pension fund, became an equity investor. Additionally, the company signed memorandums of understanding with the states of Andhra Pradesh and Maharashtra to invest in the renewable energy sector.