India Could Power 90% of Grid With Solar and Batteries

India could power nearly its entire electricity grid with sunshine and batteries, according to groundbreaking new research that maps out a practical path to clean energy.

A study by energy think tank Ember finds that solar panels paired with battery storage could supply 90% of India's electricity demand at costs that already compete with traditional power sources. For a country of 1.4 billion people with rapidly growing energy needs, it's a potentially transformative discovery.

The math is surprisingly achievable. Meeting 90% of India's 2,000+ terawatt hours of annual demand would require about 930 gigawatts of solar capacity. That sounds massive, but it represents less than one third of India's available land suitable for ground-mounted solar panels.

India has already installed 143 gigawatts of solar as of February 2026, proving the technology works at scale. Solar now provides 9.4% of the country's electricity, up from just 5.3% three years ago.

The real breakthrough is how batteries solve solar's biggest limitation. During India's sunniest months from January through April, batteries can store daytime generation and release it after sunset, allowing the system to meet nearly 100% of demand on most days. Even during peak summer when air conditioning drives usage 10% above average, solar and storage could still cover 88% of needs.

The toughest challenge comes during monsoon season, when clouds reduce solar output for extended periods. That's where other clean sources like wind, hydro, and nuclear fill the gaps. The study found that pushing from 90% to 100% solar would become dramatically more expensive, requiring disproportionate amounts of panels and batteries for each additional percentage point.

The Ripple Effect

The impact varies beautifully across India's diverse regions. In the ten largest states, solar and storage could meet between 83% and 92% of electricity demand using the same system design. Andhra Pradesh leads at 92%, while Uttar Pradesh records 83%.

States with higher demand during sunny months perform best, while those needing more power during the monsoon show slightly lower potential. But even the lowest performing major state could still get more than four fifths of its electricity from solar and batteries.

The cost story makes this especially exciting. At 5.06 rupees per kilowatt hour, solar plus storage systems are already competitive in many of India's largest states. As battery prices continue falling globally, the economics will only improve.

India's solar revolution is already underway, with panels meeting up to one quarter of demand during peak daytime hours. This research shows the next chapter could be even more dramatic.

A nation of 1.4 billion people has a clear, affordable path to clean electricity within reach.