Battery Storage Costs Now Viable for India to Harness 90% Solar Potential, Analysis Shows
Key Takeaways
- ▸Battery storage costs have become economically viable in India, with two consecutive years of sharp declines (40% in 2024, 31% in 2025)
- ▸Solar-plus-battery systems could meet 90% of India's electricity demand at INR 5.06/kWh ($56/MWh), competitive with conventional power costs
- ▸Only 930 GW of solar capacity is needed to meet 90% of India's demand—a small fraction of the country's available solar potential—combined with 2,560 GWh of storage
Summary
A new analysis from Ember demonstrates that battery storage costs have fallen dramatically enough to make solar-plus-battery systems economically competitive for meeting the vast majority of India's electricity demand. The research shows that solar paired with battery storage could reliably supply 90% of India's electricity demand at a levelized cost of electricity (LCOE) of INR 5.06/kWh ($56/MWh), a figure that is competitive with or cheaper than average power purchase costs across most Indian states.
The analysis reveals that achieving this 90% renewable electricity target would require 930 GW of solar capacity—a fraction of India's enormous solar potential—combined with 2,560 GWh of battery storage capacity. Recent battery cost improvements have been dramatic, with a 40% decline in 2024 followed by a 31% decline in 2025, fundamentally shifting the economics of renewable energy storage. India's ten largest states by electricity demand are particularly well-positioned to capitalize on this opportunity due to favorable demand patterns where peak electricity needs align with seasonal solar abundance.
Solar generation in India has already grown substantially, accounting for 9.4% of electricity generation in 2025 and reaching 143 GW of installed capacity, nearly doubling from 5.3% generation share in 2022. With battery storage costs now falling to globally competitive levels, India has the technical and economic tools to significantly expand solar's role beyond its current daytime peak contribution of up to 25% of demand, supporting the nation's broader decarbonization goals.
- India's demand patterns favor solar adoption, with peak electricity needs coinciding with higher solar radiation and lower demand during monsoon low-solar periods
Editorial Opinion
This analysis underscores a critical inflection point in global renewable energy economics: battery storage has finally become cheap enough to solve solar's fundamental intermittency challenge at scale. For a solar-rich country like India with massive electricity demand growth ahead, the combination of world-leading solar costs and plummeting battery prices creates an unprecedented opportunity to leapfrog fossil fuel-dependent infrastructure. The competitive LCOE figures suggest that India's path to deep decarbonization is not only environmentally necessary but increasingly the most economically rational choice.
