Battery Storage Costs Fall Sharply, Making Solar-Plus-Battery Systems Economically Viable for 90% of India's Power Demand
Key Takeaways
- ▸Solar-plus-battery storage can now meet 90% of India's electricity demand at competitive economics (INR 5.06/kWh), lower than most states' average power purchase costs
- ▸Battery storage costs fell 40% in 2024 and 31% in 2025, making round-the-clock solar electricity viable for the first time at scale
- ▸India would need 930 GW of solar capacity and 2,560 GWh of battery storage to achieve 90% demand coverage—a small fraction of the country's solar potential
Summary
According to analysis by Ember, battery storage costs have fallen dramatically in recent years, making solar-plus-battery systems economically competitive for meeting the vast majority of India's electricity demand. The research demonstrates that solar and battery storage could supply 90% of India's electricity needs at a levelized cost of electricity (LCOE) of INR 5.06/kWh ($56/MWh), lower than average power purchase costs in most Indian states. This would require 930 GW of solar capacity and 2,560 GWh of battery storage capacity—a fraction of India's enormous solar potential.
Battery economics have improved at an unprecedented pace, with turnkey battery costs falling 40% in 2024 and another 31% in 2025. These cost reductions transform intermittent daytime solar power into reliable around-the-clock electricity, addressing the long-standing challenge of nighttime supply and seasonal variations. Solar already accounts for 9.4% of India's electricity generation in 2025, nearly doubling from 5.3% in 2022, and the addition of cheap battery storage could unlock significantly larger contributions to India's power system.
- Solar's contribution to India's power mix has nearly doubled from 5.3% (2022) to 9.4% (2025), with battery storage positioning it for much larger future growth
Editorial Opinion
This analysis underscores a critical inflection point in the global energy transition: battery costs have finally fallen enough to make solar the dominant energy source even in regions without continuous sunlight. For India, which combines abundant solar resources with rapidly growing electricity demand, this represents a historic opportunity to leapfrog fossil fuel-based generation and build a clean energy system at lower cost than incumbent alternatives. However, realizing this potential will require substantial investment in both solar and battery infrastructure, grid modernization, and supportive policy frameworks.
