Building bridges: On India's solar generation, battery storage

📌 Summary:

• India set record peak demand of 256.1 GW on April 25, 2026; solar contributed 21.5% of afternoon load — an all-time high
• Full-day accounting reveals the gap: solar provided only 10.8% of 24-hour generation and just 0.1% of evening electricity needs
• Solar capacity share has nearly doubled from ~15% (2022) to ~28% of installed capacity (early 2026), but generation share rose only from 5.6% to 10.8% — showing installed capacity ≠ reliable generation
• Core bottleneck identified: Battery Energy Storage Systems (BESS) — without storage, solar electrons go to waste after sunset
• India has ambitious 500 GW renewable target by 2030, but current BESS deployment remains far below required scale
• Daytime solar curtailment already occurring in high-solar states like Rajasthan and Gujarat due to grid saturation
• Editorial calls for: mandatory BESS co-location with new solar projects; favourable tariff structures for storage; viability gap funding for grid-scale batteries
• PLI scheme for BESS cells must be accelerated; India needs to build domestic battery manufacturing capacity to reduce import dependence
• Comparison: California and Germany demonstrate that solar surpluses without storage lead to grid instability and negative pricing episodes