India's Solar Demand and Capacity Challenges

Energy Demand and Solar Power in India: Key Points

1. Record Peak Demand:

   • On April 25, 2026, India recorded a peak electricity demand of 256.1 GW.

2. Solar Contribution:

   • Solar plants supplied 21.5% of the afternoon electricity load, a historic high.
   • For the entire day, solar energy accounted for only 10.8% of total electricity generation, highlighting reliance on solar power is limited post-sunset.
   • In comparison, solar's contribution to peak demand generation in 2022 was just 5.6%.

3. Installed Capacity Growth:

   • Solar's share in India’s installed electric capacity increased from 15% in 2022 to approximately 28% by early 2026.

4. Storage and Stability Challenges:

   • Current bottlenecks arise from inadequate battery storage solutions, leading to states halting solar supply during peak production to maintain grid stability.
   • India curtailed 2.3 terawatt-hours (TWh) of solar generation between late May and December 2025, which is about 18% of solar output.
   • In October 2025 alone, 0.9 TWh were wasted due to supply issues.

5. Economic Concerns:

   • The inability to utilize stored energy results in financial burdens on the public exchequer, compensating producers for unutilized power.

6. Monsoon Forecast:

   • The India Meteorological Department forecasted a below-normal monsoon at 92% of the Long Period Average, posing risks to solar power output and grid power stability during hotter, drier summers.

7. Battery Storage Economics:

   • Battery storage tariffs for standalone two-hour services dropped from ₹2.21 lakh per MW per month in early 2025 to ₹1.48 lakh by year-end.
   • By end-2025, only 0.7 GWh of battery storage was operational, with projections of an additional 2 GWh by December 2026.

8. Policy Recommendations:

   • There is a pressing need for the Centre and States to focus on executing co-located battery storage for solar projects, linking every solar auction with mandatory storage provisions.
   • Addressing financing challenges for low-tariff projects is critical to enhance solar and grid stability.

This information underscores India's progress in solar energy development along with the persistent challenges in storage and infrastructure that need addressing to capitalize on solar potential and ensure grid reliability.