The Problem of Too Much Sun
It sounds counterintuitive, but there can be such a thing as too much solar power at the wrong time. Solar panels generate the most electricity around midday, when the sun is strongest. However, this is often when household and commercial demand isn't
at its peak. The national grid, a complex network designed for stable power sources, struggles to absorb these massive, sudden influxes of solar energy. When generation far exceeds what the grid can safely handle or what consumers are using, system operators are forced to ask solar farms to reduce their output. This process, known as 'curtailment', means that perfectly good, clean electricity is intentionally wasted. In the first half of 2026 alone, India reportedly curtailed thousands of million units of solar power.
An Old Grid for a New Era
India's electricity grid was engineered for a different time. It was built around large, centralised thermal power plants that produce a consistent, predictable amount of energy around the clock. These plants have a physical 'inertia' from their spinning turbines that helps keep the grid stable. Solar power, on the other hand, is variable and decentralised. Its output fluctuates with the weather and time of day. This creates a mismatch known as the 'duck curve', where a midday dip in demand from the grid (as solar takes over) is followed by a steep ramp-up in the evening when the sun sets and everyone gets home. Managing these sharp swings puts immense strain on the grid, which wasn't designed for such flexibility. Between January 2022 and June 2025, India saw 68 major grid disturbances in renewable energy complexes, highlighting these growing pains.
The Transmission Traffic Jam
Generating power is only half the battle; getting it to where it's needed is the other. A significant portion of India's solar capacity is concentrated in a few states like Rajasthan and Gujarat. While these regions are ideal for solar generation, the transmission infrastructure—the 'highways' of electricity—is not always robust enough to carry all that power to high-demand states. This creates bottlenecks, much like traffic jams on a highway, forcing curtailment because the energy has nowhere to go. India has met only about 80% of its annual transmission targets over the past five years, leading to delays in connecting new renewable projects to the grid. These transmission and distribution (T&D) losses are higher than the global average, meaning a share of electricity is lost before it ever reaches a home.
The Missing Piece: Storage
The ultimate solution to solar's intermittency is storage. Battery Energy Storage Systems (BESS) can act like giant rechargeable batteries for the grid. They can soak up all the excess solar power generated during sunny afternoons and release it during the evening peak, when demand is highest and solar output is zero. This smooths out the 'duck curve' and ensures a reliable, 24/7 supply of clean energy. The main hurdle has been cost. However, prices are falling, and the government is pushing policies to accelerate adoption. The Central Electricity Authority (CEA) has even proposed making co-located energy storage mandatory for new solar and wind projects commissioned after July 2027, a clear signal that storage is now central to India's energy strategy.
