A dramatic decline in solar photovoltaic module prices — falling from over ₹200 per watt in 2010 to under ₹9 in 2024 — is powering India toward a game-changing clean energy future. New research from the India Energy & Climate Center (IECC) at the University of California, Berkeley, calls this drop more than a technological breakthrough — it’s a national energy tipping point.
Solar-Plus-Storage Now Cheaper Than Coal
The IECC study, Plummeting Solar+Storage Auction Prices in India Unlock Affordable, Inflation-Proof 24/7 Clean Power, shows that India can now generate and store solar electricity around the clock for less than the cost of most new coal-fired power projects. Solar-plus-storage systems are capable of delivering electricity with more than 95% availability at prices under ₹6 per kilowatt-hour (kWh).
In recent auctions, solar-plus-storage bids came in between ₹3.1 and ₹3.5 per kWh — a record low. Standalone battery storage bids dropped to ₹2.8 lakh per megawatt (MW) per month.
Round-the-Clock Clean Energy at Competitive Rates
By integrating solar generation and storage, researchers found that consistent 24/7 electricity — or a “flat block” of clean power — can now be supplied at ₹4 to ₹4.3 per kWh. Even with backup to ensure full reliability, the cost stays under ₹4.7 per kWh — far below the average industrial tariff of ₹7.9 per kWh. The pricing revolution is not just about solar panels. Rapid advancements in battery technology, especially lithium-ion storage, have played a pivotal role.
Battery Innovation Strengthens Economics
Lithium-ion battery pack prices have declined from ₹13,860 per kWh in 2020 to ₹8,388 in 2024. Their durability has also improved dramatically, with lifespans now reaching up to 15,000 cycles without performance loss. Co-locating solar and battery installations at the same site cuts infrastructure costs further, making the solar-plus-storage model even more attractive for investors and utilities alike.
India Positioned as Global Energy Storage Hub
India is already on track to develop 200 gigawatt-hours of battery manufacturing capacity — positioning the country as a global leader in energy storage, just as it did with solar panel deployment over the last decade.
This shift could significantly impact the future of coal in India. The report suggests that new coal power plants — with only 85% average availability — may soon become financially unviable when compared to solar-plus-storage systems that can achieve 95–100% uptime with minimal backup.
Scalable, Fast, and Inflation-Proof Power for Industry
Unlike coal infrastructure, solar-plus-storage systems are modular and can be scaled and deployed quickly — a major advantage for fast-growing industrial and commercial power consumers.
In addition to affordability, solar-plus-storage offers price stability. While industrial tariffs have historically increased with inflation and vary widely across states, clean power backed by storage provides a consistent long-term rate.
Even after including transmission charges of up to ₹1 per kWh, solar-plus-storage remains significantly cheaper than prevailing industrial tariffs in many regions.
Challenges Ahead, But Economics Are Clear
The IECC study does note that regional planning will be essential to address grid constraints and solar variability. However, the economic case is already compelling — and growing stronger. As reported by downtoearth.org, India stands at the edge of a clean energy revolution, fuelled by falling costs, advancing technologies, and the growing economic appeal of solar-plus-storage systems.
