The costs of solar storage have declined significantly in the last decade, and long-term, improving technology and efficiency should help continue to make storage more affordable.
How much does a solar photovoltaic cost?
We find that solar photovoltaics in combination with lithium-ion battery at the residential (0.39 to 0.77 EUR/kWh) and utility scale (0.17 to 0.36 EUR/kWh) as well as with pumped hydro storage at the bulk scale (0.13 to 0.18 EUR/kWh) offer the lowest levelized costs.
Are PV and storage more affordable?
“With similar reductions in hardware costs for storage systems, PV and storage have become vastly more affordable energy resources across the nation.” This year's benchmark report integrates PV-plus-storage costs, demonstrating that these also fell from the first quarter of 2019 to the first quarter of 2020.
With the falling costs of solar PV and wind power technologies, the focus is increasingly moving to the next stage of the energy transition and an energy systems approach, where energy storage can help integrate higher shares of solar and wind power.
How much does a PV system cost?
A decade ago, the module alone cost around $2.50 per watt, and now an entire utility-scale PV system costs around $1 per watt,” said NREL Senior Financial Analyst David Feldman. “With similar reductions in hardware costs for storage systems, PV and storage have become vastly more affordable energy resources across the nation.”
The study focuses on solar and battery storage, but the researchers note that wind power, heat pumps, and other clean technologies are also seeing a sharp drop in prices, too. Technological advances are making solar and battery storage smarter and more efficient.
The thermal energy storage system is the main driver for the high flexibility of CSP systems. Primarily due to the stochasticity of the solar resource, CSP plants without storage operate with capacity factors in the range of 22–28 %, depending on technology and location .