Costs of Big Batteries Are Tumbling and Can Boost Clean Power

Battery storage costs fell more than a quarter to a record low last year, improving the economics of projects to pair the equipment with renewables and which can help tackle curtailment of solar and wind.

The benchmark levelized cost of electricity for a standalone four-hour battery project declined 27% in 2025 from a year earlier to $78 per megawatt-hour and is expected to fall to $58 per megawatt-hour by 2035, BloombergNEF said in a report published Wednesday.