Long-Duration Utility-Scale BESS Project Cost Drops to $125/kWh: Ember

Levelized cost of storage for large, contracted projects is $65/MWh

December 12, 2025

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The capital cost for long-duration (4 hours or more) utility-scale battery energy storage systems (BESS) in markets outside China and the U.S. reached roughly $125/kWh by October 2025, according to a recent report by Ember.

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Arjun Joshi

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Long-Duration Utility-Scale BESS Project Cost Drops to $125/kWh: Ember

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