China’s Batteries Move Beyond Capacity Scale-up: Utility-Scale Storage Could Have Shifted 23 TWh More Clean Power in 2025

China has built the world's largest fleet of grid-scale batteries, but new analysis finds much of it is underused. In December 2025 alone, China added more battery storage than the United States installed all year, and by early 2026 the country had almost 150 GW of lithium-ion battery storage. Officials just raised the 2030 target for this storage to 300 GW. But the analysis finds these batteries could have shifted 23 more terawatt-hours of clean electricity in 2025 if they'd been run harder — enough to power Singapore for five months.

The gap comes down to how batteries are used. Many were built alongside wind and solar farms under a since-ended rule requiring co-located storage, and these batteries run on fairly rigid schedules, can't trade independently in power markets, and get cycled less often. Standalone batteries, dispatched directly by the grid, run far more and now make up the bulk of new installations. China has been loosening rules to let standalone storage earn revenue, but weak market pricing and price caps still limit how much money batteries can make from storing power when it's cheap and selling it back when it's needed.

None of this changes anything for a homeowner's own equipment or rebates. It's a signal about where the world's biggest battery market is headed: past the initial building boom and into the harder work of making that storage actually useful to the grid, which is a preview of questions battery storage everywhere, including in the US, will eventually face.