Battery storage capacity averaged 70% growth over the last three years - https://www.eia.gov/todayinenergy/detail.php?id=67925
> During the first six months of 2026, operators added another 8.3 GW of battery storage capacity, reaching nearly 52 GW of nameplate battery storage capacity
This is the maximum amount of power it can dispatch. I think they use it intentionally so they can compare it to other generation sources.
For example this spreadsheet [1], with data for 2023, contains figures for "power capacity megawatts" and "energy capacity megawatthours".
1. https://www.eia.gov/analysis/studies/electricity/batterystor...
> In Q2 2026, battery energy stationary storage (BESS) installations reached 20.2 GWh
> total module manufacturing capacity to over 100 GWh.
> Storage Deployed in 2025: 57.6 GWh
Edit: although it looks like in recent days, fossil fuels reign supreme once the sun goes down. I guess we don't have enough batteries for the current heat wave
The market does not fix the administration forcing coal plants to stay open even when they are losing money.
The market does not fix the administration cancelling grants for clean energy projects and subsidies for electric cars, and adding tariffs to solar panel imports.
And US car manufacturers are enthusiastically moving away from their efficiency goals. That market is not moving quickly to renewables.