The US added a record 20.2 GWh of battery storage in just 3 months

https://electrek.co/2026/08/31/the-us-added-a-record-20-2-gwh-of-battery-storage-in-just-3-months/

37•ljf•1h ago

Comments

Synaesthesia•37m ago

Makes sense. With battery technology improving and being the cheapest it's ever been, why not? This is probably the direction most countries will go in the future.

walthamstow•32m ago

Presumably this is only capacity connected to the grid, and doesn't include isolated data centre builds?

origini•14m ago

I was snobby and looked up the numbers because I didn't think this is relevant. But it is.

Space-Tesla installed 3 GWh in 2026 alone.

Someone•9m ago

https://seia.org/research-resources/energy-storage-market-ou...:

- The utility-scale market continued underpin growth, with 18 GWh installed, largely supported by seven gigawatt scale projects. Arizona installed over 6.2 GWh of utility scale projects, the largest quarterly deployment for any state in history.

- In the BTM space, residential storage added 657 MWh and commercial and industrial (C&I) added 1.8 GWh, largely on the back of demand from data centers.

⇒ it includes data centers

Someone•11m ago

For comparison, US grid capacity is about 1250 GW, average usage 500 GW.

So, this adds over two minutes of average usage.

https://seia.org/research-resources/energy-storage-market-ou... says total storage now is about 200 GWh, or about 25 minutes of average demand.

bradfa•10m ago

I'm glad they're reporting it as the energy storage capacity and not the power output capacity. Too many news sites like to report the power output capacity in stories like these, which is horribly misleading, and then often they also frame it as though this is equivalent to adding actual power generation to the grid, which is even more misleading.

stymaar•9m ago

It's nice to see more storage being added, but we have keep thr order of magnitude in mind: the peak electricity demand for the US is 750GW, so the added storage for the past 3 month corresponds to just 96 seconds of peak consumption.

There's still a very long way to go !

seb1204•9m ago

Batteries are great but every country still needs generation to charge them up. Some of the big gentailers build very little new generation capacity.

jonatron•8m ago

Obviously there are a variety of sizes and configurations, but if you assumed 3.5MWh per 20ft container, that's 5771 containers, and if you assumed a PCS container per two battery container, that's 8656 containers, just for an idea of the scale.

universa1•6m ago

and then it's roughly just a rectangle of 100 by 100 containers, still big, but maybe not sooo big :-)

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