Yes, with an honest caveat: the anchor figures are the EIA's own published capacity numbers, and quarters between anchors are interpolated. The footnote on screen says it's curated from EIA data, not a live feed.

Does it update automatically?

No. The series is baked into the saver and updated by hand when the EIA publishes new figures, so it's always slightly behind the very latest release.

Does it work offline?

Yes. The data is embedded, so there's no network fetch at all — it runs entirely offline.

Yes — free, no download, no key, in your browser. ESC exits.

Is this power or energy capacity?

Power capacity, in gigawatts — the maximum instantaneous output. Energy capacity (gigawatt-hours) runs higher still, since most grid batteries store several hours of output.

Grid Battery Storage Growth Screensaver

The Grid Battery Storage Growth screensaver draws cumulative US utility-scale battery power capacity as ascending quarterly bars, curated from the EIA's published figures — from under 2 GW in early 2021 to about 41 GW by the end of 2025. It's free, works fully offline, and ESC exits.

How the Grid Battery Storage Growth screensaver works

A real quarterly series of cumulative US utility-scale battery capacity (GW) is embedded in the saver, anchored to figures the EIA has published — Form EIA-860M reporting and its Today in Energy articles.

Quarters between published anchor values are interpolated, and the series is refreshed by hand when new EIA releases land — the on-screen footnote says exactly that.

The bars ease upward in a staggered sweep when the saver starts, brightening toward the newest quarter.

The headline shows the latest cumulative GW and the year-over-year jump — recently around +15 GW yr/yr.

A worked example

At the full 20-quarter window the shape tells the story on its own: bars crawl through 2021–22, bend upward through 2023, then leap as the fleet grows from 26.3 GW at end-2024 to about 41 GW a year later. Run it beside the Day-Ahead Power Price Curve in Multi-view to see why midday prices keep going negative.

Settings & tips

Quarters shown — how much history to draw, from the last 8 quarters to the full series back to 2021.

Frequently asked questions

Is this real data?: Yes, with an honest caveat: the anchor figures are the EIA's own published capacity numbers, and quarters between anchors are interpolated. The footnote on screen says it's curated from EIA data, not a live feed.
Does it update automatically?: No. The series is baked into the saver and updated by hand when the EIA publishes new figures, so it's always slightly behind the very latest release.
Does it work offline?: Yes. The data is embedded, so there's no network fetch at all — it runs entirely offline.
Is it free?: Yes — free, no download, no key, in your browser. ESC exits.
Is this power or energy capacity?: Power capacity, in gigawatts — the maximum instantaneous output. Energy capacity (gigawatt-hours) runs higher still, since most grid batteries store several hours of output.

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