Vatra Insights

Energy, explained.

Understand the changing grid, the technology behind it, and what it means for your future.

Battery Storage

Why batteries are changing the electricity market

Storing electricity is not new, but until recently it mostly meant pumping water uphill, and only some places have the hills. Batteries do not need the elevation — and in 2025 the US battery fleet was rated at nearly twice the capacity of its pumped-storage fleet.

7 min read

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What we cover

Five subjects, chosen because they are what people actually ask about when their electricity bill changes.

How these are written

Every article here is sourced from public, independently checkable data — federal statistical agencies, national laboratories, regulators and grid operators — and each one lists what it used, with the date we read it. Where something is our reading of the evidence rather than the evidence itself, the article says so under its own heading, and where a figure is simply not knowable from public sources it says that too. How Vatra evaluates a decision.

Nothing here is a recommendation about your own home, and no figure on these pages is a forecast of anybody's bill.