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U.S. battery storage installations rose 29% last year, driven by strong utility-scale growth in Arizona and Texas, per new data from the Solar Energy Industries Association and Benchmark Mineral Intelligence.

Why it matters: Storage is a flexible resource that helps meet demand peaks and enables higher levels of renewables on grids.

The intrigue: While utility-scale storage is by far the biggest market right now, behind-the-meter (BTM) installations generating or storing electricity for on-site use are growing too — and data centers are increasingly a reason.