How batteries are already changing the grid

By Cooper Katz McKim,

Darian Woods, Corey Bridges, Kate Concannon

Published January 13, 2025 at 8:54 AM EST

Renewable energy, when it comes to solar and wind power, has always had a caveat: it can only run when the wind blows or the sun shines. The idea of a battery was floated around to make renewables available 24/7. For years, it existed as an expensive, little-used technology. And then in 2021, it took off.

In California, there is now enough grid-scale battery storage to power millions of homes, at least for a few hours, and it's growing fast. How did that happen, and what does the newfound success mean for the grid?

This week, we dig into three stories about grid-scale battery storage. Today, we go on-the-ground to California, where batteries first took off in the U.S.

Related episodes:
Rooftop solar's dark side (Apple / Spotify)
How EV batteries tore apart Michigan (Update) (Apple / Spotify)
How China became solar royalty (Apple / Spotify)
Wind boom, wind bust (Two windicators) (Apple / Spotify)

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Cooper Katz McKim

Cooper Katz McKim is an Assistant Producer for NPR's daily economics podcast The Indicator from Planet Money. Before The Indicator, McKim reported at NPR Member stations in South Carolina and Wyoming. At Wyoming Public Radio, he filed stories with NPR's Environment And Energy Collaborative on bankruptcies, carbon capture and economic transition. He's won a national Edward R. Murrow Award for Best Use of Sound. More recently, he's served as a podcast producer at Sports Illustrated and the HISTORY Channel. He graduated from Tufts University and now resides in Denver, Colorado, where he spends his time mountain biking and playing jazz piano. [Copyright 2024 NPR]

Darian Woods

Darian Woods is a reporter and producer for The Indicator from Planet Money. He blends economics, journalism, and an ear for audio to tell stories that explain the global economy. He's reported on the time the world got together and solved a climate crisis, vaccine intellectual property explained through cake baking, and how Kit Kat bars reveal hidden economic forces.

See stories by Darian Woods

Corey Bridges

Corey Bridges is an assistant producer at NPR's daily economics podcast, The Indicator from Planet Money. Bridges enjoys covering stories ranging from public policy to the economics of sports. At The Indicator, he has worked on stories about how certain environmental regulations can impede climate progress and others about how college athletes are taking advantage of their name, image and likeness.

Kate Concannon

Kate Concannon is the Supervising Senior Editor at The Indicator from Planet Money. She leads this small, collaborative team of hosts, reporters and producers in making sense of crucial, but often complex and confusing, economic news in just 10 minutes a day.