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) For sponsor-free episodes of The Indicator from Planet Money, subscribe to Planet Money+ via Apple Podcasts or at plus.npr.org. Fact-checking by Sierra Juarez. Music by Drop Electric. Find us: TikTok, Instagram, Facebook, Newsletter. Learn more about sponsor message choices: podcastchoices.com/adchoices NPR Privacy Policy

The online financial website Investopedia compiles an annual list of the top ten financial terms that drew the most interest from their audience. The 2024 list covers familiar concepts like inflation and tariffs, as well as more niche terms like moneyline bets and stock splits. Today, we visit the highlights of 2024 in economic terms. The 2024 Investopedia Terms of the Year Related episodes:The Indicator's bet on the Super Bowl How Trump's tariffs plan might workThe tower of NVIDIA For sponsor-free episodes of The Indicator from Planet Money, subscribe to Planet Money+ via Apple Podcasts or at plus.npr.org. Fact-checking by Sierra Juarez. Music by Drop Electric. Find us: TikTok, Instagram, Facebook, Newsletter. Learn more about sponsor message choices: podcastchoices.com/adchoices NPR Privacy Policy