A worker controls batteries in an electricity storage container on Sept. 29, 2020 in Fontenelle near Dijon in France. Credit: Philippe Desmazes/AFP via Getty Images Just five years ago, a 20 megawatt battery storage project was considered big. Now a 300 megawatt project, the largest in the world, has gone online in California, and even bigger battery projects are coming in 2021. Battery storage has entered a new phase of rapid growth, brought on by falling prices for lithium-ion batteries and rising demand for electricity sources that can fill in the gaps in a grid that is increasingly fueled by wind and solar. High demand is leading to a boom in investment in battery companies, and fevered speculation about new kinds of batteries. We deliver climate news to your inbox like nobody else. Every day or once a week, our original stories and digest of the web’s top headlines deliver the full story, for free. Battery storage is a crucial part of the transition to clean energy because of the way it can store power from intermittent sources for use at other times, providing a cleaner and less expensive alternative to natural gas power plants. And 2021 is shaping […]

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