Energy storage that lasts for hours, or even days, is crucial to provide round-the-clock renewable power. It's also an opportunity for rivals to challenge China's grip on clean technology https://www.bloomberg.com/news/articles/2026-04-21/us-can-compete-with-china-on-batteries-for-long-duration-energy-storage?taid=69e74b611045c000015b6e45&utm_campaign=trueanthem&utm_content=business&utm_medium=social&utm_source=twitter