A 2023 DOE report estimated that the US would need 225–460 GW of long-duration energy storage—defined in the report as 10–160 h of battery duration—to build a fully decarbonized electricity grid by 2060. LPO can finance short and long duration energy storage projects to increase flexibility, stability, resilience, and reliability on a renewables-heavy grid. Why Energy Storage? Energy storage serves important grid functions, including time-shifting energy across hours, days, weeks, or months;. The company says the batteries, capable of storing energy for days, will help make a grid powered by renewable energy more reliable. Credit: Form Energy Over the past few years, lithium-ion batteries emerged as the default choice for storing renewable energy on the electrical grid.