“Energy storage is actually the true bridge to a clean-energy future,” says Bernadette Del Chiaro, executive director of the California Solar and Storage Association. Kelly Speakes-Backman, CEO of the U.S. Energy Storage Association, says that battery storage additions doubled in 2020, and would likely have tripled had it not been for construction slowdowns caused by the Covid-19 pandemic. Energy storage development in Europe has been hindered by a restrictive electricity market dominated by government auctions that tend to undervalue storage. Adding storage also makes renewable energy more profitable, says Wesley Cole, an energy analyst with the National Renewable Energy Laboratory. While energy storage is thriving in high-value markets, such as California, battery prices still need to come down more to reach large-scale global deployment.