Published: 1 Apr 2021, 11:23 By: Deputy Editor Sonnen's battery storage with Solaria's PV panels in Utah, a VPP project that benefits from the ITC. Image: Andy Colthorpe / Solar Media. The market for solar-plus-storage in the US has grown dramatically in recent years, with more than 1GW already. Additionally, there is more than 100GW in connection queues, explained Will Gorman, a researcher at the Electricity Markets and Policy Department at Lawrence Berkeley National Laboratory in a panel discussion at the Energy Storage Summit USA, hosted by our publisher Solar Media. Of all the proposed solar projects in the US currently, he continued, 34% are paired with a battery as of the end of 2020, and within California this jumps to 90%.