Residential solar systems surge 200% in size, with California leading in storage pairings, report reveals.

Lawrence Berkeley National Laboratory’s annual Tracking the Sun report has found that the median size of residential solar systems median size has risen 200%, with storage pairings rising from zero in 2015 to 10% in 2022. California is dominating the market, with 11% of those systems having attached storage and 23% retrofitted on. Prices for standalone solar installations have fallen by roughly $0.4/W per year, but price declines “tapered off” beginning in 2013 and began to average $ 0.1-0.2 per year since then. Texas continues to be a market with “particularly high levels of activity” when it comes to residential solar installations, and CenterPoint Energy saw interconnection applications for solar plus storage systems triple last year. Installed pricing data also exhibits “substantial variability” across projects, as the result of differences in project-level characteristics, installer attributes, and features of the local market, policy, and regulatory environment. The report also noted that there is room for growth in the commercial and industrial sector for battery pairing.