U.S. residential energy storage market has biggest installation quarter yet

The US energy storage market set a new record in the fourth quarter of 2021, with new system installations totaling 4,727 MWh.

Credit: SunCommon

According to Wood Mackenzie, a Verisk business, and the American Clean Power Association’s (ACP) latest “US Energy Storage Monitor” reportQ4 2021 saw more capacity installed than in the first three quarters combined, despite project delays.

Residential storage had its strongest quarter to date with 123 MW installed, beating the previous quarterly record of 110 MW in Q1 2021. Increasingly effective solar + storage sales in markets outside of California helped establish the new quarterly benchmark and resulted in a national annual total of 436MW.

By 2026, annual installations in the residential segment are expected to hit 2 GW/5.4 GWh, with frontrunners in California, Puerto Rico, Texas, and Florida leading that market segment.

“Puerto Rico’s position in the residential US solar + storage market comes as no surprise and demonstrates how outages can drive battery adoption, with thousands of new residential installs emerging each quarter and competition increasing between local installers,” said Chloe Holdenan analyst with Wood Mackenzie’s energy storage team.

Annual deployments of grid-scale storage nearly tripled year-over-year to 3 GW/9.2 GWh. Despite a record year, the grid-scale market didn’t meet expectations in 2021, with supply chain challenges delaying more than 2 GW of capacity into 2022 and 2023. Wood Mackenzie forecasts that supply chain pressures and delays within interconnection queue processing will persist through 2024.

“Even in the face of continued macro-economic headwinds, interconnection delays, and lack of proactive federal policy, increasing demand for resilient clean energy and volatility in the price of fuel-based generation will drive energy storage deployment forward,” said Jason Burwen, VP for energy storage at American Clean Power.

System component price gains experienced over recent years have nearly been wiped out by higher costs for raw materials and transportation. Specifically, battery module pricing saw the largest increase of all system components due to the increased cost of raw materials.

The non-residential storage segment delivered 131 MWh in the fourth quarter resulting in 162 MW/350 MWh of total annual deployments in 2021. Segment demand was driven by increased storage attachment rates within the community solar markets of New York and Massachusetts.

News item from WoodMac

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