The US Energy Storage Monitor explores the breadth of the US energy storage market. This quarter's release includes an overview of updates in the US energy storage market, with new deployment data from Q4 2020. It includes key trend analysis for policy landscape, system price trends, VC investments, M&A, vendor activities and deployments across residential, non-residential and front-of-the-meter segments. The report culminates in a market outlook through 2025. Total US energy storage deployments hit 651.2 MW in Q4 2020, 37% more than in Q3 2020, which was the previous record quarter. 2,156 MWh of storage were deployed in Q4 2020, up 182% from Q3 2020 deployments. 3.5 GWh of storage were deployed in the US in 2020, an increase of 214% over the market’s 2019 additions.