The Energy Storage Report 2024

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US reached 12.7GW of BESS in Q2 but no ERCOT additions, says S&P


Total installed battery storage capacity in the US reached 12.689GW by the end of the second quarter, S&P has said.

Some 1.931 GW of grid-scale battery storage capacity was added during the second quarter (April-June), 18% higher than in Q1, S&P Global Commodity Insights said. Its data includes facilities beginning commercial operation of being synchronised to the grid.

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It means that by the end of June the US reached 12,689MW of installed battery storage by power and 36,903MWh of energy storage capacity. Its data does not appear to include distributed or behind-the-meter projects.

Interestingly, after leading the US for deployments in Q1 as per its own figures, S&P’s data shows that the ERCOT, Texas market saw no grid-scale additions in Q2.

California instead lead the way with 60% of additions, or 1,123MW. Together with other western states forming the Western Electricity Coordinating Council (WECC) which collectively added 709MW, the West US accounted for the vast majority of Q2’s deployments.

The largest project to have come online in Q2 was the Moss Landing extension while projects from De Shaw, Clearway and RWE Clean Energy (2) made up the rest of the list.

S&P said that 3.5GW is expected to come online in the current, third quarter, based on projected commercial operation dates (COD). CAISO is set to deploy 2GW, WECC 843MW and ERCOT is expected to add 400MW and New York another 113MW.

S&P’s figures for Q2 were slightly higher than those from American Clean Power Association (ACP) which pegged large-scale additions at around 1.5GW.

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