Both the CAISO and ERCOT battery fleets reached new peak dispatch levels last Monday, October 7^th. For CAISO, the new maximum output is 8.4 GW while ERCOT’s fleet development remains a few years behind. The ERCOT fleet peaked at 4.0 GW. For both, the new records just barely surpassed the old ones, moving up around 100 MW. The figure below displays each fleet’s running maximum output for 2024. This time of year, dispatch growth tends to be more stagnant while the spring and summer typically offer more capacity growth and times of scarcity that lead to broken dispatch records. In this report, we’ll check in on the growing capacity levels for both fleets, as well as the conditions of the day that lead to the record-breaking dispatch.

Figure 1 | Running Maximum Dispatch from the CAISO and ERCOT Battery Fleets