San Diego Gas & Electric Company (SDG&E) is going big into energy storage. In late January the world's largest battery system was put online it in its service area, a 30 megawatt (MW)/120 megawatt-hour system (MWh) in Escondido. But SDG&E was not finished. Yesterday the utility signed contracts to for another 40 MW battery, a 30 MW battery system, and three projects totaling 13.5 MW.
SDG&E says these systems will complete its obligations under targets set by state regulators in response to AB 2514, which mandated the deployment of energy storage by the state's largest utilities. The five systems are expected to come online between December 2019 and the end of 2021.
All five of the new battery systems which SDG&E has contracted use lithium-ion technology, and all four will have four-hour ratings. The 40 MW/160 MWh system will be installed by AES, which commissioned what is currently the world's largest system in Escondido, and the 30 MW/120 MWh system will be built in Miramar by Renewable Energy Systems Americas.
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