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SDG&E signs contracts for 83.5 MW more battery storage

The Southern California utility is going for more lithium-ion batteries, including the world’s largest battery system, to accommodate its leading portion of renewable energy.

AES will install a 40 MW/160 MWh system which is larger than any battery deployed to date.

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.

SDG&E will own and operate these first two large systems. The final three storage projects will be owned by third parties and located in Escondido, Poway and San Juan Capistrano.

In addition to the five battery systems, SDG&E has signed a contract for a 4.5 MW demand-response system. All six contracts now go to the California Public Utilities Commission for approval.

According to an SDG&E press statement, the purpose of the six systems is to help incorporate more solar and wind into the grid by storing power at times of high renewable energy output and releasing it when output is low. “These projects will add more flexibility to the system and help us to ensure reliability while providing greater levels of clean energy to all of our local communities,” stated Emily Shults, SDG&E’s VP of energy procurement.

Read full article at PV Magazine