An SDG&E employee walks in front of four of battery units in Escondido. Photo by Chris Jennewein

San Diego Gas & Electric‘s clean energy strategy is advancing with contracts for five new battery facilities in the San Diego area providing a total of 84 megawatts of backup storage.

The five lithium-ion battery energy storage facilities will be built by SDG&E and its partners in Miramar, Escondido, Poway and San Juan Capistrano.

The announcement on Wednesday follows the opening in February of the world’s largest lithium-ion backup facility in Escondido.

“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,” said Emily Shults, SDG&E’s vice president of energy procurement. “By building these projects, SDG&E will remain at the forefront of helping the state achieve its bold clean-energy and carbon-emission targets.”

All five of the battery projects can store electricity from solar, wind and other clean sources and release it when energy is in high demand. They will come online between late 2019 and late 2021.

The California Public Utilities Commission has set 2020 targets for energy storage, including 165 megawatts for SDG&E’s service area. The utility said it is on track to meet this goal.

Chris Jennewein is founder and senior editor of Times of San Diego.