San Diego Gas and Electric Co. (SDG&E) recently completed a four-year zero-emissions microgrid pilot project testing a vanadium redox flow battery (RFB) from Sumitomo Electric Industries Ltd. (SEI). 

SDG&E Service Area & Historical Wildfires

The microgrid project, completed late last year, tested the RFB’s ability to seamlessly transition from the larger grid to the microgrid without any power interruption. The RFB was also able to provide electricity after customers experienced a momentary outage before they were transitioned to the microgrid, which operated completely independent of the larger power grid. 

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