A carbon-free battery storage demonstration project at a San Diego Gas & Electric substation in Bonita successfully completed a pair of recent tests on a microgrid — and that could mean some welcome news for utility customers having to cope with power outages. “This is important because this was a purely renewable microgrid operation,” said SDG&E distributed energy resources manager Laurence Abcede. “And it actually demonstrates how we’re able to respond to renewable variability in the field.”
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The tests were part of a joint project between SDG&E and Japan’s Sumitomo Electric Industries that used vanadium redox flow batteries to power a microgrid — energy systems that can disconnect from the…