California ISO Tests Flow Battery Tech that Could Decrease Bulk Storage Costs

The California Independent System Operator (CAISO) on April 30 said it has become one of the first wholesale power markets in the United States to connect a new and innovative battery storage technology to its grid. The four-year pilot project is intended to test and evaluate the performance of flow batteries in the commercial wholesale market. San Diego Gas & Electric, in coordination with Tokyo-based Sumitomo Electric, started testing a flow battery in 2015, according to CAISO, and the battery started participating in the ISO wholesale market in December.