Gore Street Energy Storage Fund PLC (<a href="https://www.londonstockexchange.com/stock/GSF/gore-street-energy-storage-fund-plc/company-page" target="_blank">LON:GSF</a>) has attracted a subsidiary of Goldman Sachs Group Inc (<a href="https://www.nyse.com/quote/XNYS:GS" target="_blank">NYSE:GS</a>) as a customer for half of the capacity of its 200-MW Big Rock battery energy storage system (BESS) project in Imperial County, California, which is expected to be energised by December.