Utility PG&E has asked the California Public Utilities Commission (CPUC) for approval of five large-scale battery projects, each with four-hours duration, that will take the investor-owned utility (IOU) past 1,000MW of battery energy storage in its service area.
A large-scale battery storage system will be built in Texas for the US’ biggest electric utility cooperative, to time-shift solar-generated loads and provide grid services to transmission operator ERCOT.
In the hierarchy of grid needs, peaking power is often a priority in terms of providing resiliency and balance to the network. This is usually provided by natural gas turbines, which come at a high environmental and economic cost. Andy Colthorpe charts the rise of the solar-plus-storage peaker plant.