West Ford Flat Battery Storage

Having reached commercial operations in Q3 2024, the West Ford Flat Energy Storage (“WFFES”) is a 25-megawatt (MW) battery energy storage system (“BESS”) on the repurposed West Ford Flat geothermal facility at The Geysers. 

WFFES uses lithium-ion battery technology to store electricity (charge mode) at times of excess generation and/or low demand and then delivers electricity (discharge mode) back to the grid for use in periods of high demand.

The BESS has a 4-hour discharge capability resulting in the ability to discharge a total of 100 megawatt-hours. In addition, WFFES can provide other services such as regulating voltage for protection of the grid.