Hummingbird Energy Storage :: Part of Landmark Procurement to Replace Natural Gas
Technology Lithium ion battery energy storage
Capacity 75 MW / 300 MWh
Location San Jose, California
Interconnection Metcalf Substation at 115 kV
Gen-Tie Underground — Largely City of
San Jose Public Easement
Ownership 100% esVolta LP
Customer Pacific Gas & Electric
Key Fact esVolta’s largest project to date
Hummingbird developed specifically to reduce PG&E’s reliance on natural gas generation
In 2017, Metcalf Generating Station, a 605 MW natural gas fired plant in Coyote Valley, filed to withdraw from the California Independent System Operator (CAISO) market, due to the poor economics of operating the plant.
CAISO said Metcalf could not safely retire as it is critical for local grid reliability, and required PG&E to sign a Reliability Must Run (RMR) contract with Metcalf at above market prices.
The decision to keep Metcalf running was protested by environmental groups, resulting in the California Public Utility Commission requiring PG&E to conduct an RFP to determine if energy storage could replace the retiring natural gas generation at a lower cost.
The energy storage projects offered in the RFP were competitive with the RMR contract and PG&E awarded agreements to several projects including Hummingbird.