UK investor Gore Street energizes 400 MWh Californian battery

The battery backer said its 200 MW/400 MWh Big Rock project will start generating grid resource adequacy (RA) income in June 2025, its Dogfish site in Texas will be operational in February 2025, but there has been a delay to its Enderby project, in England.
ERCOT expects a 50% rise in peak electricity load demand across its grid by 2030. | Image: jplenio/Pixabay

London-listed Gore Street Energy Storage fund says it has energized its largest asset, the 200 MW/400 MWh Big Rock battery energy storage system (BESS), in California.

The investor said the project is backed by a grid RA contract worth $165 million over the project lifetime and that the RA revenue will begin in June 2025.

Gore Street said it expects the battery to begin generating revenue from merchant operations before June 2025 and added it expects the project to benefit from a 30% investment tax credit against its capital costs, under the terms of the US Inflation Reduction Act.

The English investor also updated progress on two of its other battery sites.

Gore Street said major cabling work has been completed at its 75 MW/75 MWh Dogfish BESS, in Texas, ensuring the site is on track to be energized in February 2025.

Japanese electric industry contractor Nidec, which is carrying out engineering, procurement, and construction services at the site for Gore Street, has said the Dogfish project will support the Electric Reliability Council of Texas (ERCOT) grid.

The London-based energy storage fund announced a delay in energizing its 57 MW/57 MWh Enderby BESS, near the English city of Leicester, citing “last-minute transformer inspection requirements” by electricity network company National Grid Electricity Transmission.

In a statement issued on its website on Jan. 21, 2025, Gore Street said it was “pushing to have [the Enderby project] energized promptly, with the next scheduled window for energization expected in the coming weeks.”

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