Gateway Energy Storage, LLC - San Diego County - CAISO
Gateway is a 250 MW lithium-ion battery facility in East Otay Mesa. Its construction contractor describes 600 MWh of AC energy storage; the cited sources do not establish how much capacity is currently available following the May 2024 fire.
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Canonical EIA plant baseline.
plant-63834
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Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| GTWAY | 250 MW 250 MW summer | Batteries Electricity used for energy storage · BA | Jul 2020 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
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Project milestones and public references behind the asset profile.
The project launched and connected to the CAISO grid with an initial 62.5 MW of storage.
EIA-923 reports gross generation and net grid exchange for storage plants. Gross generation is shown as a discharge proxy; it is not a cycle count or conventional capacity factor.
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
EIA-860 lists generator GTWAY with this operating date.
LS Power publicly unveiled the 250 MW Gateway Energy Storage project as the world's largest battery project by capacity at that time. The project was operating at 230 MW and on track to reach 250 MW by the end of August 2020.
Gateway Energy Storage, LLC was transferred to REV Renewables, LLC as part of a broader LS Power common-control contribution transaction. REV received the battery-storage interests in exchange for REV membership units.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Gateway Energy Storage System has a reported capacity of 250 MW. Source: EIA Form 860M.
Gateway Energy Storage System is a batteries facility in San Diego County, CA, participating in the CAISO market.
Gateway Energy Storage System is in San Diego County, CA, inside the CAISO balancing area.
Gateway Energy Storage System is operated by Gateway Energy Storage, LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Gateway Energy Storage System reported 100.6 GWh over the twelve months to 2026-04. For a storage plant this is reported gross generation — a discharge proxy, not a cycle count or a conventional capacity factor.
By capacity, Gateway Energy Storage System ranks #27 of 962 operating plants of the same technology nationally. It ranks #7 of 248 in CA.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.