A four-hour storage plant built as 33 Fluence battery cores
Alamitos is AES's 100 MW / 400 MWh four-hour battery in Long Beach. ENR's exact-project construction record describes 33 Fluence Advancion 5 battery cores, 99 nodes, 1,386 racks, and 33 inverters inside a dedicated battery building.
Answers use this researched asset profile with live CAISO data. Ask about ownership, equipment, project history, or current grid context.
Live CAISO public data · answers can be wrong, verify against source data or the ISO.
Four-hour EIA/owner basis.
99 nodes and 1,386 racks.
ENR exact-project construction record.
Illustrative BESS equipment layout for comparing sites. Not an as-built site map.
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Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| ALMTS | 100 MW 100 MW summer | Batteries Electricity used for energy storage · BA | Jan 2021 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
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.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
Project milestones and public references behind the asset profile.
EIA-860 lists generator ALMTS with this operating date.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
AES ES Alamitos, LLC has a reported capacity of 100 MW and an energy capacity of 400 MWh. Source: EIA Form 860M.
AES ES Alamitos, LLC is a Lithium-ion battery storage in an enclosed building facility in Los Angeles County, CA, participating in the CAISO market.
AES ES Alamitos, LLC is in Los Angeles County, CA, inside the CAISO balancing area.
AES ES Alamitos, LLC is operated by AES ES Alamitos, LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
AES ES Alamitos, LLC reported 92.6 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.
AES ES Alamitos, LLC on the Southern California Edison system.
By capacity, AES ES Alamitos, LLC ranks #152 of 962 operating plants of the same technology nationally. It ranks #52 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.