GridStor's self-integrated 220 MW battery near Galveston Bay
Hidden Lakes is GridStor's 220 MW / 440 MWh two-hour battery in Galveston County. Anza's exact-project case study records 204 battery units and 68 inverter skids in GridStor's self-integrated design; the project occupies about 15 acres, with enclosures on roughly five.
Answers use this researched asset profile with live ERCOT data. Ask about ownership, equipment, project history, or current grid context.
Live ERCOT public data · answers can be wrong, verify against source data or the ISO.
Two-hour EIA/owner built capacity.
Plus 68 inverter skids.
Separate from $86M tax-credit transfer.
Mapped infrastructure geometry associated with this asset.
Illustrative BESS equipment layout for comparing sites. Not an as-built site map.
Mapped infrastructure geometry associated with this asset.
Similar plants ranked by technology, capacity, and distance.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| HL001 | 220 MW 220 MW summer | Batteries Electricity used for energy storage · BA | Oct 2025 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
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.
Project milestones and public references behind the asset profile.
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.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Hidden Lakes Reliability Project has a reported capacity of 220 MW and an energy capacity of 440 MWh. Source: EIA Form 860M.
Hidden Lakes Reliability Project is a Self-integrated battery storage facility in Galveston County, TX, participating in the ERCOT market.
Hidden Lakes Reliability Project is in Galveston County, TX, inside the ERCOT balancing area.
Hidden Lakes Reliability Project is operated by Evelyn Energy Storage LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Hidden Lakes Reliability Project reported 17.3 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.
Hidden Lakes Reliability Project interconnects at Hidden Lakes.
By capacity, Hidden Lakes Reliability Project ranks #41 of 962 operating plants of the same technology nationally. It ranks #14 of 223 in TX.
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.