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220 MW BESS operating in Galveston, TX — Electric Reliability Council of Texas, Inc.
220 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2025
Operating Since
Coordinates
29.4890, -95.0365
County
Galveston, TX
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Evelyn Energy Storage LLC | — | — |
| Owner(s) | Evelyn Energy Storage LLC | — | — |
| Status | Operating | — | — |
The Hidden Lakes Reliability Project, located in Galveston County, Texas, is a 220 MW battery energy storage system. The plant is owned and operated by Evelyn Energy Storage LLC. It interconnects to the Electric Reliability Council of Texas (ERCOT) balancing authority.
The facility, which utilizes batteries as its primary fuel source (MWH), consists of a single generator. Hidden Lakes Reliability Project ranks as the 88th largest power plant in Texas out of 224 facilities, and 247th nationally out of 514.
Generated from EIA, GEM, and public data sources
ISO/RTO
ERCOT
Market
ISO/RTO Member
NERC Region
TRE — Texas Reliability Entity
Balancing Authority
−1 MWh
Net Charging
—
Annual Net Energy
—
Capacity Factor
Positive values indicate net discharge (generation exceeds station load). Negative values indicate net charging. Pure battery storage plants are typically net negative due to round-trip efficiency losses.
2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $299.4M
Market Position
ISO/RTO Market
ERCOT
LMP Node
EVLN_ESS_RN
Pricing Hub
HB_HOUSTON
Alt. Hub / Zone
LZ_HOUSTON
Location Type
Resource Node
Node Source
EIA-860 direct report
Last updated 2026-03-14
View all 7 articlesElectric Reliability Council of Texas, Inc. (ERCO)
Grid Voltage
138.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP