Guajillo Energy Storage

OperatingBESS

Ranked #45 of 338 BESS plants in TX#134 of 963 nationally

228.7 MW BESS operating in Webb, TX — Electric Reliability Council of Texas, Inc.

EIA

228.7 MW

Nameplate Capacity

Generators

unit

Batteries

Technology

2025

Operating Since

Location

Coordinates

27.6289, -99.2664

County

Webb, TX

Nearby Plants

Corazon Energy LLC
Solar200 MW · 3.2 km
Wolf Tank Storage
BESS150 MW · 5.8 km
Cuchillas PV and BESS
BESS612.5 MW · 8.2 km

Status

Latest milestoneconstruction completed · 2025-01-14Rigzone · 2025-01-14

Expected CODQ2 2025Rigzone · 2025-01-14

Ownership & Operator

Field	EIA	GEM	Wikidata
Operator	Guajillo Energy Storage, LLC	—	—
Owner(s)	Guajillo Energy Storage, LLC	—	—
Status	Operating	—	—

Ownership Chain

No GEM tracker match for this plant — ownership chain unavailable.

DeveloperPlenitude±reNEWS.BIZ · 2025-04-03

About

Guajillo Energy Storage is a battery energy storage system located in Webb County, Texas. The plant has a total capacity of 228.7 MW and consists of a single generator. It is owned and operated by Guajillo Energy Storage, LLC. The primary fuel type is electricity (MWH), indicating that the facility stores and discharges electricity rather than generating it directly from a fossil fuel or renewable source.

The facility operates within the Electric Reliability Council of Texas (ERCOT) balancing authority, which falls under the Texas Reliability Entity (TRE) NERC region. Guajillo Energy Storage is ranked as the 79th largest power plant in Texas out of 224 plants and is ranked 233rd nationally out of 514 plants.

Generated from EIA, GEM, and public data sources

EIA Plant Profile

Engineering & Generators

Grid Context

ISO/RTO

ERCOT

Market

ISO/RTO Member

NERC Region

TRE — Texas Reliability Entity

Balancing Authority

Generation

−183 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.

Financial Data

EIA Avg CostEIA Construction Cost AveragesMEDIUM

2023

Construction CostOperating CostPricing & Revenue

$1,361/kW

Est. Construction Cost

Total estimated cost: $311.3M

Technology Average·Based on EIA averages — not plant-specific financial reports

Pricing & Market Data

HIGH confidence

Market Position

ISO/RTO Market