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100 MW BESS operating in Hidalgo, TX
100 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2023
Operating Since
Coordinates
26.1698, -98.3298
County
Hidalgo, TX
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Madero Grid, LLC | — | — |
| Owner(s) | Madero Grid, LLC | — | — |
| Status | Operating | — | — |
Madero Grid is a 100 MW battery energy storage system (BESS) located in Hidalgo County, Texas. The plant, which began operating in 2023, is owned and operated by Madero Grid, LLC. It consists of a single generator utilizing lithium-ion battery (LIB) technology. The facility has a total storage capacity of 100 MWh, providing a duration of 1 hour at full output.
Madero Grid operates within the Electric Reliability Council of Texas (ERCOT) balancing authority and the Texas Reliability Entity (TRE) NERC region. As of the latest rankings, it is the 210th largest power plant in Texas out of 224, and the 496th largest nationally out of 514. The plant's primary fuel source is electricity (MWH), indicating it charges from the grid.
Generated from EIA, GEM, and public data sources
ISO/RTO
ERCOT
Market
ISO/RTO Member
NERC Region
TRE — Texas Reliability Entity
Balancing Authority
Electric 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
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
−1.2K MWh
Net Charging
-14.9K MWh
Annual Net Energy
-1.7%
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.
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2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $136.1M
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Point of Interconnection
Nearest Substation
Railroad DC Tie · 138 kV
Substation Distance
< 10 km
Operator
Sharyland Utilities
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ERCOT
LMP Node
MADERO_RN
Pricing Hub
HB_SOUTH
Alt. Hub / Zone
LZ_SOUTH
Location Type
Resource Node
Node Source
EIA-860 direct report
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-03-14
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