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150 MW BESS operating in Ellis, TX — Electric Reliability Council of Texas, Inc.
150 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2025
Operating Since
Coordinates
32.4523, -97.0726
County
Ellis, TX
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Desert Willow Energy Storage | — | — |
| Owner(s) | Desert Willow Energy Storage | — | — |
| Status | Operating | — | — |
Desert Willow Energy Storage is a 150 MW battery energy storage system (BESS) located in Ellis County, Texas. The facility, owned and operated by Desert Willow Energy Storage, began operating in 2025. It is interconnected to the Electric Reliability Council of Texas, Inc. (ERCOT) balancing authority. The plant's primary fuel is listed as MWH, indicating it draws power from the grid to charge its batteries.
The facility consists of a single generator utilizing battery technology. With a duration of 2 hours, the BESS can discharge its full 150 MW capacity for that period. Desert Willow Energy Storage ranks as the 162nd largest power plant in Texas out of 224, and 391st 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
−2.0K MWh
Net Charging
-16.8K MWh
Annual Net Energy
-1.9%
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: $204.2M
Market Position
ISO/RTO Market
ERCOT
LMP Node
DSWL_BES1
Pricing Hub
HB_NORTH
Alt. Hub / Zone
LZ_NORTH
Location Type
Resource Node
Node Source
Curated node match
Last updated 2026-03-26
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ask pi about Desert Willow Energy StorageElectric Reliability Council of Texas, Inc. (ERCO)
Grid Voltage
345.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP