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150 MW BESS under construction in La Paz, AZ
150 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
—
Operating Since
Coordinates
33.5829, -113.5769
County
La Paz, AZ
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | ATLAS BESS IV, LLC | — | — |
| Owner(s) | ATLAS BESS IV, LLC | — | — |
| Status | Under construction | — | — |
Atlas BESS IV LLC is a 150 MW battery energy storage system located in La Paz County, Arizona. The plant, identified by the EIA plant code 68321, is owned and operated by ATLAS BESS IV, LLC. It consists of a single generator and utilizes megawatt-hours (MWH) as its primary fuel source, indicative of its role in storing and discharging electricity. The facility operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region.
The Atlas BESS IV LLC facility is ranked as the 43rd largest power plant in Arizona out of 47 plants and 381st nationally out of 514 plants. Recent news coverage indicates activity related to deals and regulatory matters concerning the plant.
Generated from EIA, GEM, and public data sources
ISO/RTO
CAISO
Market
ISO/RTO Member
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
California Independent System Operator (CISO)
Grid Voltage
500.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
No generation data available for this plant.
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2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $204.2M
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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Market Position
ISO/RTO Market
CAISO
LMP Node
—
Pricing Hub
TH_SP15_GEN-APND
Node Source
Plant coordinates only
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 2026-03-26
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