Atlas BESS IV LLC — Plant Summary
- EIA Plant ID
- 68321
- Capacity
- 150 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries
- Status
- Under construction
- Location
- La Paz, AZ
- Operating Since
- —
- Generators
- 1
- Operator
- ATLAS BESS IV, LLC
- Parent Company
- —
- Balancing Authority
- California Independent System Operator
- ISO/RTO
- CAISO
- NERC Region
- WECC
Atlas BESS IV LLC
Under constructionBESS
Ranked #36 of 55 BESS plants in AZ#246 of 837 nationally
150 MW BESS under construction in La Paz, AZ — California Independent System Operator
EIA
150 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
—
Operating Since
Location
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | ATLAS BESS IV, LLC | — | — |
| Owner(s) | ATLAS BESS IV, LLC | — | — |
| Status | Under construction | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
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
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
California Independent System Operator
Grid Voltage
500 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
No generation data available for this plant.
Financial Data
No financial data available for this plant.
Pricing & Market Data
UNKNOWN confidenceMarket Position
ISO/RTO Market
CAISO
LMP Node
—
Pricing Hub
TH_SP15_GEN-APND
Node Source
Plant coordinates only
News & Articles (3)Beta
Deals·project finance
TransGrid Energy secures US$1.4 billion for two Arizona BESS totalling 450MW/1,800MWh
TransGrid Energy has successfully secured over US$1.4 billion in financing for two BESS projects located in Arizona totalling 450MW/1800MWh.
TransGrid Energy (developer)
Energy-Storage.News·1 years ago
Deals·project finance
TransGrid Energy secures $1.4 billion in financing
The capital raised will fund the development of two new stand-alone battery storage projects in Arizona.
TransGrid Energy (developer)
Hanwha Group·1 years ago
Regulatory·state puc
California utility PG&E seeks regulatory approval of 575MW+ hybrid battery storage procurement
PG&E is seeking regulatory approval for a four-project portfolio of hybrid solar and storage resources with over 575MW of battery storage output.
PG&E (operator)
Energy-Storage.News·1 years ago
Last updated 2026-03-14
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