300 MW BESS under construction in La Paz, AZ — California Independent System Operator
300 MW
Nameplate Capacity
2
Generators
units
Batteries
Technology
—
Operating Since
Coordinates
33.5829, -113.5769
County
La Paz, AZ
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Atlas VII LLC | — | — |
| Owner(s) | Atlas VII LLC | — | — |
| Status | Under construction | — | — |
Atlas VII is a 300 MW battery energy storage system located in La Paz County, Arizona. The plant, identified by the EIA plant code 68322, is owned and operated by Atlas VII LLC. It consists of 2 generators utilizing batteries as its primary fuel source, designated in energy data as MWH. The facility operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region.
Atlas VII holds a notable position among Arizona's power plants, ranking as the 26th largest out of 47 facilities in the state and 155th largest nationally out of 514 plants. The plant's activity has been noted in the news, with 3 articles covering deals related to the facility.
Generated from EIA, GEM, and public data sources
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
−488 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.
No financial data available for this plant.
Market Position
ISO/RTO Market
CAISO
LMP Node
—
Pricing Hub
TH_SP15_GEN-APND
Node Source
Plant coordinates only
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 battery energy storage (BESS) projects located in Arizona, US.
TransGrid Secures $1.4 Billion Financing for Battery Storage Projects in Arizona
TransGrid Energy LLC, a key player in utility-scale renewable energy under Hanwha FutureProof, has successfully secured over $1.4 billion in financing.
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.
Last updated 2026-03-26
View all articles