AES ES GILBERT — Plant Summary
- EIA Plant ID
- 61861
- Capacity
- 10 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries
- Status
- Out of service
- Location
- Maricopa, AZ
- Operating Since
- 2019
- Generators
- 1
- Operator
- AES ES GILBERT, LLC
- Parent Company
- —
- Annual Generation
- 0 MWh
- Capacity Factor
- 0.0%
- Balancing Authority
- Salt River Project
- ISO/RTO
- —
- NERC Region
- WECC
AES ES GILBERT
Out of serviceBESS
Ranked #54 of 55 BESS plants in AZ#570 of 837 nationally
10 MW BESS out of service in Maricopa, AZ — Salt River Project
EIAWD
10 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2019
Operating Since
Location
Coordinates
33.4468, -111.9563
County
Maricopa, AZ
Nearby Plants
- CrosscutHydro3 MW · 1.3 km
- Phoenix Airport East Economy LotSolar1.1 MW · 2.9 km
- AZ State University - Tempe Campus SolarSolar2.5 MW · 3.6 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | AES ES GILBERT, LLC | — | — |
| Owner(s) | AES ES GILBERT, LLC | — | — |
| Status | Out of service | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
The AES ES GILBERT facility is a 10 MW battery energy storage system (BESS) located in Maricopa County, Arizona. The plant began operating in 2019 and is owned and operated by AES ES GILBERT, LLC. It consists of a single generator utilizing lithium-ion battery (LIB) chemistry. The BESS has a total storage capacity of 40 MWh, providing a duration of 4 hours at its full power rating.
The facility interconnects to the Salt River Project balancing authority within the Western Electricity Coordinating Council (WECC) NERC region. According to available data, the plant ranks 68th out of 68 power plants in Arizona and 770th out of 1205 nationally. Financial data indicates a power purchase agreement (PPA) price of $7 per MWh, as reported in FERC Electric Quarterly Reports (EQR). The plant's primary fuel is listed as MWH, indicating it draws power from the grid to charge its batteries.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Salt River Project
Grid Voltage
12.47 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
0 MWh
Net Discharge
0 MWh
Annual Net Energy
0.0%
Capacity Factor
Jan 2023 – Dec 2025
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.
Financial DataBeta
Source: FERC Electric Quarterly ReportsHIGH
$7.0/MWh
PPA Price
AES ES Gilbert, LLC
Contract Seller
Per-Unit Cost Trends
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (2)Beta
Grid·outage
AES investigating cause of "thermal runaway" at Arizona site
Power company AES Corporation is investigating the cause of what has been described as a thermal runaway incident at a 10MW battery energy storage system (BESS...
AES Corporation (operator)
Energy-Storage.News·3 years ago
Grid·outage
Cause of battery storage fire in Arizona under investigation
AES said it plans to investigate the cause of a smoldering fire at one of its lithium battery storage facilities in Chandler, Arizona.
AES (operator)
Power Engineering·3 years ago
Last updated 2026-03-15
View all articles