Pediment BESS I — Plant Summary
- EIA Plant ID
- 68477
- Capacity
- 250 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries
- Status
- Under construction
- Location
- Maricopa, AZ
- Operating Since
- —
- Generators
- 1
- Operator
- Pediment BESS I LLC
- Parent Company
- —
- Balancing Authority
- Salt River Project
- ISO/RTO
- —
- NERC Region
- WECC
Pediment BESS I
Under constructionBESS
Ranked #23 of 55 BESS plants in AZ#115 of 837 nationally
250 MW BESS under construction in Maricopa, AZ — Salt River Project
EIA
250 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
—
Operating Since
Location
Coordinates
33.3557, -111.6021
County
Maricopa, AZ
Nearby Plants
- Mesa Carport PVSolar4.6 MW · 0.9 km
- SantanNatural Gas1326 MW · 14.0 km
- Banner Solar IronwoodSolar1.4 MW · 16.2 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Pediment BESS I LLC | — | — |
| Owner(s) | Pediment BESS I LLC | — | — |
| Status | Under construction | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Pediment BESS I is a 250 MW battery energy storage system located in Maricopa County, Arizona. The plant, identified by the EIA plant code 68477, is owned and operated by Pediment BESS I LLC. It consists of a single generator utilizing batteries as its primary fuel source, measured in MWh. The facility operates within the Salt River Project balancing authority, which falls under the Western Electricity Coordinating Council (WECC) NERC region.
The plant is ranked as the 29th largest power plant in Arizona out of 47, and nationally it holds a rank of 197 out of 514 facilities. Public information indicates that the plant has been the subject of 7 news articles, with 5 focusing on deals and 2 covering industry-related topics.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Salt River Project
Grid Voltage
230 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
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (7)Beta
Industry·corporate
ENR Mountain States & Southwest Previews List of 2025 Top Starts
ENR Mountain States & Southwest will name some of the top 2025 construction starts in the region in our April 27 print issue,...
ENR·3 days ago
Deals·project finance
Aypa Power finances construction of a new 400 MWh battery in Texas
Aypa Power secures financing to construct a 200 MW / 400 MWh BESS near Houston.
Aypa Power (developer)
ESS News·1 years ago
Deals·debt financing
Aypa Power secures US$190 million financing for 200MW/400MWh Texas BESS
Developer-operator Aypa Power has closed a US$190 million financing for the 200MW/400MWh Bypass battery energy storage system (BESS)...
Aypa Power (developer)
Energy-Storage.News·1 years ago
Deals·m and a
CleanCapital adds $145M to 23 MW portfolio acquisition | Solar Financing Spotlight
CleanCapital acquires a project portfolio of 40 assets and adds a $145 million investment. Dimension Energy secures a funding package to...
CleanCapital (buyer)Dimension Energy (other)
Solar Builder·1 years ago
Last updated 2026-03-14
View all 7 articles