Sierra Estrella Battery Energy Storage Clean Energy
| Client | Burns & McDonnell (Indirect: Salt River Project (SRP) & Plus Power) |
| Completion Date | 2024 |
| Location | Tolleson, AZ |
The 250-megawatt Sierra Estrella Energy Storage system, sitting on 11 acres in the West Valley, is now Arizona’s largest standalone battery system. It can store enough energy to power over 56,000 homes for four hours as approximated by Salt River Project (SRP). The system includes 276 battery units, supplying 69 MV transformers in groupings of four batteries per transformer. Located in the City of Avondale, the system is intended to function as an extension of the existing SRP utility grid through the interconnection into SRP’s Rudd Substation.
Sturgeon Electric was responsible for a substantial portion of material procurement for this project. Sturgeon Electric performed all below and above grade construction in the battery energy storage system (BESS) to include conduit, grounding, batteries, transformers, all associated wiring and interconnections for a 250 MW / 1,000 MWh BESS. Also, Sturgeon Electric performed all below and above grade construction of the 230/34.5kV substation. The system will help support grid reliability and resiliency.
Image courtesy of Plus Power