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170 MW BESS operating in Maricopa, AZ
170 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2025
Operating Since
Coordinates
33.7126, -112.0820
County
Maricopa, AZ
Nearby Plants
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Request a demo →| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Scatter Wash Energy Storage, LLC | — | — |
| Owner(s) | Scatter Wash Energy Storage, LLC | — | — |
| Status | Operating | — | — |
Scatter Wash 1 is a 170 MW battery energy storage system located in Maricopa County, Arizona. The plant, which began operating in 2025, is owned and operated by Scatter Wash Energy Storage, LLC. It consists of a single generator utilizing battery technology with a duration of 4 hours. The plant's primary fuel source is electricity (MWH).
Scatter Wash 1 operates within the Arizona Public Service Company balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. It is ranked as the 39th largest power plant in Arizona out of 47, and nationally it is ranked 353rd out of 514.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
Arizona Public Service Company (AZPS)
Grid Voltage
230.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
−2.8K MWh
Net Charging
-21.8K MWh
Annual Net Energy
-2.2%
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.
2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $231.4M
This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
Last updated 2026-03-26
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