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3 MW BESS operating in Washington, ID
3 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2025
Operating Since
Coordinates
44.2475, -116.9853
County
Washington, ID
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Idaho Power Co | Idaho Power | — |
| Owner(s) | Idaho Power Co | IDACORP | — |
| Status | Operating | — | — |
Weiser BESS is a battery energy storage system located in Washington County, Idaho. The plant has a total capacity of 3 MW and consists of a single generator utilizing battery technology. It began operating in 2025. The primary fuel type is electricity (MWH), indicating that the facility stores and discharges power rather than generating it directly from a fuel source.
The facility is owned by IDACORP and operated by Idaho Power Co. It operates within the Idaho Power Company balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. With a capacity of 3 MW, Weiser BESS is ranked as the 8th largest battery storage facility in Idaho (out of 10) and 1078th nationally (out of 1205). The battery system has a duration of 4 hours. News reports indicate regulatory interest in the plant.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
Idaho Power Company (IPCO)
Grid Voltage
12.47 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
No generation data available for this plant.
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2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $4.1M
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This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
175 buyers • 333 active contracts
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