Weiser BESS — Plant Summary
- EIA Plant ID
- 66330
- Capacity
- 3 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries
- Status
- Operating
- Location
- Washington, ID
- Operating Since
- 2025
- Generators
- 1
- Operator
- Idaho Power Co
- Parent Company
- IDACORP
- Balancing Authority
- Idaho Power Company
- ISO/RTO
- —
- NERC Region
- WECC
Weiser BESS
OperatingBESS
Ranked #8 of 10 BESS plants in ID#747 of 837 nationally
3 MW BESS operating in Washington, ID — Idaho Power Company
EIA
3 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2025
Operating Since
Location
Coordinates
44.2475, -116.9853
County
Washington, ID
Nearby Plants
- Hyline Solar Center, LLCSolar9 MW · 10.9 km
- Ontario Solar CenterSolar3 MW · 15.3 km
- Willow Spring Windfarm (Burnt River)Wind10 MW · 27.3 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Idaho Power Co | Idaho Power | — |
| Owner(s) | Idaho Power Co | IDACORP | — |
| Status | Operating | — | — |
Ownership Chain
About
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
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Idaho Power Company
Grid Voltage
12.47 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
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 (3)Beta
Regulatory·permitting
Idaho Power Company; Notice of Intent To File License Application, Filing of Pre-Application Document, and Approving Use of the Traditional Licensing Process
Federal Register (FERC)·3 days ago
General
Idaho Power seeks regulatory approval of 100MW additional BESS after offtake agreement with Savion falls through
Idaho Power is seeking approval from the state regulator to deploy an additional 100MW of BESS to plug the gap left within its portfolio.
Energy-Storage.News·1 years ago
General
Idaho Power begins work on state’s first utility-scale storage installation
Work began last week on Idaho's largest energy storage projects to date, with 80 MW of battery systems being constructed by Idaho Power at its Hemingway...
Daily Energy Insider·3 years ago
Last updated 2026-03-25
View all articles