Seaside BESS — Plant Summary
- EIA Plant ID
- 67711
- Capacity
- 200 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries
- Status
- Operating
- Location
- Multnomah, OR
- Operating Since
- 2025
- Generators
- 1
- Operator
- Portland General Electric Co
- Parent Company
- Portland General Electric
- Annual Generation
- -10,578 MWh
- Capacity Factor
- -1.2%
- Balancing Authority
- Portland General Electric Company
- ISO/RTO
- —
- NERC Region
- WECC
Seaside BESS
OperatingBESS
Ranked #5 of 9 BESS plants in OR#177 of 837 nationally
200 MW BESS operating in Multnomah, OR — Portland General Electric Company
EIA
200 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2025
Operating Since
Location
Coordinates
45.6153, -122.7811
County
Multnomah, OR
Nearby Plants
- River Road Gen PlantNatural Gas248 MW · 5.8 km
- Constable BESSBESS75 MW · 14.1 km
- Luz SolarSolar1.1 MW · 23.4 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Portland General Electric Co | Portland General Electric | — |
| Owner(s) | Portland General Electric Co | Portland General Electric | — |
| Status | Operating | — | — |
Ownership Chain
About
Seaside BESS is a 200 MW battery energy storage system located in Multnomah County, Oregon. The plant, which began operating in 2025, is owned and operated by Portland General Electric (PGE). It is the 8th largest power plant in Oregon and ranks 281st nationally. The facility consists of a single generator utilizing battery technology with a storage duration of 4 hours. The primary fuel type is listed as MWH, indicating it draws power from the grid to charge the batteries.
Seaside BESS operates within the Western Electricity Coordinating Council (WECC) NERC region and is under the balancing authority of Portland General Electric Company. The plant's integration into the grid has been noted in news articles covering grid-related topics.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Portland General Electric Company
Grid Voltage
230 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
−3.3K MWh
Net Charging
-10.6K MWh
Annual Net Energy
-1.2%
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.
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 (1)Beta
Grid·capacity addition
PGE completes BESS projects with 475MW capacity
Portland General Electric (PGE), the energy generation, transmission and distributor, said it has completed three utility-scale battery...
Portland General Electric (operator)
www.bestmag.co.uk·7 months ago
Last updated 2026-03-14
View all articles