St Louis Solar
Marion County, Oregon · EIA plant ID 63456 · Operator: Neighborhood Power Corp.
Nameplate2MWSummer 2 MW
Generators1in service
Net generation4GWh12 mo to Dec 2025
Capacity factor20%solar units, summer MW
Heat rate—thermal plants only
First online2020
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), solar units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2020 | 3.3 | 20.4% | — |
| 2021 | 4.2 | 21.7% | — |
| 2022 | 4 | 20.5% | — |
| 2023 | 4.1 | 21.3% | — |
| 2024 | 4 | 20.5% | — |
| 2025 | 3.9 | 20.2% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| W9319 | Solar Photovoltaic | PV | 2.2 | 2.2 | Mar 2020 | Operating | — | coming soon |
Owner / operator
Operator: Neighborhood Power Corp.. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| St Louis Solar, LLC | 100.0% | 2 MW |
Nearby plants
Within 80 km.
| Interstate Solar | 2 MW | 3.1 km |
| SSD Marion 1, LLC | 2 MW | 3.3 km |
| Kale Patch Solar | 2 MW | 4.8 km |
| Carnes Creek Solar (CSG) | 3 MW | 5 km |
| Case Creek Solar | 2 MW | 6.1 km |
| Covanta Marion Inc | retired | 8.2 km |