Union Garden
Rice County, Minnesota · EIA plant ID 63939 · Operator: excelsior energy capital
Nameplate1MWSummer 1 MW
Generators1in service
Net generation2GWh12 mo to Dec 2025
Capacity factor20%solar units, summer MW
Heat rate—thermal plants only
First online2021
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) |
|---|---|---|---|
| 2021 | 1.5 | 20.7% | — |
| 2022 | 1.8 | 21.1% | — |
| 2023 | 2 | 23.3% | — |
| 2024 | 1.8 | 20.2% | — |
| 2025 | 1.8 | 20.4% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| CGS | Solar Photovoltaic | PV | 1 | 1 | Mar 2021 | Operating | — | coming soon |
Owner / operator
Operator: excelsior energy capital. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| excelsior energy capital | 100.0% | 1 MW |
Nearby plants
Within 80 km.
| Northfield Holdco CSG | 5 MW | 1.5 km |
| Lyman Garden | 1 MW | 1.6 km |
| USS Hubers Solar LLC CSG | 1 MW | 1.6 km |
| Carleton College | 8 MW | 1.8 km |
| Mazaska Garden | — | 2 km |
| St. Olaf StandBy Generators | 4 MW | 3.7 km |