Tumbleweed Solar, LLC
Deschutes County, Oregon · EIA plant ID 61580 · Operator: Heelstone Energy Holdings, LLC
Nameplate10MWSummer 10 MW
Generators1in service
Net generation18GWh12 mo to Dec 2025
Capacity factor21%solar units, summer MW
Heat rate—thermal plants only
First online2017
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) |
|---|---|---|---|
| 2017 | 0.1 | 2.0% | — |
| 2018 | 20.6 | 23.7% | — |
| 2019 | 19.3 | 22.2% | — |
| 2020 | 21.1 | 24.2% | — |
| 2021 | 19.1 | 22.0% | — |
| 2022 | 20.2 | 23.3% | — |
| 2023 | 18.8 | 21.6% | — |
| 2024 | 18.7 | 21.6% | — |
| 2025 | 18.5 | 21.3% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| TUMBL | Solar Photovoltaic | PV | 9.9 | 9.9 | Dec 2017 | Operating | — | coming soon |
Owner / operator
Operator: Heelstone Energy Holdings, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Heelstone Energy Holdings, LLC | 100.0% | 10 MW |
Nearby plants
Within 80 km.
| Juniper Ridge Hydroelectric Project | 5 MW | 6.3 km |
| NorWest Energy 2, LLC | 10 MW | 13.9 km |
| OSLH, LLC | 10 MW | 14.6 km |
| Bear Creek Solar Center | 10 MW | 14.7 km |
| Bend | 1 MW | 15.8 km |
| Siphon Power Project | 5 MW | 19.3 km |