CES Marbletown Solar
Ulster County, New York · EIA plant ID 63729 · Operator: RWE Clean Energy
Nameplate3MWSummer 3 MW
Generators1in service
Net generation5GWh12 mo to Dec 2025
Capacity factor19%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 | 3.3 | 14.8% | — |
| 2022 | 5 | 18.9% | — |
| 2023 | 4.9 | 18.7% | — |
| 2024 | 5 | 19.1% | — |
| 2025 | 5 | 19.0% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| MT1 | Solar Photovoltaic | PV | 3 | 3 | Mar 2021 | Operating | — | coming soon |
Owner / operator
Operator: RWE Clean Energy. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| RWE Clean Energy | 100.0% | 3 MW |
Nearby plants
Within 80 km.
| New Beginnings Solar | 2 MW | 1.1 km |
| 700 Binnewater | 1 MW | 4.2 km |
| Sturgeon | 14 MW | 6.2 km |
| Landau Solar | 2 MW | 6.4 km |
| Landau II Solar (Hybrid) | 8 MW | 6.7 km |
| Central Hudson High Falls | 3 MW | 6.8 km |