Marlborough Solar
Ulster County, New York · EIA plant ID 66074 · Operator: Marlborough Solar, LLC
Nameplate2MWSummer 2 MW
Generators1in service
Net generation3GWh12 mo to Dec 2025
Capacity factor18%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) |
|---|---|---|---|
| 2022 | 3.1 | 17.8% | — |
| 2023 | 3.2 | 18.3% | — |
| 2024 | 3.4 | 19.5% | — |
| 2025 | 3.2 | 18.3% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 4942 | Solar Photovoltaic | PV | 2 | 2 | Mar 2021 | Operating | — | coming soon |
Owner / operator
Operator: Marlborough Solar, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Marlborough Solar, LLC | 100.0% | 2 MW |
Nearby plants
Within 80 km.
| Dutchess Cnty Resource Recovery Facility | 9 MW | 2.9 km |
| Vassar Brothers Medical Center | 10 MW | 4.4 km |
| Danskammer Generating Station | 537 MW | 7.1 km |
| Wappinger Falls Hydroelectric | 2 MW | 8.3 km |
| County of Dutchess, NY (Airport) | 2 MW | 8.6 km |
| Underhill | 2 MW | 9.2 km |