Rock Hall
Kent County, Maryland · EIA plant ID 58241 · Operator: Terraform Arcadia
Nameplate1MWSummer 1 MW
Generators1in service
Net generation1GWh12 mo to Dec 2025
Capacity factor17%solar units, summer MW
Heat rate—thermal plants only
First online2012
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) |
|---|---|---|---|
| 2012 | 0.1 | 15.2% | — |
| 2013 | 1.9 | 21.1% | — |
| 2014 | 1.8 | 20.6% | — |
| 2015 | 1.8 | 21.1% | — |
| 2016 | 1.9 | 21.2% | — |
| 2017 | 1.8 | 20.9% | — |
| 2018 | 1.7 | 19.0% | — |
| 2019 | 1.7 | 19.5% | — |
| 2020 | 1.6 | 17.7% | — |
| 2021 | 1.9 | 21.9% | — |
| 2022 | 1.7 | 19.9% | — |
| 2023 | 1.7 | 19.2% | — |
| 2024 | 1.6 | 18.1% | — |
| 2025 | 1.5 | 17.1% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| RCKHL | Solar Photovoltaic | PV | 1 | 1 | Dec 2012 | Operating | — | coming soon |
Owner / operator
Operator: Terraform Arcadia. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Terraform Arcadia | 100.0% | 1 MW |
Nearby plants
Within 80 km.
| Town of Chestertown- Chestertown WWTP | 1 MW | 14.7 km |
| Morgnec Solar | 56 MW | 18.1 km |
| Kent County - Worton Complex | 1 MW | 19.4 km |
| Bd of Educ of Queen Anne's Cnty, Cnty HS | 2 MW | 19.5 km |
| Amazon Maryland DCA1 | 1 MW | 22.2 km |
| Queen Anne's County | 2 MW | 22.4 km |