Herbert Farm Solar
Charles County, Maryland · EIA plant ID 58463 · Operator: SMECO Solar LLC
Nameplate6MWSummer 6 MW
Generators1in service
Net generation7GWh12 mo to Dec 2025
Capacity factor14%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) |
|---|---|---|---|
| 2013 | 8.8 | 18.3% | — |
| 2014 | 8.5 | 17.7% | — |
| 2015 | 8.5 | 17.6% | — |
| 2016 | 8.9 | 18.4% | — |
| 2017 | 8.6 | 17.9% | — |
| 2018 | 8.1 | 16.8% | — |
| 2019 | 8.5 | 17.7% | — |
| 2020 | 7.6 | 15.8% | — |
| 2021 | 7.6 | 15.8% | — |
| 2022 | 8.3 | 17.3% | — |
| 2023 | 7.6 | 15.8% | — |
| 2024 | 7.3 | 15.2% | — |
| 2025 | 6.5 | 13.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Solar Photovoltaic | PV | 5.5 | 5.5 | Nov 2012 | Operating | — | coming soon |
Owner / operator
Operator: SMECO Solar LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| SMECO Solar LLC | 100.0% | 6 MW |
Nearby plants
Within 80 km.
| Rockfish Solar LLC | 10 MW | 8.3 km |
| CPV St Charles Energy Center | 775 MW | 8.4 km |
| NRG Chalk Point CT | 94 MW | 9.9 km |
| Chalk Point LLC | 1,825 MW | 9.9 km |
| Brandywine Power Facility | 289 MW | 14.9 km |
| Keys Energy Center | 831 MW | 16.9 km |