Longwood Gardens
Chester County, Pennsylvania · EIA plant ID 57768 · Operator: Ecogy Pennsylvania Systems LLC
Nameplate1MWSummer 1 MW
Generators1in service
Net generation2GWh12 mo to Dec 2025
Capacity factor15%solar units, summer MW
Heat rate—thermal plants only
First online2010
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) |
|---|---|---|---|
| 2011 | 0.9 | 7.8% | — |
| 2012 | 2.2 | 18.9% | — |
| 2013 | 2.1 | 18.3% | — |
| 2014 | 2.1 | 18.0% | — |
| 2015 | 2.2 | 18.9% | — |
| 2016 | 2 | 17.9% | — |
| 2017 | 2.1 | 18.1% | — |
| 2018 | 1.8 | 16.2% | — |
| 2019 | 2 | 17.6% | — |
| 2020 | 2 | 17.6% | — |
| 2021 | 1.9 | 16.5% | — |
| 2022 | 1.9 | 17.0% | — |
| 2023 | 2 | 17.5% | — |
| 2024 | 1.8 | 15.4% | — |
| 2025 | 1.7 | 15.3% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Solar Photovoltaic | PV | 1.3 | 1.3 | May 2010 | Operating | — | coming soon |
Owner / operator
Operator: Ecogy Pennsylvania Systems LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Ecogy Pennsylvania Systems LLC | 100.0% | 1 MW |
Nearby plants
Within 80 km.
| Aqua Ingrams Mill | 1 MW | 10.9 km |
| AGT001 Centerville Fuel Cell | 1 MW | 12.7 km |
| Marlboro Mushrooms Solar Field | 1 MW | 13.9 km |
| South Campus Solar | 2 MW | 13.9 km |
| Westtown School Solar | 2 MW | 14 km |
| SECCRA Community Landfill | 3 MW | 14.9 km |