Waterboro
York County, Maine · EIA plant ID 68394 · Operator: Madison Energy Investments LLC
Nameplate5MWSummer 5 MW
Generators1in service
Net generation7GWh12 mo to Dec 2025
Capacity factor16%solar units, summer MW
Heat rate—thermal plants only
First online2023
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) |
|---|---|---|---|
| 2024 | 3.3 | 7.6% | — |
| 2025 | 7.1 | 16.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| WBMPV | Solar Photovoltaic | PV | 4.9 | 4.9 | Jul 2023 | Operating | — | coming soon |
Owner / operator
Operator: Madison Energy Investments LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Madison Energy Investments LLC | 100.0% | 5 MW |
Nearby plants
Within 80 km.
| 549 Doles Ridge Rd Solar LLC | — | 9.3 km |
| West Buxton | 8 MW | 12.6 km |
| Skelton | 17 MW | 13.1 km |
| Bar Mills | retired | 13.6 km |
| Bonny Eagle | 15 MW | 13.8 km |
| Emery Meadow Solar Station | — | 14.2 km |