Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Oswego Harbor Power | Holtsville |
|---|---|---|
| Capacity | 1,803.6 MW | 567 MW |
| Technology | Petroleum Liquids | Petroleum Liquids |
| Operator | Oswego Harbor Power | National Grid Generation LLC |
| Operating units | 2 | 10 |
| Latest 12-month generation | 120.7 GWh | 21.3 GWh |
| Latest complete-year capacity factor | 0.5% (2025) | 0.4% (2024) |
| National technology rank | #1 of 705 | #7 of 705 |
| Latest EIA report | 2026-06 | 2024-12 |