Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Zeltmann | Port Jefferson |
|---|---|---|
| Capacity | 528 MW | 498 MW |
| Technology | Natural Gas Fired Combined Cycle | Natural Gas Fired Combustion Turbine, Petroleum Liquids, Natural Gas Steam Turbine |
| Operator | New York Power Authority | National Grid Generation LLC |
| Operating units | 3 | 5 |
| Latest 12-month generation | 2.83 TWh | 413.8 GWh |
| Latest complete-year capacity factor | 79.4% (2024) | 7.7% (2025) |
| National technology rank | #301 of 538 | #70 of 257 |
| Latest EIA report | 2026-06 | 2026-06 |