Merck Rahway Power Plant
Natural gas power plant · Union County, New Jersey
Nameplate capacity
21 MW
Rank in New Jersey
#35
of 425 plants
In service since
1977
January 1977
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Steam Turbine
- Operator
- Merck & Co Inc
- County
- Union County
- Generating units
- 4
- Share of state capacity
- 0.11%
- Rank among natural gas plants in New Jersey
- #27 of 51
- EIA plant code
- 10224
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GEN9 | Natural Gas Steam Turbine | 11 MW | 11 MW | 2004 | Operating |
| GEN8 | Natural Gas Steam Turbine | 5.0 MW | 5.0 MW | 1977 | Out of service and NOT expected to return to service in next calendar year |
| GEN9A | Natural Gas Steam Turbine | 4.5 MW | 5.1 MW | 2017 | Operating |
| SOLAR | Solar Photovoltaic | 0.5 MW | 0.4 MW | 2005 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in New Jersey
| Middlesex County Utilities Authority | Other | 23 MW |
| EDF Ph1 Toms River | Solar | 21 MW |
| Andover Energy Storage Project | Battery storage | 20 MW |
| Ben Moreell Solar Farm | Solar | 20 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 21 MW solar plant and a 21 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All New Jersey power plants · What New Jersey actually generates