Horn Rapids Solar, Storage and Training
Solar power plant · Benton County, Washington
Nameplate capacity
4.2 MW
Rank in Washington
#119
of 139 plants
In service since
2020
October 2020
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Energy Northwest
- County
- Benton County
- Generating units
- 2
- Share of state capacity
- 0.01%
- Rank among solar plants in Washington
- #7 of 7
- EIA plant code
- 64198
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| HRPV | Solar Photovoltaic | 3.2 MW | 3.2 MW | 2020 | Operating |
| HRBE | Batteries | 1.0 MW | 1.0 MW | 2020 | 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 Washington
| Swauk Wind LLC | Wind | 4.3 MW |
| Weeks Falls | Hydro | 4.3 MW |
| Grimes Way | Other | 4.0 MW |
| Black Creek | Hydro | 3.7 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 4.2 MW solar plant and a 4.2 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 Washington power plants · What Washington actually generates