Ridgetop
Kern County, California · EIA plant ID 54931 · Operator: Terra-Gen Operating Co LLC
Nameplate47MWSummer 47 MW
Generators1in service
Net generation118GWh12 mo to Dec 2025
Capacity factor29%wind units, summer MW
Heat rate—thermal plants only
First online1994
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), wind 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) |
|---|---|---|---|
| 2001 | 36.5 | 32.1% | — |
| 2002 | 39 | 34.2% | — |
| 2003 | 39.8 | 34.9% | — |
| 2004 | 144.5 | 35.1% | — |
| 2005 | 136.9 | 33.4% | — |
| 2006 | 142.2 | 34.6% | — |
| 2007 | 160.2 | 39.0% | — |
| 2008 | 156.2 | 37.9% | — |
| 2009 | 143.8 | 35.0% | — |
| 2010 | 144.3 | 35.1% | — |
| 2011 | 145.2 | 35.3% | — |
| 2012 | 122.9 | 29.8% | — |
| 2013 | 132.9 | 32.3% | — |
| 2014 | 144.8 | 35.2% | — |
| 2015 | 132.1 | 32.2% | — |
| 2016 | 152 | 36.9% | — |
| 2017 | 144.1 | 35.1% | — |
| 2018 | 137.8 | 33.5% | — |
| 2019 | 133.9 | 32.6% | — |
| 2020 | 139.8 | 33.9% | — |
| 2021 | 151.8 | 37.0% | — |
| 2022 | 135.5 | 33.0% | — |
| 2023 | 119.5 | 29.1% | — |
| 2024 | 145.9 | 35.4% | — |
| 2025 | 117.6 | 28.6% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| WGN1 | Onshore Wind Turbine | WT | 46.8 | 46.9 | Apr 1994 | Operating | — | vestas V47-660 |
Owner / operator
Operator: Terra-Gen Operating Co LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Ridgetop Energy LLC II | 100.0% | 47 MW |
Nearby plants
Within 80 km.
| Cameron Ridge LLC | 60 MW | 0.1 km |
| Ridgetop Energy LLC | 29 MW | 0.5 km |
| CTV Power Purchase Contract Trust | 5 MW | 1.9 km |
| Coram Tehachapi | 7 MW | 2.4 km |
| Coram Energy LLC | 3 MW | 2.4 km |
| Oasis Wind | 60 MW | 2.5 km |