Geysers Unit 5-20
Sonoma County, California · EIA plant ID 286 · Operator: Geysers Power Co LLC
Nameplate1,236MWSummer 644 MW
Generators12in service
Net generation4,189GWh12 mo to Aug 2026
Capacity factor74%geothermal units, summer MW
Heat rate—thermal plants only
First online1971
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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), geothermal 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 | 4,832.6 | 73.1% | — |
| 2002 | 4,724 | 69.1% | — |
| 2003 | 4,751.2 | 70.4% | — |
| 2004 | 4,775.2 | 70.6% | — |
| 2005 | 4,745 | 70.3% | — |
| 2006 | 4,694.2 | 69.6% | — |
| 2007 | 4,809 | 71.3% | — |
| 2008 | 4,661.7 | 68.9% | — |
| 2009 | 4,681.5 | 69.4% | — |
| 2010 | 4,655.8 | 69.0% | — |
| 2011 | 4,698.4 | 69.7% | — |
| 2012 | 4,814.5 | 71.2% | — |
| 2013 | 4,784.9 | 70.9% | — |
| 2014 | 4,591.7 | 73.9% | — |
| 2015 | 4,531.2 | 73.5% | — |
| 2016 | 4,629 | 74.9% | — |
| 2017 | 4,667.7 | 81.5% | — |
| 2018 | 4,674.3 | 92.3% | — |
| 2019 | 4,351.4 | 77.1% | — |
| 2020 | 4,609.9 | 81.5% | — |
| 2021 | 4,580.4 | 81.2% | — |
| 2022 | 4,668.2 | 82.8% | — |
| 2023 | 4,499.6 | 79.8% | — |
| 2024 | 4,367.2 | 77.2% | — |
| 2025 | 4,314.8 | 76.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| U11 | Geothermal | ST | 118.8 | 68 | Dec 1975 | Operating | — | coming soon |
| U12 | Geothermal | ST | 118.8 | 51 | Aug 1979 | Operating | — | coming soon |
| U13 | Geothermal | ST | 139.8 | 65 | Apr 1980 | Operating | — | coming soon |
| U14 | Geothermal | ST | 124.2 | 60 | Feb 1980 | Operating | — | coming soon |
| U16 | Geothermal | ST | 124.2 | 60 | Oct 1985 | Operating | — | coming soon |
| U17 | Geothermal | ST | 124.2 | 60 | Nov 1982 | Operating | — | coming soon |
| U18 | Geothermal | ST | 124.2 | 60 | Nov 1983 | Operating | — | coming soon |
| U20 | Geothermal | ST | 124.2 | 50 | Oct 1985 | Operating | — | coming soon |
| U5 | Geothermal | ST | 59.4 | 45 | Apr 1971 | Operating | — | coming soon |
| U6 | Geothermal | ST | 59.4 | 45 | Apr 1971 | Operating | — | coming soon |
| U7 | Geothermal | ST | 59.4 | 40 | Jul 1972 | Operating | — | coming soon |
| U8 | Geothermal | ST | 59.4 | 40 | Jul 1972 | Operating | — | coming soon |
| U10 | Geothermal | ST | 55 | — | Jul 1973 | Retired May 2006 | — | coming soon |
| U9 | Geothermal | ST | 55 | — | Jul 1973 | Retired May 2006 | — | coming soon |
Owner / operator
Operator: Geysers Power Co LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Geysers Power Co LLC | 100.0% | 1,236 MW |
Nearby plants
Within 80 km.
| Calistoga Power Plant | 176 MW | 1.2 km |
| Sonoma California Geothermal | 78 MW | 1.8 km |
| West Ford Flat | 25 MW | 2.4 km |
| Geothermal 1 | 110 MW | 3.6 km |
| Geothermal 2 | 110 MW | 4.2 km |
| Bear Canyon | 13 MW | 4.8 km |