Topaz Solar Farm
San Luis Obispo County, California · EIA plant ID 57695 · Operator: Topaz Solar Farms LLC
Nameplate586MWSummer 586 MW
Generators5in service
Net generation982GWh12 mo to Aug 2026
Capacity factor19%solar units, summer MW
Heat rate—thermal plants only
First online2013
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), solar 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) |
|---|---|---|---|
| 2013 | 401.3 | 24.6% | — |
| 2014 | 1,105.9 | 29.6% | — |
| 2015 | 1,301.3 | 25.4% | — |
| 2016 | 1,265.8 | 24.6% | — |
| 2017 | 1,237.5 | 24.1% | — |
| 2018 | 1,335.7 | 26.0% | — |
| 2019 | 1,255.7 | 24.5% | — |
| 2020 | 1,282.7 | 24.9% | — |
| 2021 | 1,300.8 | 25.3% | — |
| 2022 | 1,221.4 | 23.8% | — |
| 2023 | 1,036.8 | 20.2% | — |
| 2024 | 1,071.1 | 20.8% | — |
| 2025 | 1,018.6 | 19.9% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| TPZ1 | Solar Photovoltaic | PV | 129.8 | 129.8 | Apr 2013 | Operating | — | coming soon |
| TPZ2 | Solar Photovoltaic | PV | 151.2 | 151.2 | Jun 2013 | Operating | — | coming soon |
| TPZ3 | Solar Photovoltaic | PV | 102.1 | 102.1 | Jan 2014 | Operating | — | coming soon |
| TPZ4 | Solar Photovoltaic | PV | 90.3 | 90.3 | Nov 2014 | Operating | — | coming soon |
| TPZ5 | Solar Photovoltaic | PV | 112.5 | 112.5 | Oct 2014 | Operating | — | coming soon |
Owner / operator
Operator: Topaz Solar Farms LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Topaz Solar Farms LLC | 100.0% | 586 MW |
Nearby plants
Within 80 km.
| California Valley Solar Ranch | 250 MW | 16.5 km |
| Wonderful Orchards - West Valley | 3 MW | 29.4 km |
| Berrenda Mesa Water District | 6 MW | 29.5 km |
| Blackwell Solar Park | 20 MW | 29.6 km |
| Wonderful Orchards - Belridge | 5 MW | 30.8 km |
| Lost Hills/Blackwell | 32 MW | 31 km |