Puueo
Hawaii County, Hawaii · EIA plant ID 771 · Operator: Hawaii Electric Light Co Inc
Nameplate3MWSummer 3 MW
Generators2in service
Net generation2GWh12 mo to Aug 2026
Capacity factor7%hydro units, summer MW
Heat rate—thermal plants only
First online1918
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), hydro 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 | 12.9 | 61.2% | — |
| 2002 | 8.1 | 40.8% | — |
| 2003 | -0 | -0.8% | — |
| 2004 | 3.4 | 56.1% | — |
| 2005 | 5.5 | 48.5% | — |
| 2006 | 16.9 | 62.2% | — |
| 2007 | 8.3 | 30.6% | — |
| 2008 | 12.1 | 44.3% | — |
| 2009 | 20.4 | 75.2% | — |
| 2010 | 12.1 | 44.5% | — |
| 2011 | 15.9 | 58.4% | — |
| 2012 | 21 | 77.2% | — |
| 2013 | 13.8 | 50.9% | — |
| 2014 | 16.7 | 61.7% | — |
| 2015 | 15.8 | 58.1% | — |
| 2016 | 13.5 | 49.4% | — |
| 2017 | 5.5 | 20.4% | — |
| 2018 | 15.3 | 56.4% | — |
| 2019 | 11.5 | 42.2% | — |
| 2020 | 5.5 | 20.0% | — |
| 2021 | 9 | 33.3% | — |
| 2022 | 6.1 | 22.5% | — |
| 2023 | 5.5 | 20.3% | — |
| 2024 | 4.1 | 15.1% | — |
| 2025 | 1 | 3.8% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | HY | 0.7 | 0.7 | Dec 1918 | Operating | — | coming soon |
| 2A | Conventional Hydroelectric | HY | 2.4 | 2.4 | Oct 2005 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 1.5 | 1.7 | Sep 1941 | Retired Dec 2002 | — | coming soon |
Owner / operator
Operator: Hawaii Electric Light Co Inc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Hawaii Electric Light Co Inc | 100.0% | 3 MW |
Nearby plants
Within 80 km.
| Waiau Hydro | 1 MW | 3 km |
| Kanoelehua | 21 MW | 3.8 km |
| W H Hill | 37 MW | 4 km |
| Wailuku River Hydroelectric | 10 MW | 6.2 km |
| Mauna Loa Macadamia Nut | 1 MW | 11.6 km |
| Puna | 39 MW | 12.2 km |