Waihonu South Solar
Solar power plant in Honolulu County, Hawaii. 1.5 MW of nameplate capacity across 3 generators, operated by ERCAM LLC.
Also known as EIA plant 58656
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 1.5 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- July 2016First generator online
- Operator
- ERCAM LLCEIA operator ID 67492
- Grid
- Not reported
- Price nodes
- None linkedNo verified ISO node
- Location
- Honolulu County, HI21.4689, −158.0164
- EIA plant ID
- 58656EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Waihonu South Solar produces
Free · EIA-923Net generation, 2025
2.52 GWh
2,518 MWh, final
Capacity factor, 2025
19.2%
2024: 9.7%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2017 to 2025
1.3–3.4
GWh a year. Low 2024, high 2017
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | Not reported | Not reported | 0 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | Not reported | Not reported | 0 of 12 |
| 2012 | Not reported | Not reported | 0 of 12 |
| 2013 | Not reported | Not reported | 0 of 12 |
| 2014 | Not reported | Not reported | 0 of 12 |
| 2015 | Not reported | Not reported | 0 of 12 |
| 2016 | 1,286 | Not reported | 6 of 12 |
| 2017 | 3,354 | 25.5% | 12 of 12 |
| 2018 | 2,705 | 20.6% | 12 of 12 |
| 2019 | 2,781 | 21.2% | 12 of 12 |
| 2020 | 2,836 | 21.5% | 12 of 12 |
| 2021 | 2,874 | 21.9% | 12 of 12 |
| 2022 | 2,653 | 20.2% | 12 of 12 |
| 2023 | 1,792 | 13.6% | 12 of 12 |
| 2024 | 1,282 | 9.7% | 12 of 12 |
| 2025 | 2,518 | 19.2% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| INV-1 | Solar Photovoltaic | 0.5 | July 2016 |
| INV-2 | Solar Photovoltaic | 0.5 | July 2016 |
| INV-3 | Solar Photovoltaic | 0.5 | July 2016 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists ERCAM LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Modeled curtailment
A range, not one number. The lower bound counts hours inside the production tax credit window; the upper bound is the no-credit case.
Expected vs reported generation
Monthly modeled expected output and physical potential next to EIA-923 reported output.
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Power plants near Waihonu South Solar
More plants operated by ERCAM LLC
Questions about Waihonu South Solar
How much power does Waihonu South Solar produce?
Waihonu South Solar reported 2,518 MWh (2.52 GWh) of net generation in 2025, a 19.2% capacity factor on 1.5 MW of nameplate capacity.
Where is Waihonu South Solar?
Waihonu South Solar is in Honolulu County, Hawaii, at 21.4689, −158.0164.
Who operates Waihonu South Solar?
EIA-860M for August 2026 lists ERCAM LLC as the operator (EIA operator ID 67492). The operator is not always the owner.
When did Waihonu South Solar start operating?
Its first generator began operating in July 2016, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page