Waihonu South Solar
Honolulu County, Hawaii · EIA plant ID 58656 · Operator: ERCAM LLC
Nameplate2MWSummer 2 MW
Generators3in service
Net generation3GWh12 mo to Dec 2025
Capacity factor19%solar units, summer MW
Heat rate—thermal plants only
First online2016
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) |
|---|---|---|---|
| 2016 | 1.3 | 19.4% | — |
| 2017 | 3.4 | 25.5% | — |
| 2018 | 2.7 | 20.6% | — |
| 2019 | 2.8 | 21.2% | — |
| 2020 | 2.8 | 21.5% | — |
| 2021 | 2.9 | 21.9% | — |
| 2022 | 2.7 | 20.2% | — |
| 2023 | 1.8 | 13.6% | — |
| 2024 | 1.3 | 9.9% | — |
| 2025 | 2.5 | 19.2% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| INV-1 | Solar Photovoltaic | PV | 0.5 | 0.5 | Jul 2016 | Operating | — | coming soon |
| INV-2 | Solar Photovoltaic | PV | 0.5 | 0.5 | Jul 2016 | Operating | — | coming soon |
| INV-3 | Solar Photovoltaic | PV | 0.5 | 0.5 | Jul 2016 | Operating | — | coming soon |
Owner / operator
Operator: ERCAM LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| ERCAM LLC | 100.0% | 2 MW |
Nearby plants
Within 80 km.
| Waihonu North Solar | 5 MW | 0.4 km |
| Waipio Solar | 46 MW | 3.8 km |
| Schofield Generating Station | 50 MW | 4.4 km |
| Lanikuhana Solar LLC | 15 MW | 4.5 km |
| Ho'Ohana Solar 1 | 117 MW | 5.8 km |
| AES Waiawa Phase 2 Solar | — | 5.9 km |