Onyx - Allen Harim
Sussex County, Delaware · EIA plant ID 61206 · Operator: A2-A Pearl Investments LLC
Nameplate1MWSummer 1 MW
Generators1in service
Net generation2GWh12 mo to Dec 2025
Capacity factor16%solar units, summer MW
Heat rate—thermal plants only
First online2017
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) |
|---|---|---|---|
| 2017 | 1.2 | 15.1% | — |
| 2018 | 2 | 18.9% | — |
| 2019 | 2.1 | 19.8% | — |
| 2020 | 2 | 18.9% | — |
| 2021 | 1.7 | 16.3% | — |
| 2022 | 2 | 18.9% | — |
| 2023 | 1.8 | 17.1% | — |
| 2024 | 1.9 | 18.2% | — |
| 2025 | 1.7 | 16.3% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 10021 | Solar Photovoltaic | PV | 1.2 | 1.2 | Apr 2017 | Operating | — | coming soon |
Owner / operator
Operator: A2-A Pearl Investments LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Janus Solar Fund LP | 100.0% | 1 MW |
Nearby plants
Within 80 km.
| CE DE - Harbeson | 4 MW | 1.2 km |
| SU165 | 2 MW | 7.6 km |
| DEC Phase II at Georgetown | 3 MW | 11.2 km |
| Bruce A Henry Solar Farm | 4 MW | 11.4 km |
| University of Delaware Wind Turbine | 2 MW | 13 km |
| Indian River Generating Station | 19 MW | 15.4 km |