Hardin Solar III
Solar power plant in Hardin County, Ohio. 250 MW of nameplate capacity across 1 generator, operated by Hardin Solar Energy III.
Also known as EIA plant 68591
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 250 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- March 2025First generator online
- Operator
- Hardin Solar Energy IIIEIA operator ID 66960
- Grid
- PJMBalancing authority PJM
- Price nodes
- 1 PJM nodeResource nodes with prices
- Location
- Hardin County, OH40.6823, −83.7939
- EIA plant ID
- 68591EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Hardin Solar III produces
Free · EIA-923Net generation, 2025
471 GWh
470,630 MWh, final. 10 of 12 months reported
Capacity factor, 2025
Not reported
2024: Not reported
January to July 2026
338 GWh
Provisional
| 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 | Not reported | Not reported | 0 of 12 |
| 2017 | Not reported | Not reported | 0 of 12 |
| 2018 | Not reported | Not reported | 0 of 12 |
| 2019 | Not reported | Not reported | 0 of 12 |
| 2020 | Not reported | Not reported | 0 of 12 |
| 2021 | Not reported | Not reported | 0 of 12 |
| 2022 | Not reported | Not reported | 0 of 12 |
| 2023 | Not reported | Not reported | 0 of 12 |
| 2024 | Not reported | Not reported | 0 of 12 |
| 2025 | 470,630 | Not reported | 10 of 12 |
| 2026 (provisional, partial year) | 337,692 | 26.5% | 7 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 account · PJMEmissions
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 |
|---|---|---|---|
| HARD3 | Solar Photovoltaic | 250.0 | March 2025 |
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 Hardin Solar Energy III 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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Questions about Hardin Solar III
How much power does Hardin Solar III produce?
Hardin Solar III reported 470,630 MWh (471 GWh) of net generation in 2025. From January to July 2026 it reported 338 GWh, which is provisional. 10 of 12 months were reported for 2025.
Where is Hardin Solar III?
Hardin Solar III is in Hardin County, Ohio, at 40.6823, −83.7939. It is in the PJM Interconnection, LLC balancing area (PJM).
Who operates Hardin Solar III?
EIA-860M for August 2026 lists Hardin Solar Energy III as the operator (EIA operator ID 66960). The operator is not always the owner.
When did Hardin Solar III start operating?
Its first generator began operating in March 2025, according to EIA-860M.
Does InfraMap have power prices for Hardin Solar III?
Yes. InfraMap has PJM day-ahead and real-time prices at 1 price node linked to Hardin Solar III, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
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)
- PJM day-ahead and real-time prices; node and hub assignments as of 2026-10-05
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page