Industrial and Utility-Scale Solar Projects in Ohio
Ohio's industrial and utility-scale solar sector has expanded substantially as land-lease agreements, transmission access, and state siting authority have matured into a defined regulatory framework. Projects in this category range from large commercial installations exceeding 1 megawatt (MW) to utility-scale arrays delivering hundreds of megawatts to the regional grid. Understanding how these projects are classified, permitted, and interconnected is essential for landowners, developers, and local governments navigating Ohio's energy landscape. This page covers the regulatory structure, project typology, siting process, and decision thresholds that govern large-scale solar development in Ohio.
Definition and scope
Industrial and utility-scale solar projects in Ohio are generally defined by generation capacity rather than technology alone. The Ohio Power Siting Board (OPSB) — the primary state agency for large energy facility review — holds jurisdiction over solar generating facilities with a nameplate capacity of 50 MW or greater (Ohio Revised Code §4906.01 et seq.). Projects below 50 MW but above 1 MW typically fall under county-level permitting and, in some cases, review by the Public Utilities Commission of Ohio (PUCO).
For context on how solar energy systems are classified more broadly, the regulatory context for Ohio solar energy systems page outlines the full jurisdictional hierarchy from residential rooftop to utility-scale installations.
Project categories by capacity:
- Large commercial / industrial (1–49.9 MW): County zoning, conditional use permits, and local board review typically govern these projects. Interconnection is coordinated with distribution utilities or PJM Interconnection.
- Utility-scale (50 MW and above): Mandatory OPSB certificate of environmental compatibility and public need (CECPN) required before construction.
- Transmission-connected projects: Projects interconnecting at the transmission level (generally 69 kV and above) require PJM Interconnection's queue process in addition to state siting approval.
Scope limitations: This page addresses Ohio-specific regulatory and procedural frameworks. Federal permitting requirements — including those from the Federal Energy Regulatory Commission (FERC) for wholesale market participation — and multistate transmission planning conducted through PJM Interconnection fall outside the scope of Ohio state authority but interact with it. Projects on federally managed lands or tribal territories are not covered by OPSB jurisdiction.
How it works
Large-scale solar development in Ohio follows a phased process governed by multiple agencies. The OPSB process under ORC Chapter 4906 is the most structured pathway and serves as the model for understanding project development timelines.
Phase 1 — Site assessment and land control
Developers conduct geotechnical surveys, solar resource assessments, and title searches. Land is typically secured through 25–35 year lease agreements with agricultural landowners.
Phase 2 — Interconnection application
Developers submit an interconnection request to either the relevant distribution utility or PJM Interconnection, depending on the point of interconnection voltage. PJM's queue process involves feasibility, impact, and facilities studies before an interconnection agreement is executed.
Phase 3 — OPSB application (≥50 MW)
An application for a CECPN is filed with the OPSB. The application must include environmental assessments, visual impact studies, setback compliance documentation, noise analyses, decommissioning plans, and evidence of local government notification. OPSB holds mandatory public hearings in the host county.
Phase 4 — Local coordination (all projects)
Ohio counties may adopt solar zoning regulations that impose setback requirements, decommissioning bond requirements, and landscaping standards. As of the General Assembly's 2021 amendments to ORC §4906.20, county commissioners and township trustees gained formal authority to submit resolutions to OPSB that can influence certificate decisions for projects ≥50 MW.
Phase 5 — Construction and inspection
Construction must conform to the approved CECPN conditions. Electrical work follows the National Electrical Code (NEC, NFPA 70 2023 edition), and inverter systems must comply with IEEE Standard 1547 for interconnection with the grid. Ohio's State Fire Marshal has authority over fire safety compliance for large battery storage co-located with solar arrays.
Phase 6 — Commercial operation and compliance
Ongoing compliance with PUCO and OPSB conditions, environmental mitigation commitments, and PJM operating requirements governs the commercial operation period. Projects generating Solar Renewable Energy Credits (SRECs) must register through the Ohio solar renewable energy credits program administered under Ohio's Renewable Portfolio Standard.
For a conceptual grounding in how Ohio solar systems generate and export power, the how Ohio solar energy systems work overview provides foundational technical context.
Common scenarios
Three project configurations represent the dominant development patterns in Ohio's large-scale solar market:
Ground-mount solar farms on agricultural land
The most common typology in Ohio, these projects are sited on flat, tile-drained farmland in the western and central regions of the state. Typical array sizes range from 100 MW to 500 MW. Agrivoltaic configurations — where crops or livestock grazing coexist with panel rows — are an emerging subset reviewed under the same OPSB framework.
Industrial-site brownfield redevelopment
Former industrial properties, landfill caps, and reclaimed mine lands are eligible for ground-mount solar under Ohio EPA brownfield guidance. These sites may carry environmental covenants that restrict ground disturbance, requiring ballasted racking systems rather than driven piles.
Utility-scale solar with battery storage
Co-located battery energy storage systems (BESS) are increasingly paired with utility-scale solar to capture capacity market revenues through PJM. BESS additions trigger separate OPSB review and Ohio State Fire Marshal compliance under NFPA 855, the Standard for the Installation of Stationary Energy Storage Systems.
Decision boundaries
Understanding which regulatory pathway applies to a given project is the central decision point for developers and local stakeholders.
| Project size | Primary regulatory body | Key instrument |
|---|---|---|
| < 1 MW | Local zoning authority | Building and electrical permits |
| 1 MW – 49.9 MW | County commissioners / PUCO | Conditional use permit; distribution interconnection |
| ≥ 50 MW | Ohio Power Siting Board | Certificate of Environmental Compatibility and Public Need |
Additional decision factors include:
- Interconnection voltage: Projects connecting at transmission voltage (69 kV+) must use PJM's interconnection process regardless of project size.
- Federal tax credit eligibility: The Inflation Reduction Act's Investment Tax Credit (ITC) for large solar projects involves prevailing wage and apprenticeship requirements that influence construction labor decisions; OPSB approvals do not govern ITC eligibility, which is administered by the Internal Revenue Service.
- County resolutions under ORC §4906.20: A resolution of disapproval from county commissioners shifts the OPSB evidentiary burden and can delay or modify a certificate, but does not constitute an absolute veto for projects of regional significance.
- Decommissioning bonds: OPSB requires developers to post decommissioning financial assurance. Bond amounts vary by project scale and are reviewed periodically against decommissioning cost estimates.
For projects that include ground-mount structures or carport configurations on industrial or institutional properties, the solar carports and ground-mount systems in Ohio page covers structural and permitting distinctions. The broader Ohio solar energy statistics and data resource provides installed capacity benchmarks useful for understanding where individual projects fit within the state's generation portfolio. The Ohio solar authority home provides entry-point navigation to all topic areas in this reference.
References
- Ohio Revised Code Chapter 4906 — Power Siting Board
- Ohio Power Siting Board (OPSB)
- Public Utilities Commission of Ohio (PUCO)
- PJM Interconnection — Generator Interconnection
- Federal Energy Regulatory Commission (FERC) — Interconnection Rules
- IEEE Standard 1547-2018 — Interconnection and Interoperability of Distributed Energy Resources
- NFPA 855 — Standard for the Installation of Stationary Energy Storage Systems
- National Electrical Code (NFPA 70, 2023 edition)
- U.S. Department of Energy — Utility-Scale Solar
- Ohio General Assembly — ORC §4906.20 (2021 amendments)