Ohio interconnection applications
117 electric utilities serve Ohio (EIA-861, 2025): 7 investor-owned utilitys, 25 electric cooperatives, 85 municipal utilitys. Together they serve 4,977,494 residential customers; 29,999 residential customers were on net metering at year-end 2025.
Largest utilities in Ohio
Investor-owned utility · 1,348,588 residential customers · Ohio
Applications: PowerClerk – AEP PowerClerk
Interconnection process and documents →Investor-owned utility · 961,084 residential customers · Ohio
Applications: Own online portal – FirstEnergy Interconnection Portal
Interconnection process and documents →Investor-owned utility · 700,265 residential customers · Ohio
Interconnection process and documents →Investor-owned utility · 677,581 residential customers · Ohio
Applications: Own online portal – FirstEnergy Interconnection Portal
Interconnection process and documents →Investor-owned utility · 469,317 residential customers · Ohio
Applications: PowerClerk – AES Ohio Interconnection (PowerClerk)
Interconnection process and documents →Investor-owned utility · 279,678 residential customers · Ohio
Applications: Own online portal – FirstEnergy Interconnection Portal
Interconnection process and documents →Electric cooperative · 118,458 residential customers · Ohio
Applications: PDF + email – Utility-prepared interconnection application via Energy Advisors
Interconnection process and documents →Municipal utility · 64,905 residential customers · Ohio
Interconnection process and documents →Municipal utility · 27,209 residential customers · Ohio
Interconnection process and documents →Electric cooperative · 26,038 residential customers · Ohio
Interconnection process and documents →Municipal utility · 24,256 residential customers · Ohio
Interconnection process and documents →Electric cooperative · 17,091 residential customers · Ohio
Interconnection process and documents →Export compensation among the researched Ohio utilities: NEM, Net billing. Rules differ by utility – see each utility page.
Ohio interconnection rule
Public Utilities Commission of Ohio (PUCO)
Interconnection ruleOhio Adm.Code Chapter 4901:1-22 (Interconnection Services), rules 4901:1-22-01 to -10; R.C. 4928.11, 4928.67 – Interconnection Services · source
Applies toElectric distribution utilities (EDUs: AEP Ohio, Duke Energy Ohio, AES Ohio, FirstEnergy's Ohio Edison/CEI/Toledo Edison), which must file uniform interconnection service tariffs (4901:1-22-02). Municipal utilities and cooperatives are not PUCO-regulated EDUs.
Application formUniform statewide approach: 'short form' application for DER <= 25 kW with IEEE 1547/UL 1741 certified equipment, standard application otherwise, filed with the EDU (4901:1-22-05); standard interconnection agreement per 4901:1-22-10.
TimelinesReceipt/completeness notice within 10 business days (4901:1-22-04); Level 1 review 15 BD, Level 2 20 BD after complete application; interconnection agreement within 5 BD of approval; interconnection within 10 BD after required upgrades complete. Pre-application report $300, within 10 BD.
FeesLevel 1 <= $50 (waivable); Level 2 <= $50 + $1/kW (+ $2,500 supplemental review deposit if elected); Level 3 <= $100 + $2/kW + actual study costs; pre-application report $300.
InsuranceEDU may not require liability insurance beyond proof of insurance or another financial instrument covering the applicant's responsibilities under the tariff, and may not require a particular agent/broker (4901:1-22-10(E)). No dollar amounts specified.
External disconnectRequired: DER must have a disconnect switch outside the equipment package, accessible to and lockable by EDU personnel, clearly labeled as DER disconnect, provided and paid for by the applicant (4901:1-22-05).
Export compensationNEM – R.C. 4928.67; Ohio Adm.Code 4901:1-10-28 (eff. Apr. 8, 2024)
No fixed kW cap: system may not exceed 120% of customer's requirements (3-year average). Monthly excess credited at the energy component of the EDU's standard service offer, carried forward; no cash-out required. EDUs must offer standard and hospital net metering tariffs; CRES providers optional.
Municipal electric systems and rural electric cooperatives are not EDUs under PUCO jurisdiction; they set their own interconnection and net metering policies.
| Level | Up to | Criteria / review / fee |
|---|---|---|
| Level 1 (4901:1-22-06) | 25 kW | Inverter-based, certified to IEEE 1547 / UL 1741, nameplate <= 25 kW, meeting approval criteria in (B)(1) · 15 business days after complete application; agreement within 5 business days · Up to $50 (may be waived) |
| Level 2 (4901:1-22-07) | 5000 kW | Certified inverter-based; nameplate limits by line voltage: <=5 kV 500 kW (<2 MW on 600 A line within 2.5 feeder mi); 5-15 kV 2 MW (<3 MW); 15-30 kV 3 MW (<4 MW); 30-69 kV 4 MW (<5 MW) · 20 business days after complete; supplemental review 25 business days after $2,500 deposit · Up to $50 + $1/kW; supplemental review deposit $2,500 trued-up to actual |
| Level 3 (4901:1-22-08) | 20000 kW | Not qualifying for or failing Level 1/2, or non-certified equipment, nameplate <= 20 MW; scoping meeting, feasibility/system impact/facilities studies · Agreement within 5 business days after studies complete and costs collected · Up to $100 + $2/kW plus actual study and modification costs |
- OAC 4901:1-22-02 Scope and application: https://www.law.cornell.edu/regulations/ohio/Ohio-Admin-Code-4901-1-22-02 (retrieved 2026-11-13)
- OAC 4901:1-22-04 General provisions: https://www.law.cornell.edu/regulations/ohio/Ohio-Admin-Code-4901-1-22-04 (retrieved 2026-11-13)
- OAC 4901:1-22-05 Application requirements: https://www.law.cornell.edu/regulations/ohio/Ohio-Admin-Code-4901-1-22-05 (retrieved 2026-11-13)
- OAC 4901:1-22-06 Level 1 review: https://www.law.cornell.edu/regulations/ohio/Ohio-Admin-Code-4901-1-22-06 (retrieved 2026-11-13)
- OAC 4901:1-22-07 Level 2 review: https://www.law.cornell.edu/regulations/ohio/Ohio-Admin-Code-4901-1-22-07 (retrieved 2026-11-13)
- OAC 4901:1-22-08 Level 3 review: https://www.law.cornell.edu/regulations/ohio/Ohio-Admin-Code-4901-1-22-08 (retrieved 2026-11-13)
- OAC 4901:1-22-10 Interconnection agreements: https://www.law.cornell.edu/regulations/ohio/Ohio-Admin-Code-4901-1-22-10 (retrieved 2026-11-13)
- OAC 4901:1-10-28 Net metering: https://www.law.cornell.edu/regulations/ohio/Ohio-Admin-Code-4901-1-10-28 (retrieved 2026-11-13)
All 117 utilities in Ohio
- AEP Ohio1,348,588
- Ohio Edison961,084
- Duke Energy700,265
- The Illuminating Company677,581
- AES Ohio469,317
- Toledo Edison279,678
- South Central Power118,458
- City of Cleveland64,905
- City of Hamilton27,209
- Licking Rural Electric Inc.26,038
- City of Cuyahoga Falls24,256
- Consolidated Cooperative17,091
- Pioneer Rural Electric Cooperative, Inc.16,384
- Buckeye Rural Electric Cooperative, Inc.16,056
- City of Westerville15,791
- Guernsey-Muskingum El Cooperative Inc.15,349
- City of Columbus15,346
- Lorain-Medina R E C, Inc.15,298
- Holmes-Wayne Electric Cooperative Inc.14,793
- City of Bowling Green13,114
- Union Rural Electric Cooperative, Inc.12,392
- City of Wadsworth12,296
- City of Niles11,889
- Butler Rural Electric Cooperative Inc.11,531
- Hancock-Wood Electric Cooperative Inc.11,292
- City of Painesville10,851
- Midwest Electric, Inc.10,830
- City of Piqua9,802
- Paulding-Putman Electric Cooperative, Inc.9,153
- City of Lebanon8,852
- North Central Electric Cooperative, Inc.8,431
- City of Celina7,726
- City of Orrville6,327
- City of Dover5,870
- Clyde Light & Power2,785
- Midwest Energy Cooperative866
- Carroll Electric Cooperative, Inc.0
- Washington Electric Cooperative0
- Firelands Electric Cooperative, Inc.0
- Frontier Power Company0
- Mid-Ohio Energy Cooperative, Inc.0
- Adams Rural Electric Cooperative, Inc.0
- City of Hudson0
- City of Amherst0
- City of Napoleon0
- North Western Electric Cooperative, Inc.0
- City of Galion0
- City of Bryan0
- City of Wapakoneta0
- City of Tipp City0
- City of Shelby0
- Darke Rural Electric Cooperative, Inc.0
- Logan County Cooperative Power & Light0
- Tricounty Rural Electric Cooperative, Inc.0
- City of Columbiana0
- City of Hubbard0
- City of St Marys0
- City of Jackson0
- City of Oberlin0
- City of St Clairsville0
- Village of Wellington0
- City of Newton Falls0
- Village of Montpelier0
- Village of Yellow Springs0
- Seville Board of Public Affairs0
- Village of Blanchester0
- Village of Georgetown0
- Village of Versailles0
- Village of Carey0
- Village of Lodi0
- City of Arcanum0
- Village of New Bremen0
- Village of Bethel0
- Village of Minster0
- Village of Oak Harbor0
- City of Woodsfield0
- Village of Grafton0
- Village of Genoa0
- Village of Edgerton0
- Village of Woodville0
- Village of Ripley0
- Village of Brewster0
- Village of Deshler0
- Village of Elmore0
- Village of Glouster0
- Village of Lakeview0
- Village of Monroeville0
- Village of Beach City0
- Village of Plymouth0
- Village of Pioneer0
- Village of Jackson Center0
- Prospect Corporation0
- Village of Pemberville0
- Village of Milan0
- Village of Haskins0
- Village of Bradner0
- Village of Marshallville0
- Village of Sycamore0
- Village of New Knoxville0
- Village of Waynesfield0
- Village of Ohio City0
- Village of Lucas0
- City of Mendon0
- Village of Republic0
- Village of Arcadia0
- Village of Bloomdale0
- Village of Shiloh0
- Village of Eldorado0
- Village of Cygnet0
- Village of Hamersville0
- South Vienna Corporation0
- Village of Tontogany0
- Village of Wharton0
- City of Custar0
- Village of Obetz0
- Ohio Valley Electric Corporation0
- Village of Greenwich0
Residential customers in Ohio per EIA-861 (2025). Customer counts = bundled + delivery-only service (EIA-861 Part A + Part D). Service territory is reported by county; a county can be served by several utilities.
$500 / month
Unlimited interconnection applications. 12-month agreement, signed online. The agreement starts the day you sign; first invoice right away, then monthly.
- Unlimited interconnection applications
- Single-line diagram and site plan for every application
- Pre-submission check against the utility’s requirements
- Homeowner e-signature link for the authorization
- Filing in your utility portal accounts or by the utility’s method
- Utility questions, corrections and resubmissions
- Follow-up through approval, inspection and PTO
- Customer list, exports, API and webhooks
Applications are typically submitted within 2 business days after complete documents. Utility review times are set by each utility.