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City of Columbus interconnection application

City of Columbus is a municipal utility serving 15,346 residential customers in Ohio (EIA-861, 2025). Gridpol files City of Columbus interconnection applications for licensed installers – solar, storage and EV chargers – with single-line diagram and site plan, unlimited for $500 a month.

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Ohio’s commission rule (Ohio Adm.Code Chapter 4901:1-22 (Interconnection Services), rules 4901:1-22-01 to -10; R.C. 4928.11, 4928.67) does not bind municipal utilitys; City of Columbus sets its own interconnection policy. We confirm its form on the first project. Municipal electric systems and rural electric cooperatives are not EDUs under PUCO jurisdiction; they set their own interconnection and net metering policies.

City of Columbus at a glance

Utility

City of Columbus

Type

Municipal utility

EIA utility ID

4065

Residential customers

15,346 (EIA-861, 2025)

Net-metered residential customers

9 (EIA-861, 2025)

Service territory

1 county in Ohio

Wholesale supplier / association

American Municipal Power, Inc. (AMP)

Documents City of Columbus asks for

  • Interconnection application formFilled in by us from your project data in the utility’s portal or on its form. Gridpol prepares this.
  • Single-line diagram (one-line)Drawn by us from your equipment data: modules, strings, inverter, battery, disconnects, point of interconnection, meter. Gridpol prepares this.
  • Site plan / site layoutDrawn by us from your roof sketch or photos: array, inverter, battery, disconnect, meter and main panel locations. Gridpol prepares this.
  • PV module spec sheetManufacturer data sheet of the modules.
  • Inverter spec sheetManufacturer data sheet (string inverter, microinverter or hybrid inverter).
  • Customer signatureThe account holder signs the application or authorization. We send the signature link.
  • Recent electric billName, service address, account and meter number must match the application.
  • Final inspection sign-offApproved electrical inspection from the authority having jurisdiction after installation.

Typical documents for US utilities – not yet verified for City of Columbus. We confirm City of Columbus’s exact list on the first project.

Ohio interconnection rule

Commission

Public Utilities Commission of Ohio (PUCO)

Interconnection rule

Ohio 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 to

Electric 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 form

Uniform 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.

Timelines

Receipt/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.

Fees

Level 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.

Insurance

EDU 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 disconnect

Required: 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 compensation

NEM – 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.

Not bound by the rule

Municipal electric systems and rural electric cooperatives are not EDUs under PUCO jurisdiction; they set their own interconnection and net metering policies.

Other utilities in Ohio

All Ohio utilities →

Gridpol Unlimited

$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
Get started

Applications are typically submitted within 2 business days after complete documents. Utility review times are set by each utility.

Get started – $500/month unlimited