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Investor-owned utility

Duke Energy Indiana interconnection application

Duke Energy Indiana is an investor-owned utility serving 808,572 residential customers in Indiana (EIA-861, 2025). Gridpol files Duke Energy Indiana 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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Partly researched from official sources. Only the 2019 IURC filing could be read (application package needed for a Project Number, contacts). duke-energy.com blocks our server/WebFetch and archive captures lack Indiana content; Indiana Admin. Code site not machine-readable. Verify on first project: current portal (online vs e-mail), Level 2/3 fees (170 IAC 4-4.3), insurance, review timelines, storage rules, EDG rider terms and PTO/meter steps.

Duke Energy Indiana at a glance

Utility

Duke Energy Indiana, LLC (Duke Energy)

Type

Investor-owned utility

EIA utility ID

15470

Residential customers

808,572 (EIA-861, 2025)

Net-metered residential customers

4,228 (EIA-861, 2025)

Service territory

71 counties in Indiana

Who submits

Customer or installer submits Level 1 or Level 2/3 interconnection application to Duke Energy's Renewables Service Center (866-233-2290, CustomerOwnedGeneration@duke-energy.com, Mon-Fri 8-5). Agent/LOA rules not confirmed.

Export compensation

Net billing – Excess Distributed Generation (EDG)
Net metering tariff closed to new customers (Indiana SEA 309).

Documents Duke Energy Indiana asks for

  • Interconnection application formLevel 1 (inverter-based <=10 kW) or Level 2-3 (Standard Contract Rider No. 80 / 80-A) Gridpol prepares this.
  • Single-line diagram (one-line)Legible one-line diagram Gridpol prepares this.
  • Site plan / site layoutLegible site map Gridpol prepares this.
  • PV module spec sheetManufacturer data sheet of the modules.
  • Inverter spec sheetManufacturer data sheet (string inverter, microinverter or hybrid inverter).
  • Proof of insurance (when applicable)At least $100,000 liability coverage per tariff (not confirmed from current official page)
  • Other utility-specific document (when applicable)Non-inverter systems: control drawings and protective relay settings (not confirmed from current official page)

How the Duke Energy Indiana process runs

  1. Submit complete Interconnection Application with fee (Levels 2 and 3 only), legible one-line diagram, legible site map, inverter and panel spec sheets.
  2. Duke issues a Project Number once the application is complete; projects are studied in order of Project Number.
  3. Technical review; fully executed Interconnection Agreement.
  4. Install, inspection and meter set (details not confirmed).

Fees

FeeApplies toNote
$0Level 1 (<=10 kW inverter-based)
Fee appliesLevel 2 and 3amount not confirmed

Utility fees are paid by the installer or customer; they are not part of the Gridpol plan.

Size levels and limits

LevelUp toNote
Level 110 kWinverter-based
Level 2-31000 kWEDG behind-the-meter max 1 MW
Net metering cap1000 kW

Sources

Indiana interconnection rule

Commission

Indiana Utility Regulatory Commission (IURC)

Interconnection rule

170 IAC 4-4.3 (as amended by LSA #25-368, IURC RM #24-01) – Interconnection of customer facilities · source

Applies to

Investor-owned electric utilities subject to IURC jurisdiction (170 IAC 4-4.3-2). Municipal utilities and electric cooperatives are not covered.

Application form

Commission-approved interconnection application and interconnection agreement forms, used by each IOU (170 IAC 4-4.3-4(c)).

Timelines

Level 1/2: completeness notice 10 business days; determination 15 business days after complete; executable agreement 10 business days after approval; customer returns executed agreement at least 10 business days before operation; final approval after executed agreement and any inspection, conditioned on electrical code official approval (170 IAC 4-4.3-6, -7).

Fees

Level 1: no fee. Level 2: <= $50 + $1/kW nameplate (+ minor modifications/additional review, engineering <= $100/h). Level 3: <= $100 + $2/kW + study time (<= $100/h) (170 IAC 4-4.3-4(e)).

Insurance

Net metering facilities: liability coverage of at least $100,000 (homeowners, commercial or other); utility may not require higher limits or additional policies (170 IAC 4-4.2-8, referenced by 4-4.3-10(a)). Other customer facilities: only reasonable amounts of insurance against reasonably likely risks, mutual indemnification (170 IAC 4-4.3-10(b)).

External disconnect

Utility may require the applicant to include a disconnect switch as a supplement to the equipment package (170 IAC 4-4.3-4(d)).

Export compensation

Net billing – IC 8-1-40 (P.L.264-2017, SEA 309); 170 IAC 4-4.2 (net metering rule, legacy)
Net metering tariffs closed to new customers after June 30, 2022 (IC 8-1-40-11); legacy NEM customers continue per IC 8-1-40-13/-14. New distributed generation (<= lesser of 1 MW or average annual consumption, IC 8-1-40-3) is credited for excess distributed generation (instantaneous difference, IC 8-1-40-5) at 1.25 x the supplier's average marginal price of electricity of the prior year (IC 8-1-40-17). Applies to IURC-regulated public utilities; excludes municipally owned utilities and certain cooperatives (IC 8-1-40-4).

Not bound by the rule

Municipal utilities and REMC/electric cooperatives are not bound by 170 IAC 4-4.3 or IC 8-1-40 (IC 8-1-40-4 excludes them) and set their own interconnection and DG policies (many through Hoosier Energy / Wabash Valley Power member policies, not reviewed).

Other utilities in Indiana

All Indiana 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