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Investor-owned utility

CenterPoint Energy Indiana South interconnection application

CenterPoint Energy Indiana South is an investor-owned utility serving 134,700 residential customers in Indiana (EIA-861, 2025). Applications: PDF + email (CenterPoint New Service (fillable PDF with 'Submit Application' button, email or fax 888-287-2770)). Gridpol files CenterPoint Energy Indiana South 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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Process verified from CenterPoint Energy Indiana South’s official sources (see below). Portal (email), documents and steps confirmed from official pages. Verify on first project: whether the 25 kW Level 1 threshold (RM 24-01) is in effect at CEI South.

CenterPoint Energy Indiana South at a glance

Utility

Southern Indiana Gas & Elec Co (CenterPoint Energy)

Type

Investor-owned utility

EIA utility ID

17633

Residential customers

134,700 (EIA-861, 2025)

Net-metered residential customers

836 (EIA-861, 2025)

Service territory

7 counties in Indiana

How to apply

PDF + email – CenterPoint New Service (fillable PDF with 'Submit Application' button, email or fax 888-287-2770) · official link

Who submits

Customer is the applicant (customer name on application; facility must be owned and operated by customer on customer's property). Contractor/installer section on form; installer may prepare/submit the package. Phone 800-990-1930.

Export compensation

Net billing – Rider EDG (SIGECO Electric Tariff I.U.R.C. No. E-13)
Exports credited at prior-year average wholesale rate x 125%, updated each March 1; legacy net metering grandfathered to 2032/2047.

Review time (official)

170 IAC 4-4.3 Level 1: completeness notice within 10 business days; approval/denial within 15 business days after complete; agreement within 10 business days after approval; customer returns agreement >=10 business days before operation. CEI South checklist: give 10 days' notice before operation for inspection.

Wholesale supplier / association

Hoosier Energy

Documents CenterPoint Energy Indiana South asks for

  • Interconnection application formCustomer Generation Application for Interconnection (Levels 1-3), inverter-based form CNP-1572 (3-2026) or non-inverter form; includes battery questions Gridpol prepares this.
  • Single-line diagram (one-line)Single-line from generator to point of interconnection incl. inverters, batteries, switches, breakers; must show CEI South metering, panel and switch ratings; disconnect lock/location notes if disconnect required Gridpol prepares this.
  • Site plan / site layoutSite plan/drawing with location of major equipment Gridpol prepares this.
  • Inverter spec sheetManufacturer, model, AC rating, operating manual or link
  • Battery spec sheet (when applicable)If battery: manufacturer, model, energy rating, operating manual or link
  • UL 1741 / IEEE 1547 certificationListing by nationally recognized testing lab (UL 1741 / IEEE 1547)
  • Other utility-specific document (when applicable)Control drawings for relays/breakers, relay settings, transformer data (as applicable); description of operating modes
  • Proof of insuranceProof of insurance per 170 IAC 4-4.3-10 before execution of interconnection agreement
  • Interconnection agreementIssued by CenterPoint; signed by both parties before interconnecting
  • Final inspection sign-off (when applicable)Local electrical inspection where required by locality; CEI South field inspection if required

How the CenterPoint Energy Indiana South process runs

  1. Design system; submit completed application with SLD, specs and certifications before purchase/installation (email newservice@centerpointenergy.com).
  2. CenterPoint review and approval.
  3. Provide proof of insurance; sign Interconnection Agreement (both parties).
  4. Install; obtain local electrical inspection where required.
  5. Notify CEI South at least 10 days before operation; CEI South field inspection if required.
  6. Bi-directional meter set; Permission to Operate (PTO) - do not energize before.

Fees

FeeApplies toNote
$0Level 1 and applicable Level 2Per CenterPoint page; 170 IAC 4-4.3-4(e) allows Level 2 up to $50 + $1/kW, Level 3 up to $100 + $2/kW plus study costs

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

Size levels and limits

LevelUp toNote
Level 125 kWCertified inverter-based; 10 kW before IURC RM 24-01 final rule (LSA #25-368, raises to 25 kW, effective 30 days after filing)
Level 22000 kWCertified equipment
Level 3All others
Net metering cap1000 kW

Rider EDG eligibility: total generator/inverter ratings <=1,000 kW, owned and operated by customer; size should match typical usage (IC 8-1-40-3).

Storage, EV and stamps

Battery storage

Application asks whether a battery is included, battery make/model and kWh, intended operation and backup use; battery spec and operating manual required; SLD must show battery systems.

Sources

Other utilities in Indiana

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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