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City of Harbor Springs interconnection application

City of Harbor Springs is a municipal utility serving 3,858 customers in Michigan (EIA-861, 2025). Gridpol files City of Harbor Springs 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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Michigan’s commission rule (Mich. Admin. Code R 460.901a - R 460.1016 (MIXDG: Interconnection and Distributed Generation Standards)) does not bind municipal utilitys; City of Harbor Springs sets its own interconnection policy. We confirm its form on the first project. Member-regulated cooperatives are covered by the interconnection rules (R 460.901a(v)). Municipal utilities are not covered and use their own policies.

City of Harbor Springs at a glance

Utility

City of Harbor Springs

Type

Municipal utility

EIA utility ID

8083

Customers

3,858 (EIA-861, 2025, short form: all customer classes)

Net-metered residential customers

none reported

Service territory

1 county in Michigan

Documents City of Harbor Springs 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 Harbor Springs. We confirm City of Harbor Springs’s exact list on the first project.

Michigan interconnection rule

Commission

Michigan Public Service Commission

Interconnection rule

Mich. Admin. Code R 460.901a - R 460.1016 (MIXDG: Interconnection and Distributed Generation Standards) – Michigan Interconnection and Distributed Generation Standards · source

Applies to

Rate-regulated electric utilities (IOUs and rate-regulated cooperatives), member-regulated cooperatives (for R 460.901a-460.992), and alternative electric suppliers; not municipal utilities

Application form

Utility-specific interconnection application/procedures filed with MPSC per rule (online application allowed); Commission-approved standard Level 1-3 interconnection agreement (Case U-21543)

Timelines

Acknowledge receipt by end of 3rd business day; completeness determination within 10 business days; applicant 60 business days to cure (2 submissions), utility 10 BD per resubmission (R 460.936). Fast track initial review 10 BD (Levels 1-2) / 20 BD (Levels 3-5) (R 460.946). Facilities study 80 BD (R 460.962). DG-program customers must complete installation within 6 months of complete application (R 460.1006).

Fees

Pre-application report <=$300; non-export and fast track $100 + $1/kWac certified or $100 + $2/kWac non-certified; supplemental review <=$1,000; study scoping <=$300; SIS <=$10,000; facilities study <=$15,000 (R 460.926). DG program application fee <=$50 (R 460.1006).

Insurance

Level 1 and 2: utility may not require additional liability insurance or being named additional insured. Minimum general liability: Level 3 $1,000,000; Level 4 $2,000,000; Level 5 $3,000,000 (R 460.986).

External disconnect

Not found in reviewed rule sections; per utility interconnection procedures.

Export compensation

Net billing – MCL 460.1173 et seq. (Distributed Generation Program); R 460.1001-460.1016
DG program (inflow/outflow billing) replaced legacy net metering; outflow credited at a rate below full retail set per utility. Category sizes/caps per statute; detail not verified here.

Not bound by the rule

Member-regulated cooperatives are covered by the interconnection rules (R 460.901a(v)). Municipal utilities are not covered and use their own policies.

Other utilities in Michigan

All Michigan 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