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Investor-owned utility

Montana-Dakota Utilities interconnection application

Montana-Dakota Utilities is an investor-owned utility serving 120,678 residential customers in Montana, North Dakota, South Dakota, Wyoming (EIA-861, 2025). Gridpol files Montana-Dakota Utilities 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. verify on first project: montana-dakota.com (pages and tariff PDFs) returns 403 to all our fetchers and archive.org is unreachable; submission route, documents, fees, levels, steps and per-state tariffs (MT Rate 92/96, ND Rate 140, SD ARSD 20:10:36, WY) still to be confirmed with Montana-Dakota (Bismarck, 701-222-7900).

Montana-Dakota Utilities at a glance

Utility

Montana-Dakota Utilities Co (MDU Resources Group)

Type

Investor-owned utility

EIA utility ID

12199

Residential customers

120,678 (EIA-861, 2025)

Net-metered residential customers

215 (EIA-861, 2025)

Service territory

11 counties in Montana, 29 counties in North Dakota, 13 counties in South Dakota, 2 counties in Wyoming

Export compensation

NEM – Montana: Net Metering Service Rate 92; Small Generator Interconnection Rate 96
Montana only, per search-index text of tariff PDFs (bi-directional meter, one net metering system per metered service). ND (Rate 140 small qualifying facilities), SD, WY tariffs not confirmed.

Documents Montana-Dakota Utilities asks for

  • Interconnection application formMontana: Small Generator Facility Level 1 Interconnection Request (tariff Rate 96) with Addendum A Net Metering Rate Request (Rate 92); separate Level 2 and Level 3 & 4 forms. Per search-index text only; other states not seen. Gridpol prepares this.

Fees

FeeApplies toNote
Montana Level 1Form states application fee must be paid before processing; amount not retrieved (Rate 96).

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

Size levels and limits

LevelUp toNote

Not retrieved.

Sources

North Dakota interconnection rule

Commission

North Dakota Public Service Commission (PSC)

Interconnection rule

N.D. Admin. Code ch. 69-09-07 (Small Power Production and Cogeneration, PURPA implementation), esp. 69-09-07-11 Interconnection costs – Small Power Production and Cogeneration · source

Applies to

Sales/purchases between PURPA qualifying facilities and 'electric public utilities' under PSC jurisdiction (NDCC 49-03-01.5) - investor-owned utilities (Xcel/NSP, MDU, Otter Tail). Rural electric cooperatives and munis are not PSC rate-regulated.

Application form

No statewide interconnection application/standard in the Administrative Code; utility-specific tariffs and forms.

Fees

QF pays interconnection costs the commission may assess on a nondiscriminatory basis; reimbursement may be spread over time (69-09-07-11). No fee caps.

Export compensation

NEM – N.D. Admin. Code 69-09-07-09(3)(a)
QFs <=100 kW design capacity entitled to net energy billing (meter reverses); utility may recover production-monitoring metering costs. Applies to PSC-regulated IOUs only; Legislative Council committee objection filed 1991 (rule remains). Netting period (monthly/annual) set in utility tariffs.

Not bound by the rule

Rural electric cooperatives and municipal utilities are not covered by the PSC net billing rule or any state interconnection standard; they follow their own policies and federal PURPA obligations.

Other utilities in North Dakota

All North Dakota 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