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Investor-owned utility

Xcel Energy (Wisconsin/Michigan) interconnection application

Xcel Energy (Wisconsin/Michigan) is an investor-owned utility serving 230,313 residential customers in Michigan, Wisconsin (EIA-861, 2025). Applications: Own online portal (Xcel Energy DER interconnection portal (WI)). Gridpol files Xcel Energy (Wisconsin/Michigan) 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. Not verified: Xcel WI info sheets confirm applications follow PSC 119 and name SolarProgramWI@xcelenergy.com for interconnection questions, but the WI portal URL, document checklist and fee were not retrievable. Michigan (NSP-WI MI territory) process not researched.

Xcel Energy (Wisconsin/Michigan) at a glance

Utility

Northern States Power Co (Xcel Energy)

Type

Investor-owned utility

EIA utility ID

13780

Residential customers

230,313 (EIA-861, 2025)

Net-metered residential customers

789 (EIA-861, 2025)

Service territory

2 counties in Michigan, 28 counties in Wisconsin

How to apply

Own online portal – Xcel Energy DER interconnection portal (WI)

Who submits

Customer or installer; all new applications must be submitted through Xcel's portal. Have most recent bill (permanent account and premise numbers).

Export compensation

NEM – Pg-1 Net Energy Billing
Monthly excess banked; year-end excess paid at on-/off-peak energy prices WI Solar Net Metering info sheet: excess kWh credited at the current cogeneration rate, netted annually (Jan 1-Dec 31) and paid by check in Q1 of following year.

Review time (official)

Per PSC 119 timelines (not extracted).

Documents Xcel Energy (Wisconsin/Michigan) asks for

  • Interconnection application formPSC 119 interconnection application via portal Gridpol prepares this.
  • Recent electric billAccount and premise numbers from recent bill
  • Single-line diagram (one-line)per PSC 119 (verify) Gridpol prepares this.
  • Battery spec sheet (when applicable)Xcel WI Energy Storage Interconnect Guidelines apply

How the Xcel Energy (Wisconsin/Michigan) process runs

  1. Submit interconnection application in Xcel portal
  2. Engineering review under PSC 119
  3. Do not start construction until full approval and signed agreements
  4. Install and inspect
  5. Bi-directional meter installed; parallel operation

Fees

FeeApplies toNote
$300Optional pre-application reportnon-refundable

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

Size levels and limits

LevelUp toNote
PSC 119 Category 120 kWWis. Admin. Code PSC 119
Category 2200 kW
Category 31000 kW
Category 415000 kW
Net metering cap100 kW

Pg-1 net energy billing ≤100 kW-AC; >40 kW AC needs separate production meter

Storage, EV and stamps

Battery storage

Xcel publishes 'Guidelines for Interconnection of Electric Energy Storage' (WI v1.0).

Common issues the utility lists

  • Temporary (non-permanent) account/premise numbers

Gridpol’s pre-submission check covers these before we file.

Sources

Wisconsin interconnection rule

Commission

Public Service Commission of Wisconsin

Interconnection rule

Wis. Admin. Code ch. PSC 119 (implements s. 196.496, Stats.) – Rules for Interconnecting Distributed Generation Facilities · source

Applies to

All electric public utilities (investor-owned and municipal utilities, which are public utilities under ch. 196) for DG facilities <=15 MW on their distribution systems. Electric cooperatives are not public utilities under ch. 196 and are not covered.

Application form

Statewide standard forms: Form 6031 Wisconsin Standard Distributed Generation Application (+ technology supplements: solar PV, wind, energy storage, generator, change of ownership); Form 6029 Interconnection Agreement (<=20 kW), Form 6030 (20 kW-15 MW); pre-application Forms 6032/6033 (all dated 2024-05-01)

Timelines

Utility furnishes guidelines and standard form within 5 working days of request; completeness notice within 10 working days of application + fee; application review within 10 working days of completeness (if no engineering review needed, applicant may install); applicant has 15 working days to accept engineering review estimate; engineering review 10/15/20/40 working days for Cat. 1/2/3/4; distribution study 10/15/20 working days (Cat. 1-3). Modifications: advance notice 20/40/60 working days; utility response 20/40/60/60 working days or deemed approved.

Fees

Table PSC 119.08-1: Cat. 1 $150 (1-8 kW) or $300 (9-20 kW); Cat. 2 $300 + $10/kW; Cat. 3 $2,000 + $2/kW; Cat. 4 $4,000 + $0.50/kW; engineering review and distribution study cost-based; commissioning fee $150/$250/$1,000/$2,500. Utility may waive.

Insurance

Minimum liability insurance per occurrence: Cat. 1 $300,000; Cat. 2 $1,000,000; Cat. 3 $2,000,000; Cat. 4 negotiated. Cat. 2-4 must name the utility as additional insured. Alternative financial responsibility by mutual agreement.

External disconnect

Utility may require a lockable, visible-break interconnection disconnect switch opening all ungrounded poles, accessible at all times and labeled 'Interconnection Disconnect Switch' (PSC 119.20(3)-(4)); one-line diagram and site plan must show the switch location.

Export compensation

Utility-specific – No statewide net metering statute; PSC-approved parallel generation / net metering tariffs of each utility
PSC: net metering available to customers of investor-owned and municipal utilities below a utility-specific size threshold; buyback rates set in each utility's parallel generation tariff.

Not bound by the rule

Municipal utilities are bound by PSC 119 and file PSC-approved tariffs. Electric cooperatives are not PSC-regulated public utilities and set their own interconnection and net metering/buyback policies.

Other utilities in Wisconsin

All Wisconsin 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