Xcel interconnection requirements
Sample preview — compiled from public sources 2026-08-19
Who this applies to
Xcel Energy operates in eight states, and its interconnection rules are set state by state. This page covers Xcel's two largest distributed-solar territories — Colorado (Public Service Company of Colorado) and Minnesota (Northern States Power) — and keeps them separate throughout, because the processes and state rules differ. Xcel's Michigan, New Mexico, North Dakota, South Dakota, Texas, and Wisconsin territories are not covered here yet.
Colorado
- Customer-sited (behind-the-meter) solar and storage — net energy metering plus optional Solar*Rewards incentive participation, applied for through Xcel's Interconnection Application Portal.
- System sizing — the portal evaluates every application against the 200% Rule (system sized up to 200% of the customer's annual load).
- Community solar — Solar*Rewards Community gardens use the same portal but their program rules are out of scope for this page.
Minnesota
- Distributed energy resources of 10 MW and under — governed by the statewide Minnesota Distributed Energy Resource Interconnection Process (MN DIP), approved by the Minnesota PUC in 2019 under Minn. Stat. § 216B.1611.
- Net metering — Minnesota statute (Minn. Stat. § 216B.164) entitles systems of 40 kW or less to net metering compensation at the average retail rate.
- Solar*Rewards Minnesota — a separate, Minnesota-specific incentive program with its own annual funding, elected at interconnection.
Application pathway overview
Colorado
All Colorado DER interconnections — net energy metering, Solar*Rewards, and Solar*Rewards Community — are filed through Xcel's self-service Interconnection Application Portal. The portal collects the application details, e-signatures, fee payments, and document uploads, then moves the project through program review, completeness review, engineering review, and (if screens require) a study process. Engineering review uses size-based levels: Level 1 simplified screens for the smallest systems, Level 2 fast-track initial review screens with an optional supplemental review, and a Level 3 study process with a scoping meeting and system impact study for projects that fail screens or need upgrades.
Minnesota
Minnesota applications follow the statewide MN DIP framework (docket E999/CI-16-521) rather than the Colorado procedures. MN DIP defines three tracks, and the signed agreement is the standard MN DIA — or, for the smallest systems, the Uniform Statewide Contract, which serves as both the net metering contract and the interconnection agreement.
| State · Pathway | Typical projects | Review |
|---|---|---|
| CO · Net energy metering | Behind-the-meter solar and storage sized under the 200% Rule | Program review → completeness review → engineering review (Level 1/2 screens) |
| CO · Solar*Rewards / Solar*Rewards Community | Incentive-program participants | Same portal flow plus program deposit, production metering, and NABCEP form at final documentation |
| MN · MN DIP Simplified | Certified inverter-based DER no larger than 20 kW | Initial review screens; Uniform Statewide Contract on passing (~30 business days per the MPUC) |
| MN · MN DIP Fast Track | Projects needing more review but no major construction | Initial screens → supplemental review → optional facilities study (60+ business days) |
| MN · MN DIP Study | Larger projects or those requiring facility construction, up to 10 MW | Scoping meeting → system impact study → facilities study (90+ business days) |
Required forms & documents
Colorado
The structural contents of an Xcel Colorado DER packet, per Xcel's portal process guide. Which items apply depends on program, ownership, and whether storage is included; the guide's current revision governs.
- Application in the Interconnection Application Portal — contact information, system details, application details, permanent premise number (temporary accounts are not permitted)
- Engineering process fee, and the application deposit fee for Solar*Rewards / Solar*Rewards Community
- One-line diagram — installer name, address, complete AC and DC system specifications; meter collar adaptor documented on the diagram if one is used
- Site plan
- UL 1741 inverter listing
- 200% Rule support documentation when the automatic sizing check fails
- Solar Bank election form (Solar*Rewards and DG)
- Small Generator Interconnection Agreement (SGIA) for systems over 25 kW AC
- Meter collar waiver if using an approved meter collar adaptor
- Tenant and landlord release form for rental properties
- Energy storage declaration and battery details when storage is included
- At final documentation: electrical inspection approval, and the NABCEP form for Solar*Rewards applications
Minnesota
MN DIP standardizes the application content statewide; Xcel's Minnesota-specific forms and portal screens implement it. Structurally, a Minnesota packet includes:
- MN DIP interconnection application for the applicable track (Simplified for certified inverter-based systems of 20 kW or less) with the application fee
- One-line diagram and site/system technical details, including certified (listed) inverter documentation
- Signed agreement — Uniform Statewide Contract for the smallest systems, or the MN DIA with its cost estimate for interconnection equipment, metering, and any distribution upgrades (returned within 30 business days)
- Net metering election for systems of 40 kW or less under Minn. Stat. § 216B.164
- Solar*Rewards Minnesota program forms if participating confirm current revision
- Proof of electrical inspection before parallel operation is authorized confirm current revision
Fees
Fee structures differ by state. Colorado uses a size-based engineering process fee plus program deposits; Minnesota fees follow the MN DIP framework. Colorado figures below come from Xcel's 2022 portal process guide — treat every amount as revision-sensitive.
| State · Item | Published amount | Notes |
|---|---|---|
| CO · Engineering process fee — PV ≤ 10 kW AC | $100 verify current schedule | Non-refundable unless never reviewed by an engineer |
| CO · Engineering process fee — PV > 10–250 kW AC | $1,000 verify current schedule | Assessed on aggregate AC size for expansions |
| CO · Engineering process fee — PV > 250 kW–2 MW AC | $2,000 verify current schedule | Study-process fees additional if screens fail |
| CO · Solar*Rewards application deposit — Small (≤ 25 kW DC) | $250 verify current schedule | Refundable if completed within 12 months of payment |
| CO · Solar*Rewards application deposit — Medium (25.01–500 kW DC) | $1,500 verify current schedule | Refundable if completed within 18 months of payment |
| MN · MN DIP Simplified application fee | Up to $100 verify current schedule | Per the Minnesota PUC's MN DIP summary; Fast Track and Study tracks add supplemental review deposits and study costs |
| MN · Pre-application report | Up to $300 verify current schedule | Optional site-scoping report under MN DIP |
Filing here every month?
Design partners get 5 free filings and their territory encoded first — packets produced with dual human review while the software is built.
Typical timeline stages
Colorado
- Initiate application — installer enters project details in the portal; the 200% Rule is evaluated automatically (manual evaluations reviewed within 3 business days).
- Program review — high-level review of the site plan and one-line diagram within 2 business days of fee receipt.
- Completeness review — engineers check the plans against guidelines within 10 business days; subsequent re-reviews also carry a 10-business-day window.
- Engineering review — in-depth review within 10 business days for systems under 10 kW DC, 15 business days for larger systems; screen failures route into supplemental review or the study process.
- Interconnection agreements — Solar Agreements sent for signature; Xcel countersigns within 2 business days.
- Design, construction, and final documents — final electrical inspection (and NABCEP form for Solar*Rewards) uploaded; reviewed within 3 business days.
- Metering and PTO — meter technician attempts install/review within 20 business days of the meter request; PTO is given by door hanger at the meter, followed by an automated portal email.
Minnesota
- Application and completeness — MN DIP application submitted with the fee; the utility determines completeness or returns it.
- Track assignment and screens — Simplified (certified inverter-based, ≤ 20 kW; approximately 30 business days per the MPUC), Fast Track (60+ business days including supplemental review), or Study (90+ business days with scoping meeting, system impact study, and facilities study).
- Agreement — Uniform Statewide Contract for passing Simplified projects, or the MN DIA with cost estimates; signed agreements are due back within 30 business days.
- Construction, upgrades, and metering — any required interconnection equipment, metering, or distribution upgrades are built per the agreement.
- Parallel operation — authorization to operate follows completion of the agreement's conditions and inspection requirements.
Common deficiency causes
Common ways Xcel applications fall short of the published requirements above — each item is a requirement in Xcel's or the state commissions' cited documents whose absence stalls the application. Not drawn from SunDocket filing data.
- CO: one-line diagram missing the complete AC and DC system specifications, installer identification, or the meter collar adaptor notation
- CO: non-approved meter collar adaptors — applications using a collar not in the portal's approved database are rejected by metering engineering
- CO: applications filed against a temporary account instead of a permanent premise number
- CO: systems that fail the 200% Rule check without the required support documentation
- CO: missing SGIA on systems over 25 kW AC, or missing tenant/landlord release on rental properties
- CO: storage included but the energy storage declaration, battery details, or UL 1741 inverter listing not uploaded
- MN: applications for systems over 20 kW filed as Simplified when they belong in Fast Track or Study
- MN: non-certified (unlisted) inverters, which disqualify a project from the Simplified track's screens
- MN: signed MN DIA or Uniform Statewide Contract not returned within the 30-business-day window
FAQ
Which Xcel states does this page cover?
Colorado and Minnesota — Xcel's two largest distributed-solar states, each with its own process and state rules. Xcel also serves Michigan, New Mexico, North Dakota, South Dakota, Texas, and Wisconsin; those territories are not covered on this page yet.
How long does Xcel interconnection take in Colorado?
Xcel's Colorado DER portal guide sets business-day targets per stage: program review within 2 business days of fee receipt, completeness review within 10 business days, engineering review within 10 business days for systems under 10 kW DC (15 for larger), agreement countersignature within 2 business days, final document review within 3 business days, and meter installation attempted within 20 business days of the meter request. Studies, corrections, and inspection scheduling add time on top of those windows.
What is the Xcel Colorado interconnection application fee?
Xcel's Colorado portal guide lists a non-refundable engineering process fee of $100 for PV systems of 10 kW AC or less, $1,000 for systems over 10 kW up to 250 kW AC, and $2,000 for systems over 250 kW up to 2 MW AC — verify current schedule before filing. Solar*Rewards participants also pay a refundable application deposit ($250 small program, $1,500 medium program).
What is the 200% Rule in Colorado?
Xcel's Colorado portal evaluates every application against a sizing rule allowing systems up to 200% of the customer's annual load. The portal checks it automatically from the system details entered; applications that fail must upload 200% Rule support documentation, and manual evaluations are reviewed within 3 business days.
What is MN DIP?
The Minnesota Distributed Energy Resource Interconnection Process — the statewide framework the Minnesota Public Utilities Commission approved in 2019 under Minn. Stat. § 216B.1611 (docket E999/CI-16-521) for interconnecting DER of 10 MW and under. It defines three tracks: a Simplified process for certified inverter-based systems no larger than 20 kW, a Fast Track process, and a Study process, plus the standard MN DIA interconnection agreement. Xcel's Minnesota applications follow MN DIP rather than the Colorado procedures.
How long does the MN DIP Simplified process take?
The Minnesota PUC describes the Simplified process — for certified inverter-based systems no larger than 20 kW — as taking approximately 30 business days, with an application fee of up to $100. Projects that need supplemental review move into Fast Track (60 or more business days) or the Study process (90 or more business days).
What is Solar*Rewards?
Solar*Rewards is Xcel's production-based solar incentive program, offered in both Colorado and Minnesota with separate state rules and funding. Participation is elected during the interconnection application; Solar*Rewards applications carry extra requirements — an application deposit and, in Colorado, production metering and a NABCEP form at final documentation. Current incentive rates and funding availability change by state and year — verify current schedule before promising an incentive.
Change log
- Page created from public sources.
Requirements drift. Get the changes.
When this page's change log gets a new entry, we'll email you that entry. Nothing else — see the privacy note.
Sources
- Xcel Energy — Colorado DER Interconnection Application Portal Process Guide, May 2022 (PDF) (accessed 2026-08-19)
- Xcel Energy — Net Metering & Interconnection Developer Resources (accessed 2026-08-19)
- Minnesota Public Utilities Commission — Interconnection (MN DIP/DIA) (accessed 2026-08-19)
- Minnesota Public Utilities Commission — Net Metering & Compensation (accessed 2026-08-19)
- Minnesota Statutes § 216B.164 — Cogeneration and Small Power Production (accessed 2026-08-19)
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