Customer Support

How to Interconnect

Participation in an "own your own" solar program requires you to interconnect with our system once your solar power system is installed on site at your business. Please note that all transmission interconnection guidelines must comply with the following guidelines in addition to FERC requirements. Learn about Interconnections for Transmission.

NOTE: Before investing in a solar energy system, it is important that you contact us by emailing or calling the Business Solutions Center: 1-800-481-4700 (Monday - Friday 8:00 AM - 5:00 PM).

Interconnection Basics

Once you have installed a solar power system on site at your business, you'll need to contact us to request interconnection. We will then provide you with the Interconnection Application, that you'll submit to us, along with the application fee.

We'll review your application and either approve or deny it within 15 days. We may determine that your system requires an additional engineering study, in which case we will conduct that once given the go-ahead.

Following that, we will provide a construction estimate to you, and then you will make a final decision on whether or not to proceed in the process.

If you do decide to proceed, we'll conduct a final design review and then order the necessary equipment to begin construction.

Once construction is complete, we'll conduct final testing and give the approval to energize.

Ask Us

Looking for additional information on the interconnection process? Email us and we’ll answer your questions and help guide you through the process.

Additional Resources

Federal Energy Regulatory Commission (FERC) provides standards for small generation (less than 20 MW) interconnection for facilities within the jurisdiction of the commission. This generally applies to transmission-level interconnection. Distribution-level interconnection is usually regulated by each state's public utilities commission.

Flow Chart (GIF)

Minnesota Public Utilities Commission Rules, Chapter 7835 on Cogeneration and Small Power Production, address interconnection of Qualifying Facilities. Along with Statute 216B and House Bill HF956. The following links will bring you to the Minnesota Office of the Revisor of Statues website and will open in a new window.

Minnesota PUC Rules Chapter 7835 on Cogeneration and Small Power Production
Statute 216B-1611 - Interconnection of On-Site Distributed Generation
Statute 216B-164 - Cogeneration and Small Power Production
Statute 216B-2426 - Opportunities for Distributed Generation
Statute 216B - Public Utilities
House Bill HF956 (4th Engrossment) - Omnibus Energy Bill

Xcel Energy Tariff Section 10 provides the detailed process and technical requirements for facilities 10 MW and under.

The distributed generation interconnection process, application form, interconnection agreement, and technical requirements for interconnecting distributed generation facilities up to and including 10 MW can be found in Section 10 (Sheets 73–159.6).

The Solar*Rewards Contract can be found in Section 9 (Sheets 13-32).

Rates and Riders
See Section 5 for Standby Service Rider (Sheets 101-107), Supplemental Generation Service Rider (Sheets 108-114), Renewable Energy Standard (RES) Rider (Sheets 146-147).

See Section 6 for Standby Rates (Sheets 9-11).

See Section 9 for Net Energy Billing Service Rates (Sheet 2), Purchase and Sale Billing Service Rates (Sheet 3), Time of Day Purchase Service Rates (Sheet 4), and Solar*Rewards Contract (Sheets 14-28).

See Section 10 for Community Based Energy Development Tariff (Sheets 160-162).

Interconnection Documents
The applicable application form and interconnection agreement are included in each of the tariff groups for their set of rules.

Minnesota Electric Rate Book: Section 5 (PDF) - Standby Service, Sheet No. 101-114 (MPUC No. 2)
Minnesota Electric Rate Book: Section 6 (PDF) - General Rules, 6-13
Minnesota Electric Rate Book: Section 9 (PDF) - Cogeneration
Minnesota Electric Rate Book: Section 10 (PDF) - Distributed Resources
Net Meter Packet (PDF) - August 2015
Interconnection and Power Purchase Tariff Information Packet (PDF)

Call Center: 1-800-895-4999

Diana Naatz, Program Manager: diana.naatz@xcelenergy.com

Cory Kiemele, Distribution Engineer: cory.f.kiemele@xcelenergy.com

Gregory Gorski, Transmission Account Representative: gregory.e.gorski@xcelenergy.com

Federal Energy Regulatory Commission (FERC) provides standards for small generation (less than 20 MW) interconnection for facilities within the jurisdiction of the commission. This generally applies to transmission-level interconnection. Distribution-level interconnection is usually regulated by each state's public utilities commission.

Flow Chart (GIF)

The Colorado Public Utilities Commission has set standards for interconnection and net metering of distributed generation in the document 4 Code of Colorado Regulations (CCR 723-3). The flow charts below provide high level guidance to interconnection processes required by Rule 3667 of CCR 723-3.

Colorado State Rules (8/2014) (PDF)
Net Metering Information, Rule 3664 (Go to page 130) (PDF)
Community Solar Gardens, Rule 3665 (Go to page 132) (PDF)
Small Generation Interconnection Procedures, Rules 3667 (up to 10MW) (Go to page 138) (PDF)
Small Power Producers and Cogeneration, Rule 3900-3918 (over 10 MW) (Go to page 163) (PDF)

Call Center: 1-800-895-4999

Thomas Malone, Engineer: thomas.h.malone@xcelenergy.com

Jennifer Bass, Transmission Account Representative: jennifer.l.bass@xcelenergy.com

 

Federal Energy Regulatory Commission (FERC) provides standards for small generation (less than 20 MW) interconnection for facilities within the jurisdiction of the commission. This generally applies to transmission-level interconnection. Distribution-level interconnection is usually regulated by each state's public utilities commission.

Flow Chart (GIF)

The Michigan Public Service Commission (MPSC) has established interconnection agreements and applications for generation up to 20 kW (Category 1) and between 20 kW and 150 kW (Category 2). Updated State Rules for 150 kW to 750 kW (Category 3), 750 kW to 2 MW (Category 4) and greater than 2 MW (Category 5) are under construction. Projects above 150 kW must comply with the original Xcel Energy State Rules as stated in Case No. U-14085. This information can be found in the Projects Greater Than 150 kW section below.

The following links connect to the MPSC Customer Generation application, guidelines and agreement for Category 1 and 2 projects. The last link connects to the MPSC Case No. U-14085, this documentation is used in Projects Greater Than 150 kW section below.

Category 1 and 2 General Site (external link)
Category 1 & 2- Interconnection and Parallel Operating Agreement (Dec. 2012) (PDF)
Xcel Energy (Case No. U-14085) (external link)

Call Center: 1-800-895-4999

David Donovan, Manager - Regulatory Policy: david.d.donovan@xcelenergy.com

Federal Energy Regulatory Commission (“FERC”) provides standards for small generation (less than 20 MW) interconnection for facilities within the jurisdiction of the commission. This generally applies to transmission-level interconnection. Distribution-level interconnection is usually regulated by each state's public utilities commission.

Distributed Generation Interconnection Information

Brian G. Fleming
Xcel Energy Services – Resource Planning
600 S. Tyler, Suite 2900
Amarillo, TX 79101
Phone: 806-378-2460
Fax: 806-378-2995
Email: Brian.Fleming@xcelenergy.com

Transmission Voltage Interconnection Information

Annette Gallegos
Principal Transmission Representative
Phone: 806-640-6302
Email: Annette.Gallegos@xcelenergy.com

Federal Energy Regulatory Commission (FERC) provides standards for small generation (less than 20 MW) interconnection for facilities within the jurisdiction of the commission. This generally applies to transmission-level interconnection. Distribution-level interconnection is usually regulated by each state's public utilities commission.

The New Mexico state interconnection rules as adopted by the New Mexico Public Regulation Commission (PRC) are report in rules 568, 569, 570, and 572.

Electric Rules

Requirements applying to interconnections less than or equal to 10MW as referenced in state rule 568 are including below in the New Mexico Interconnection Manual. The manual includes interconnection process, agreements, and applications. Separated documents are also included below. All transmission interconnection guidelines must comply with the following guidelines in addition to FERC requirements.

New Mexico Interconnection Manual (July 2008) (PDF)

Flowcharts - Guidance to Interconnection Rules

Technical Requirements

The following link connects to the Xcel Energy Interconnection Manual, the Public Regulation Commission Manual can be found in the New Mexico Interconnection Documents section above.

Xcel Energy New Mexico Interconnection Manual (10/2009) (PDF)

Call Center: 1-800-895-4999

Annette Gallegos, Principal Transmission Representative: annette.gallegos@xcelenergy.com

Brian Fleming, Regulatory Consultant: brian.fleming@xcelenergy.com

Impact Studies are performed in a “cluster” method twice a year in April and October. SPS will require the party requesting interconnection to provide initial funding in the amount of $30,000 to determine if upgrades will be needed to the effected transmission system. All funding and DG generator interconnection information must be provided to SPS no less than 30 days prior to April or October. Impact Studies typically take four to six months to be completed. Multiple studies and additional funding are always a possibility. After the SPP Impact Study process is completed and provided to SPS, SPS will contact the party requesting interconnection with any transmission system upgrades required along with the distribution system upgrades. If any funding is not used for the Impact Study, it will be refunded to the party requesting interconnection.

Distributed generation in excess of the net distribution load on a substation will result in power flowing into the transmission system. Net distribution load is the sum of the traditional load and any pre-existing generation under normal operating conditions. For this situation, the substation is considered an impact to the transmission system and could require upgrades. Facilities 2 MW and less may be eligible for the fast track process in lieu of the DSIS.

SPS shall have the option to enter into the applicable Affected System study agreements and to be financially responsible for such studies, or as a condition of interconnection, to require the interconnection customer to submit a request to enter the DSIS process or other SPP study process as applicable.

Generator interconnections to the Southwestern Public Service Company (“SPS”) distribution system, not subject to Southwest Power Pool (“SPP”) Open Access Transmission Tariff (“OATT”), may still require studies to identify impacts on SPS’s transmission system. SPS will notify SPP of interconnection requests of 5 MW or more to be studied pursuant to SPP’s Affected System Generation Interconnection Impact study process (“Impact Study or Studies”). SPP and/or SPS will evaluate each interconnection request not subject to OATT requirements and will make the final determination whether the interconnection impact study will be performed by SPP. In instances where further study is warranted, such studies will be performed by SPP, at the direction of SPS. Non-jurisdictional generator interconnection customers may be required to enter into the appropriate study agreements with SPP to facilitate an Affected System Agreement. Additionally, requests for non-jurisdictional generator interconnections may be required to be coordinated with SPP in accordance with North American Electric Reliability Corporation (“NERC”) standards.

Although such studies may be performed within SPP’s Generation Interconnection Process (“GIP”) for planning purposes, the non jurisdictional generator interconnection customer will not be subject to the OATT. In such instances, the following shall apply:

1. When notified, SPP is responsible for conducting any required studies to determine if the request may impact the Transmission System.

2. Should SPP determine that the generator interconnection may impact the Transmission System, SPP shall notify SPS of such impacts and provide to SPS any system impact studies that detail such impacts.

3. As an impacted system, SPP will determine what additional studies will be required to coordinate the impacts, up to and including studying the impact in the Definitive Interconnection System Impact Studies (“DSIS”). SPS shall require as a condition of interconnection with the generation customer making request for interconnection, that all SPP required studies be completed. SPS shall have the option to enter into the applicable Affected System study agreements and to be financially responsible for such studies, or as a condition of interconnection, to require the interconnection customer to submit a request to enter the DSIS process or other SPP study process as applicable.

4. It shall remain SPS’s responsibility to complete any generator interconnection agreements in accordance with SPS’s generator interconnection procedures regarding the completion of Network Upgrades required on the Distribution System and on SPS’s Transmission System.

Federal Energy Regulatory Commission (FERC) provides standards for small generation ( less than 20 MW) interconnection for facilities within the jurisdiction of the commission. This generally applies to transmission-level interconnection. Distribution-level interconnection is usually regulated by each state's public utilities commission.

Flow Chart (GIF)

The North Dakota state interconnection rules as adopted by the North Dakota Public Service Commission are report in rules 69-09-02, 69-09-07, and 69-09-08.

Standards of Service - Electric (69-09-02) (PDF)
Small Power Production and Cogeneration (69-09-07) (PDF)
Renewable Electricity and Recycled Energy Tracking System (69-09-08) (PDF)
General ND PSC Article 69-09 (external link)

North Dakota Tariffs relating to distributed generation can be found in Section 9, Cogeneration and Small Power Production, of the North Dakota Electric Rate Book. Tariffs relating to Standby Rates can be found in Section 5-82, Standby Service Rider.

Section 9 Cogeneration and Small Power Production (2/2014) (PDF)
Section 5-82 Standby Service Rider (5/2014) (Go to page 87) (PDF)
North Dakota Service Offerings & Rates

A detailed description of the interconnection process can be found in the document, Distributed Generation Interconnection Manual, below. The manual also includes an interconnection process flow chart, interconnection application and agreement, an engineering data submittal form, and interconnection requirements.

Distributed Generation Interconnection Manual (PDF)

Call Center: 1-800-895-4999

John Wold, Program Manager: john.c.wold@xcelenergy.com

Cory Kiemele, Distribution Engineer: cory.f.kiemele@xcelenergy.com

Gregory Gorski, Transmission Account Representative: gregory.e.gorski@xcelenergy.com

Federal Energy Regulatory Commission (FERC) provides standards for small generation (less than 20 MW) interconnection for facilities within the jurisdiction of the commission. This generally applies to transmission-level interconnection. Distribution-level interconnection is usually regulated by each state's public utilities commission.

Flow Chart (GIF)

The South Dakota State interconnection rules as adopted by the South Dakota Public Utilities Commission, Administrative Rules 20:10:36.

Small Generator Facility Interconnection (external link)

South Dakota Tariffs relating to distributed generation can be found in Section 9, Cogeneration and Small Power Production, of the South Dakota Electric Rate Book. Tariffs relating to Standby Rates can be found in Section 5-68, Standby Service Rider.

Section 9 - Cogeneration and Small Power Production (11/2013) (PDF)
Section 5-68- Standby Service Rider (5/2013) (Go to page 59) (PDF)

The applicable forms and agreements are found in the state rules. Below are links for rues and forms along with the interconnection manual for SD-PUC and Xcel Energy.

Xcel Energy Distributed Generation Interconnection Manual (May 2012) (PDF)
South Dakota PUC Distributed Generator Interconnection Rules and Forms (May 2009) (Go to page 66) (PDF)

Call Center: 1-800-895-4999

John Wold, Program Manager: john.c.wold@xcelenergy.com

Cory Kiemele, Distribution Engineer: cory.f.kiemele@xcelenergy.com

Gregory Gorski, Transmission Account Representative: gregory.e.gorski@xcelenergy.com

Impact Studies are performed in a “cluster” method twice a year in April and October. SPS will require the party requesting interconnection to provide initial funding in the amount of $30,000 to determine if upgrades will be needed to the effected transmission system. All funding and DG generator interconnection information must be provided to SPS no less than 30 days prior to April or October. Impact Studies typically take four to six months to be completed. Multiple studies and additional funding are always a possibility. After the SPP Impact Study process is completed and provided to SPS, SPS will contact the party requesting interconnection with any transmission system upgrades required along with the distribution system upgrades. If any funding is not used for the Impact Study, it will be refunded to the party requesting interconnection.

Distributed generation in excess of the net distribution load on a substation will result in power flowing into the transmission system. Net distribution load is the sum of the traditional load and any pre-existing generation under normal operating conditions. For this situation, the substation is considered an impact to the transmission system and could require upgrades. Facilities 2 MW and less may be eligible for the fast track process in lieu of the DISIS.

SPS shall have the option to enter into the applicable Affected System study agreements and to be financially responsible for such studies, or as a condition of interconnection, to require the interconnection customer to submit a request to enter the DSIS process or other SPP study process as applicable.

Generator interconnections to the Southwestern Public Service Company (“SPS”) distribution system, not subject to Southwest Power Pool (“SPP”) Open Access Transmission Tariff (“OATT”), may still require studies to identify impacts on SPS’s transmission system. SPS will notify SPP of interconnection requests of 5 MW or more to be studied pursuant to SPP’s Affected System Generation Interconnection Impact study process (“Impact Study or Studies”). SPP and/or SPS will evaluate each interconnection request not subject to OATT requirements and will make the final determination whether the interconnection impact study will be performed by SPP. In instances where further study is warranted, such studies will be performed by SPP, at the direction of SPS. Non-jurisdictional generator interconnection customers may be required to enter into the appropriate study agreements with SPP to facilitate an Affected System Agreement. Additionally, requests for non-jurisdictional generator interconnections may be required to be coordinated with SPP in accordance with North American Electric Reliability Corporation (“NERC”) standards.

Although such studies may be performed within SPP’s Generation Interconnection Process (“GIP”) for planning purposes, the non jurisdictional generator interconnection customer will not be subject to the OATT. In such instances, the following shall apply:

1. When notified, SPP is responsible for conducting any required studies to determine if the request may impact the Transmission System.

2. Should SPP determine that the generator interconnection may impact the Transmission System, SPP shall notify SPS of such impacts and provide to SPS any system impact studies that detail such impacts.

3. As an impacted system, SPP will determine what additional studies will be required to coordinate the impacts, up to and including studying the impact in the Definitive Interconnection System Impact Studies (“DSIS”). SPS shall require as a condition of interconnection with the generation customer making request for interconnection, that all SPP required studies be completed. SPS shall have the option to enter into the applicable Affected System study agreements and to be financially responsible for such studies, or as a condition of interconnection, to require the interconnection customer to submit a request to enter the DSIS process or other SPP study process as applicable.

4. It shall remain SPS’s responsibility to complete any generator interconnection agreements in accordance with SPS’s generator interconnection procedures regarding the completion of Network Upgrades required on the Distribution System and on SPS’s Transmission System.

Federal Energy Regulatory Commission (FERC) provides standards for small generation (less than 20 MW) interconnection for facilities within the jurisdiction of the commission. This generally applies to transmission-level interconnection. Distribution-level interconnection is usually regulated by each state's public utilities commission.

Flow Chart (GIF)

The Wisconsin Public Service Commission has set Rules for Interconnecting Distributed Generation Facilities in the Wisconsin Administrative Code Chapter PSC 119.

Wisconsin Electric Rules

Service Rules for Electrical Utilities - PSC 113 (7/2014, No. 703) (PDF)
Rules for Interconnecting Distributed Generation Facilities - PSC 119 (2/2012, No. 674) (PDF)

Wisconsin tariffs relating to distributed generation can be found in the Wisconsin Electric Rate Book.

The Public Service Commission of Wisconsin has established interconnection agreements and applications for generation up to 20kW and between 20kW and 15MW. Guidelines have also been established by the Wisconsin Distributed Resources Collaborative. These guidelines include a detailed description of the application process for interconnection and a process flow chart.

Interconnection Application (up to 20kW) (9/2011) (external PDF)
Interconnection Application (20kW to 15MW) (9/2011) (external PDF)
Interconnection Agreement (up to 20kW) (9/2011) (external PDF)
Interconnection Agreement (20kW to 15MW) (9/2011) (external PDF)

Call Center: 1-800-895-4999

Deborah Erwin, Manager - Regulatory Policy: deborah.e.erwin@xcelenergy.com

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