Interconnection Process

Safety Is Always in the Plan to Generate Electricity

Customers must follow the interconnection process and be approved before generating electricity from their renewable energy system.

Applications and Agreements

If you have read over all the steps for the interconnection process, and you verified your equipment is approved by checking the equipment list, or you have called the interconnection hotline 313.235.4333 to verify your equipment is approved per the UL 1741 Scope 1.1a standards, then select the application below that fits your generation needs.

Start Your Application  >

Category 1 Interconnection/Net Metering Application
Complete this application for Inverter based projects tested to IEEE 1547.1 and in compliance with UL 1741 with a capacity of 20 kW or less. This application is necessary for all customers installing generation.

Category 2 Interconnection Application
This application for all projects with a capacity of more than 20 kW but less than or equal to 150 kW and for all non-inverter based or non-IEEE 1547.1 compliant projects under 20 kW. It is necessary for all customers installing generation.

Parallel Operating Agreement
This application is for projects with a capacity of 20 kW or less. It is to be executed once you have received a letter from DTE Electric stating your application and all necessary studies have been completed per DTE Electric.

View the latest generator interconnection status report.

Applications and agreements should be mailed to:
 

Interconnection Coordinator
490 SB
DTE Energy
One Energy Plaza
Detroit, MI 48226

Safety

When connecting generation resources to the system, the most important thing to DTE Electric is the safety of our employees and the safety of our customers.

Customers installing generation intended to run in parallel with our system are required to contact us and receive written authorization before operating a permanently connected generating system. Customers operating generation in parallel with the system without written permission are subject to disconnection of service.

Authorization from all other applicable regulatory bodies to ensure all local, state and federal codes and regulations are met is also required. Approval by DTE Electric does not waive the requirement for obtaining approval from other governmental bodies and approval by governmental authorities does not waive the requirement of approval by DTE Electric.

Your Responsibilities
You and your contractor or installer are responsible for coordination of the design, installation, operation and maintenance of any customer generation system you install, and for conforming with applicable governmental laws and regulations (local, state and federal) as well as the requirements of DTE Electric's tariffs and rules, which includes a requirement for an externally located, readily accessible, taggable disconnect switch.

Our Responsibilities
We are responsible for completing the steps listed in the Interconnection Process Overview in a timely manner and for meeting all required steps and time lines necessary to process your interconnection application. We will designate a primary contact to assist you with any questions or information you need to complete your Interconnection.

Equipment List

Equipment List
The Equipment List is a detailed listing of electrical equipment previously inspected by DTE Energy for use on current interconnection projects.
General Interconnection Requirements

General Interconnection Process

The following steps are used as an overview to help you through the interconnection process for Category 1. To obtain more detailed information, please view the detailed interconnection requirements below.

Starting the Interconnection Process

Customer: Let us know that you wish to interconnect an electric generating system by calling the interconnection hotline at 313.235.4333 or by email.

DTE Energy: We will provide access to a highly qualified engineer to help you through your entire process. All documents, forms and applications required to complete the process may be found on this site.

Completing the Interconnection Application

Customer: Complete and submit the standard Interconnection Application to the name and address on the form. A completed application consists of: (1) all required data fields filled in and (2) a filing fee.

Customer: At this point you may defer reviewing or review the rate option section of the web site to determine the best applicable rate option for your needs. If you qualify for and choose to select net metering as your rate, please check the boxes related to net metering on the combined interconnection and net metering application and submit the $100 combined application fee to DTE Energy.

DTE Energy: We will send a letter/email, within 10 business days, acknowledging our receipt of your application and notifying you that your application is complete or informing you if any portion of the application or interconnection data is incomplete or missing. Incomplete applications will be returned with the deficiencies clearly identified and may be resubmitted when complete. We will also send you a checklist with all the items that must be completed prior to operating in parallel. The application filing fee must be received by DTE Energy before we can move forward with the application review.

Application Review: DTE Energy Engineering Review; DTE Energy Parallel Operating Agreement; DTE Energy Customer Generation Site Verification.

Customer: Provide us with advance written notice five business days before your project will be ready for inspection, testing and approval.

DTE Energy: After we have your completed Parallel Operating Agreement and customer checklist, we will schedule for a site visit to verify that you can safely operate in parallel with our system. This may include various tasks such as an anti-islanding test, changing meters, verification of proper installation of the isolation device and verification of electrical city/township inspection.

Customer: The customer or project developer does not have to be at the site. If you choose to be at the site, please contact the appropriate DTE Energy representative you are working with on the project to schedule the visit.

 

Detailed Interconnection Requirements

Detailed Interconnection Requirements

These generator interconnection guidelines outline the process, requirements and agreements for installing or modifying generation projects connected in parallel with the DTE Energy electrical system.

Technical requirements (data, equipment, relaying, telemetry, metering) are defined below according to the size and type of generation, location of the interconnection and mode of operation (flow-back or non-flow-back).

These guidelines comply with the Michigan Public Service Commission (MPSC) rules established in MPSC Order-Case U-15787. The guidelines protect the safety of utility workers, and ensure safe operation of generators and distributed generation units in conjunction with utility company electric systems.

Read a description of DTE Energy's Electrical Distribution System. (PDF)

Proposed Guidelines:

Category 1 (PDF)
Units equal to or under 20 kW

Category 2 (PDF)
Units greater than 20 kW but less than or equal to 150 kW

Category 3 (PDF)
Units greater than 150 kW but less than or equal to 550 kW

Category 4 (PDF)
Units greater than 550 kW but less than or equal to 2 MW*

Category 5 (PDF)
Units of 2 MW or greater

Call the interconnection hotline at 313.235.4333 if you have questions regarding these guidelines.

These Generator Interconnection Guidelines are not intended for interconnections constructed to accommodate interstate transactions subject to the jurisdiction of the Federal Energy Regulatory Commission (FERC). Entities seeking to interconnect generation for the purpose of engaging in wholesale energy sales should contact the Midwest Independent System Operator, Inc. (MISO) regarding the appropriate procedures for interconnecting directly to the transmission system.

 

Technical Resources

Harness the power of knowledge. The websites and pdf files below can give you ideas and information to complete your project.

Institute of Electrical Engineers
This site will provide you with interconnection standards. Please refer to IEEE 1547.

Michigan Public Service Commission
This site will give you specific information regarding interconnection standards and net metering rules for the State of Michigan.

Section 5 - Service Equipment Manual (PDF)
This manual describes the detailed requirements regarding installation of metering equipment.

Section 7 - Wiring and Appliance Installation Manual (PDF)
The "Metering of Customer Owned Generation" section of this manual provides the general information regarding meter equipment, disconnect switch, and a simple diagram of a secondary grid-tied generator interconnection.

Midwest Independent System Operator
The Midwest ISO Generator Interconnection page is your resource to information related to generator interconnection.

ITC
This site contains information about the transmission grid.

NEC (National Electric Codes)
Please review the NEC manual before performing any electrical work.

Underwriters Laboratory
UL 1741 standard must be used to be in compliance for your customer generation equipment.

Great Lake Renewable Energy Association1
This site will provide you with a listing of contractors to install your customer generation.

1 DTE Energy has no relationship with, or control over, contractors listed on this website. This website is provided solely for the convenience of our customers. No endorsement is stated or implied.
 

 

'