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Customer-Owned Generation in IOWA

Adding a wind turbine, solar photovoltaic system, micro turbine, or fuel cell to your home or business and to the Alliant Energy distribution system is called interconnection. This process emphasizes safe installation.

If you install generation, you and your installer are responsible for following the interconnection rules of the Iowa Utilities Board (IUB) and for meeting all Alliant Energy tariff requirements.

The State of Iowa requires that owners of alternative energy production facilities such as solar photovoltaic and wind turbines notify their utility company of plans to construct, install and operate any system that will be connected to the utility’s systems (electric transmission lines, distribution lines or attached equipment).

This notice must be in written form, and must be received by the utility at least 30 days prior to start of construction. Alliant Energy customers may submit this information using the applicable Standard Interconnection Application Form available below.  Items that must be included in the notice:

  • Planned operation date of the energy facility
  • Notification of intent to construct
  • Type of energy facility being constructed

If you have any questions about advance notification, please contact Alliant Energy at 1-800-972-5325.

If you connect to our distribution system with a generation facility with a capacity of up to 20 megawatts (MW), you must comply with Iowa Administrative Rules, Chapter 15 (IUB 199.15) and Chapter 45 (199.45).

Customer responsibilities

You and your installer are responsible for coordination of design, installation, operation and maintenance of any generation system you install, and for conforming to the requirements of our tariffs and rules, and applicable governmental laws and regulations (local, state, and federal).

These requirements are designed to protect distribution system facilities; avoid electrical interference problems; ensure the safety of customers, electric provider employees and the general public; and maintain overall system reliability.

You are required by law to maintain liability insurance (equal to or greater than the amounts indicated in IAC 199.45) or to prove financial responsibility by another means agreeable to us. You are required to notify us if a material modification is made to your generation facility at any time during or after the installation process. A material modification is any modification that changes the maximum electrical output of your facility or changes the interconnection equipment, including:
  • Changing from certified to non-certified devices
  • Replacing a component with a component of different functionality or UL listing

You also are responsible for the proper installation, operation and maintenance of the specified protective devices. Finally, you shall obtain, at your expense, any and all authorizations, permits and licenses required for the construction and operation of your generating facilities.

Alliant Energy responsibilities

We are responsible for promptly carrying out the steps listed below and for meeting all required steps and timelines to process your interconnection application. We have designated the Distributed Resources Hotline as the primary contact to assist you with any questions or information you need to complete your interconnection.

1-800-972-5325
8 a.m. - 5 p.m., Monday - Friday
sellmypower@alliantenergy.com  

Alliant Energy Distributed Resources
GO-17 P.O. Box 351
Cedar Rapids, IA 52406-0351
Fax: 608-458-1199

The process
This should provide you a general overview of the interconnection process.  Each application is handled on a case-by-case basis and may include additional requirements not mentioned here.  It is important that you contact our Distributed Resources Hotline at 1-800-972-5325 as a first step to determine what you will need to complete to safety interconnect with the electrical system.

Step 1 - Notification

The State of Iowa requires that owners of alternative energy production facilities such as solar photovoltaic and wind turbines notify their utility company of plans to construct, install and operate any system that will be connected to the utility’s systems (electric transmission lines, distribution lines or attached equipment).

This notice must be in written form, and must be received by the utility at least 30 days prior to start of construction. Alliant Energy customers may submit this information using the applicable Standard Interconnection Application Form available below. Items that must be included in the notice: 

  • Planned operation date of the energy facility
  • Notification of intent to construct
  • Type of energy facility being constructed
     

If you have any questions about advance notification, please contact Alliant Energy at 1-800-972-5325.

Call our Distributed Resources Hotline at 1-800-972-5325 to inform us that you want to interconnect an electric generating system to our distribution system.  We will help you determine the appropriate application and agreements to complete depending on the facilities that you wish to install and interconnect with our system.

We respond to your request and provide all materials necessary to complete your interconnection application. All documents, forms and applications also are included in the Documents section on this page.

Step 2 - Interconnection application

Complete and submit a Standard Interconnection Request Application form (Level 1 or Level 2-4), proof of insurance (if required), other facility information, i.e. one-Line diagram, plot plan, manufacturer’s technical specifications, and label information from a nationally recognized testing laboratory,  and mail it along with your application fee to:

Alliant Energy
Distributed Generation Interconnection GO-17
PO Box 351
Cedar Rapids IA 52406-0351

Application for lab-certified inverter-based distributed resources facilities 10 kVA or less: Level 1 Standard Application Form and Distributed Resources Interconnection Agreement

Application for distributed resources facilities 10 MVA or less: Levels 2-4: Standard Interconnection Request Application Form

Step 3 - Application review

If the Standard Interconnection Request Application (Level 1 or Level 2-4) is incomplete, or the fee is not received, Alliant Energy will notify you to resubmit.

If the Distributed Generation Interconnect Request is complete, our Distributed Resources Department will notify you the application has been accepted. An Alliant Energy Distribution Engineer may contact you to explain the terms and conditions and to obtain any additional technical specifications, if required for your project.

Step 4 - Engineering review and approval

Our Distribution Engineer team will complete an engineering review to determine any changes to the distribution facilities or upgrades that are required to serve your generator.  A feasibility study and an impact study may need to be completed.

We will notify you in writing with an estimate of the costs associated with any distribution facility changes or upgrades required.  You must notify us in writing or e-mail to indicate acceptance of project terms and conditions. When additional investment in facilities is required, you state your willingness to pay for the additional facilities. If you are not willing to pay for the required facilities, the interconnection request is then cancelled.

Standard Interconnection Feasibility Study Agreement - Will be provided by Alliant Energy if required.

Standard Interconnections System Impact Study Agreement - Will be provided by Alliant Energy if required.

Standard Interconnection Facilities Study Agreement - Will be provided by Alliant Energy if required.

Step 5 - Interconnection agreement

Our Distributed Resources Hotline team will complete the following documents and forward to you for your approval and signature:
  • Applicable Standard Interconnection Agreement
  • Certificate of Completion
  • Attachment 2 of the applicable interconnection agreement (if applicable)
  • Attachment 3 which details any necessary changes to distribution facility or upgrades (if applicable)
  • Any other required documentation necessary for your project

You return the following forms to our Distributed Resources Hotline:

  • Signed applicable Standard Interconnection Agreement
  • One signed original copy of the Certificate of Completion (required within 12 months of IPL signed agreement)
  • Completed Attachment 2 (if applicable)
  • One copy of signed electric inspection form (required within 12 months of IPL signed agreement)
  • Payment for facility upgrades (if required)

Step 6 - Installation of customer generation

If required for your project, after we receive payment, we perform all work needed to upgrade our distribution system to accommodate your generating equipment.

You install your generating equipment within a timeframe that is mutually agreed upon. Please maintain ongoing communications regarding your project schedule and projected completion date with Alliant Energy personnel so that we may ensure proper interconnection with IPL facilities. 

Before metering will be installed, you must provide documentation of a successful state electrical inspection. Special metering will then be installed and if required, a witness test conducted by an Alliant Energy Distribution Engineer will be completed.

Standard Certificate of Completion to complete when installation is complete and final electric inspector approval has been obtained.

Step 7 - Completion

You will be notified that the interconnection with IPL facilities is approved. A signed original Standard Interconnection Agreement and Certificate of Completion will be sent to you for your records. Your generating equipment should not be in operation prior to receiving this permission to operate. 

For lab-certified inverter-based distributed resources facilities 10 kVA or less
Standard Certificate of Completion to complete when installation is complete and final electric inspector approval has been obtained. 

For distributed resources facilities 10 MVA or less
Levels 2-4: Standard Distributed Resources Interconnection Agreement - Will be provided by Alliant Energy if required.
Standard Certificate of Completion to complete when installation is complete and final electric inspector approval has been obtained.

Certificate of Insurance

To comply with the interconnection agreement, the interconnection customer shall maintain the required general liability insurance. Please use the following official IPL company name and address on the Certificate of Insurance:

Interstate Power and Light Company
200 1st Street SE
Cedar Rapids, IA 52401

Please remit annually to:
Alliant Energy
Distributed Resources Hotline CR GO 17th
PO Box 351
Cedar Rapids, Iowa 52406-0351

Distributed Resources documentation

Application for lab-certified inverter-based distributed resources facilities 10 kVA or less:
Level 1 Standard Application Form and Distributed Resources Interconnection Agreement 

Application for distributed resources facilities 10 MVA or less:
Levels 2-4: Standard Interconnection Request Application Form

Standard Certificate of Completion to complete when installation is complete and final electric inspector approval has been obtained.

Standard Interconnection Feasibility Study Agreement - Will be provided by Alliant Energy if required.

Standard Interconnections System Impact Study Agreement – Will be provided by Alliant Energy if required. 
 
Standard Interconnection Facilities Study Agreement – Will be provided by Alliant Energy if required.

Levels 2-4: Standard Distributed Resources Interconnection Agreement - Will be provided by Alliant Energy if required.

Rules and technical guidelines

Electric Interconnection of Distributed Resources Facilities Rule (Iowa Administrative Code) effective July 21, 2010

Iowa - Technical Guidelines and Requirements for The Interconnection of Parallel Operated Generation 

Tariff and power purchase information

Cogeneration & Small Power Production (Sheet 49, Rate Code CSPP)

Alternative Energy & Small Hydro Production (Sheet 52, Rate Code AEP)

Cogenerators, Small Power Producers, Alternate Energy Producers & Small Hydro Production (Section 16)

Additional resources 

Database of State Incentives for Renewables & Efficiency (DSIRE)

Iowa Economic Development Authority (IEDA)

Iowa Energy Center

Iowa Renewable Energy Association (i-Renew)

Iowa Solar/Small Wind Energy Trade Association (ISETA)

Rural Energy for America Program (REAP)