Generate your own renewable energy

Duke Energy provides through its website a summary of information that may be helpful to customers seeking to generate their own renewable energy. While Duke Energy reviews the content it publishes for accuracy and timeliness, such information is intended to provide general guidance to customers, and is not intended to serve as a substitute for the applicable state or federal statutes, rules, or regulations. Each customer is responsible for ensuring compliance with applicable statutes, rules, and regulations. By providing this information, Duke Energy has not created a legal relationship with or obligation to a potential customer. Duke Energy recommends that each customer consider obtaining legal counsel to advise on the requirements specific to their situation, because Duke Energy is unable to provide legal advice.

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Offset my bill with renewable energy

Duke Energy customers who generate electricity from their own renewable facility may be eligible to offset their retail bills through "Net Metering." Through this arrangement, you can use the electricity you generate while receiving service from Duke Energy. The rated nameplate capacity of your generating facility cannot exceed 1 megawatt.

Net metering is a special metering and billing agreement between utilities and their customers that facilitates the connection of small, renewable energy-generating systems to the power grid. Our net metering program encourages small-scale renewable energy systems, ensures that customers always have a reliable source of energy from the grid during times when their renewable generators are not producing energy, and provides substantial benefits to the electric power-generating system, the economy and the environment.

When a net metering customer’s renewable generator is producing more power than is being consumed, the electric meter runs backward, generating credits. When a net metering customer uses more power than is being produced, the meter runs forward. Net metering customers are charged only for the "net" power that they consume from the electricity service provider that has accumulated over a designated period or, if their renewable energy-generating systems make more electricity than is consumed, they may be credited for the excess electricity contributed to the grid over that same period.

It has been shown that customers with net metering systems tend to be much more aware of their energy consumption, so they usually consume less energy than the average retail customer. Net metering is also a way to increase the energy in the power grid to keep up with increases in demand during peak power-use times.

There are several factors to consider when determining whether net metering or “sell all” is best for you. Your generator's output, like your electrical consumption, will likely vary throughout the year. If your generated output is consistently greater than your consumption, a "sell-all" arrangement may be more viable than a net-metering option. While net metering should lessen your bill, it will not eliminate it entirely. It is advisable to look into the ways and times that you are using electricity and compare this to your generator's output. This effort may also help you find additional ways to conserve energy.

We recommend that customers interested in pursuing the net metering option in Indiana become familiar with:

Under Act 309, effective July 1, 2017:

Installations after December 31, 2017 and before the earlier of:
  • January 1 of the first calendar year after the calendar year in which the aggregate amount of net metering facility nameplate capacity under Duke Energy Indiana's net metering tariff equals at least 1.5% of the most recent summer peak load with at least 40% of the capacity reserved for residential customers and at least 15% of the capacity reserved for Clean Energy Resources defined by the Indiana Code section 8-1-37-4(a)(5) or
  • July 1, 2022

participate under the terms and conditions of the net metering tariff until the earlier of customer removal or replacement of the net metering facility or July 1, 2032.

Installations before January 1, 2018 participate under the terms and conditions of the net metering tariff until the earlier of customer removal or replacement of the net metering facility or July 1, 2047.

Connecting to The Grid

Finding an installer

Get connected to prescreened industry-certified home improvement professionals in your area by using our referral service.

Find It Duke

Additional online resources are available to assist you in your search for an installer in your area.

The National Renewable Energy Laboratory's PV Watts calculator estimates costs of photovoltaic systems by location. 

Interconnection overview

Interconnection is the process of obtaining permission to physically connect a generator to the electric grid, whether on the customer side of the meter, or on the utility side of the meter. Getting permission to interconnect with Duke Energy’s grid is relatively easy, but there are several important steps the customer must follow to ensure that it is done properly and safely.  

We recommend that customers become familiar with the Indiana Utility Regulatory Commission Standard Contract Rider No. 80 for Interconnection Service before starting a project. 

Contact information

Send all interconnection applications, fees and correspondence to:

Mailing Address
Duke Energy
Attention: Customer Owned Generation – Mail Code DT02W
9700 David Taylor Drive
Charlotte, NC 28262

Email: CustomerOwnedGeneration@duke-energy.com
Phone: 866.233.2290


Interconnection request application and fees

To submit an interconnection request for inverter-based projects up to 10 kilowatts in size, complete the Duke Energy Indiana Level 1 Application for Interconnection. There is no application fee for a Level 1 application.

To submit an interconnection request for non-inverter-based projects or for projects that exceed 10 kilowatts in size, complete the Duke Energy Indiana Level 2-3 Application for Interconnection.

Note that since net metering projects are not allowed to exceed 1 MW in Indiana, all applications in this area should be either Level 1 or Level 2 applications. Level 2 applications require a nonrefundable application fee of $50 plus $1.00 per kWAC. 

At the present time, the easiest way to remit the Level 2 application fee payment is to include a check with your completed Application for Interconnection form and mail it to:

Duke Energy
Attention: Customer Owned Generation – Mail Code DT02W
9700 David Taylor Drive
Charlotte, North Carolina 28262

If you have questions or prefer to remit the fee in an ACH transaction, please contact us via email at CustomerOwnedGeneration@duke-energy.com or by calling 866.233.2290.

Electrical one-line diagrams

An electrical one-line schematic diagram that depicts the project and the equipment to be installed should accompany the interconnection request. The one-line diagram should show all electrical equipment from Duke Energy’s metering location to the energy source including switches, fuses, breakers, panels, transformers, inverters, energy source, wire size, equipment ratings and transformer connections. For systems that are not inverter-based, control drawings and settings for protective relays must also be included. 

Equipment specifications

Attach documentation, such as manufacturer’s specification sheets, showing that the inverter is certified by a nationally recognized testing laboratory to meet the requirements of UL 1741. If the system is not inverter-based or is not UL 1741 compliant, additional protection will be required. Attach with the application, documentation showing the equipment specification (product literature) information for the solar panels.

Insurance certification

Per the Indiana Utility Regulatory Commission Standard Contract Rider No. 57 for Net Metering, and the 170 Indiana Administrative Code 4-4.2-8, the Customer is expected to maintain homeowners, commercial, or other insurance providing coverage in the amount of at least $100,000 for the liability of the insured against loss arising out of the use of generation equipment associated with net metering under the rider. 

Disconnect switch

The National Electric Code and Duke Energy require the installation of a manual load-break AC disconnect switch or safety switch installed between the utility system and the interconnection customer's equipment to be able to positively isolate the generation source from the grid when needed for emergency events, to perform maintenance or to assist in the restoration of service, etc.

Requirements for Disconnect Switch:
  • A clear, visible open point of disconnection
  • A clear, visible indication of switch position
  • Padlock provisions for locking the switch in the open position
  • Installed on the interconnection customer's side of the electrical interconnection with the utility's system, accessible to utility personnel
  • Located in close proximity to the utility's electrical delivery point
  • Labeled "Generator Disconnect Switch"
The switch may isolate the interconnection customer and its associated load from the utility's system or disconnect only the generator from the utility's system and shall be accessible to the utility at all times.

Inspection 

If a Duke Energy inspection and witness test is required, Customer shall contact Duke Energy within three business days of completion of the generation facility installation to schedule an inspection and witness test, which will occur within 10 business days of completion of the generation facility installation, or as otherwise agreed to by Duke Energy. The customer may not operate the generation facility (except for operational testing not to exceed two hours) until such inspection and witness test is successfully completed and all other terms and conditions in the interconnection agreement have been met. If a Duke Energy inspection and witness test is waived, operation of the generation facility may begin when installation is complete, all terms and conditions in the interconnection agreement have been met and customer has received a confirmation letter from Duke Energy indicating that the project is complete. 

Interconnection deadlines

All interconnections are subject to completion of program and interconnection process requirements, Duke Energy Indiana resource availability, holiday schedules, inclement weather and other unforeseen system emergencies. If your goal is to complete a new solar photovoltaic, wind or micro-hydro generation project by December 31st of the current year, it is recommended you submit a complete Interconnection Request to Duke Energy by October 1 for projects up to 250 kW and by July 1 for larger projects. Generation systems must receive electrical inspection approval (necessary to commission the system and set a meter) by December 1. Please note each project is evaluated on a case-by-case basis and submission of an Interconnection Request by these dates does not guarantee that the interconnection process will be complete by the end of the year. Alternately, an interconnection request received after the recommended deadline may be interconnected by the end of the year depending on resource availability; however, prioritization will be given to requests received by these dates.

Congratulations! You are ready to generate your own power.


Qualifying facility status

A generating facility proposing to sell electricity to Duke Energy Indiana under a Purchase Power Agreement on the Standard Contract Rider No. 50 - Parallel Operation - For Qualifying Facility must be a "Qualifying Facility" (QF) as defined by the Public Utility Regulatory Policies Act of 1978 (PURPA) and the Federal Energy Regulatory Commission (FERC) regulations implementing PURPA.  A qualifying facility is one that meets certain federal guidelines as defined by FERC, Title 18 CFR Part 292.101.

Depending on the project, a customer may need to fill out FERC Form 556, which is available on the FERC website

Projects smaller than 1 MW (1,000 kW) are no longer required to file a FERC Form 556 to obtain QF status as long as they meet the QF requirements. To determine if you are exempt from the requirement to file a Form 556 for your facility, based on the small size of your facility, download the Form 556 from the FERC website and complete Section 7. If the value you obtain in line 7g is less than or equal to 1,000 kW, then your facility is exempt from the Form 556 filing requirement.

Although facilities smaller than 1 MW are exempt from the requirement to file, there is no prohibition against filing the Form 556 application either for self-certification or Commission certification for these facilities.

Facilities larger than 1 MW (1,000 kW) in size as defined by maximum net power production capacity must file a FERC Form 556 either as a self-certification (or self-recertification) or as an application for Commission certification.

Additional instructions for obtaining qualifying status for your facility can also be found in this section of the FERC website.

Please send a copy of the FERC QF Certificate filing to Duke Energy Indiana with the interconnection application if you are required to file Form 556.
 

Connecting to The Grid

Finding an installer

Get connected to prescreened industry-certified home improvement professionals in your area by using our referral service.

Find It Duke

Additional online resources are available to assist you in your search for an installer in your area.

The National Renewable Energy Laboratory's PV Watts calculator estimates costs of photovoltaic systems by location. 

Interconnection overview

Interconnection is the process of obtaining permission to physically connect a generator to the electric grid, whether on the customer side of the meter, or on the utility side of the meter. Getting permission to interconnect with Duke Energy’s grid is relatively easy, but there are several important steps the customer must follow to ensure that it is done properly and safely.

Before starting a project, we recommend that customers become familiar with:

Contact information

Send all interconnection applications, fees and correspondence to:

Mailing Address
Duke Energy
Attention: Customer Owned Generation – Mail Code DT02W
9700 David Taylor Drive
Charlotte, NC 28262

Email: CustomerOwnedGeneration@duke-energy.com
Phone: 866.233.2290

Interconnection request application and fees

Pre-Request Information Request

A customer may request a Pre-Request response prior to submitting an Application to Interconnect by providing the following information in writing:  site address, grid coordinates, project size, and proposed point of interconnection.  A Pre-Request should be submitted via email to Duke Energy at customerownedgeneration@duke-energy.com. There is no fee for a Pre-Request.

Interconnection Request Application

To submit an interconnection request for inverter-based projects up to 10 kilowatts in size, complete the Duke Energy Indiana Level 1 Application for Interconnection. There is no application fee for a Level 1 application.

To submit an interconnection request for non-inverter-based projects or for projects that exceed 10 kilowatts in size complete the Duke Energy Indiana Level 2-3 Application for Interconnection. For projects less than 2 megawatts in size, the Level 2 application must be submitted with a nonrefundable application fee of $50 plus $1.00 per kWAC. Projects greater than 2 megawatts in size require a Level 3 application with a nonrefundable application fee of $100 plus $2.00 per kWAC that must be submitted with the application.

At the present time, the easiest way to remit the Level 2 or Level 3 application fee payment is to include a check with your completed Application for Interconnection form and mail it to:

Duke Energy
Attention: Customer Owned Generation – Mail Code DT02W
9700 David Taylor Drive
Charlotte, North Carolina 28262

If you have questions or prefer to remit the fee in an ACH transaction, please contact us via email at CustomerOwnedGeneration@duke-energy.com or by calling 866.233.2290.

Electrical one-line diagrams

An electrical one-line schematic diagram that depicts the project and the equipment to be installed should accompany the interconnection request. The one-line diagram should show all electrical equipment from Duke Energy’s metering location to the energy source including switches, fuses, breakers, panels, transformers, inverters, energy source, wire size, equipment ratings and transformer connections. For systems that are not inverter-based, control drawings and settings for protective relays must also be included. 

Equipment specifications

Attach documentation, such as manufacturer’s specification sheets, showing that the inverter is certified by a nationally recognized testing laboratory to meet the requirements of UL 1741. If the system is not inverter-based or is not UL 1741 compliant, additional protection will be required. Attach with the application, documentation showing the equipment specification (product literature) information for the solar panels.

Insurance certification

The customer is expected to maintain sufficient amounts of insurance coverage against risks related to the generation facilities for which there is a reasonable likelihood of occurrence, as required by the 170 Indiana Administrative Code 4-4.3-10 and Standard Contract Rider No. 80. The customer shall agree to provide Duke Energy with proof of such insurance upon request. 

Disconnect switch

The National Electric Code and Duke Energy require the installation of a manual load-break AC disconnect switch or safety switch installed between the utility system and the interconnection customer's equipment to be able to positively isolate the generation source from the grid when needed for emergency events, to perform maintenance or to assist in the restoration of service, etc.

Requirements for Disconnect Switch:
  • A clear, visible open point of disconnection
  • A clear, visible indication of switch position
  • Padlock provisions for locking the switch in the open position
  • Installed on the interconnection customer's side of the electrical interconnection with the utility's system, accessible to utility personnel
  • Located in close proximity to the utility's electrical delivery point
  • Labeled "Generator Disconnect Switch"
The switch may isolate the interconnection customer and its associated load from the utility's system or disconnect only the generator from the utility's system and shall be accessible to the utility at all times.

Inspection 

If a Duke Energy inspection and witness test is required, Customer shall contact Duke Energy within three business days of completion of the generation facility installation to schedule an inspection and witness test, which will occur within 10 business days of completion of the generation facility installation, or as otherwise agreed to by Duke Energy. The customer may not operate the generation facility (except for operational testing not to exceed two hours) until such inspection and witness test is successfully completed and all other terms and conditions in the interconnection agreement have been met. If a Duke Energy inspection and witness test is waived, operation of the generation facility may begin when installation is complete, all terms and conditions in the interconnection agreement have been met and customer has received a confirmation letter from Duke Energy indicating that the project is complete. 

Interconnection deadlines

All interconnections are subject to completion of program and interconnection process requirements, Duke Energy Indiana resource availability, holiday schedules, inclement weather and other unforeseen system emergencies. If your goal is to complete a new solar photovoltaic, wind or micro-hydro generation project by December 31st of the current year, it is recommended you submit a complete Interconnection Request to Duke Energy by October 1 for projects up to 250 kW and by July 1 for larger projects. Generation systems must receive electrical inspection approval (necessary to commission the system and set a meter) by December 1. Please note each project is evaluated on a case-by-case basis and submission of an Interconnection Request by these dates does not guarantee that the interconnection process will be complete by the end of the year. Alternately, an interconnection request received after the recommended deadline may be interconnected by the end of the year depending on resource availability; however, prioritization will be given to requests received by these dates.

Congratulations! You are ready to generate your own power.

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