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Interconnection For Larger Capacity

Interconnection Process, Electronic Application & Required Documents


Important information regarding eligibility for the North Carolina Solar Rebate Program
 

For projects greater than 20kW

Application and required documents

Prior to submitting an Interconnection Request, a customer may submit a Pre-Application Report request (PDF) on a proposed project at a specific site. A nonrefundable $300 fee is required with the submission of a Pre-Application Report request.   

The state interconnection procedures mentioned above discuss Supplemental Review as an option for interconnection projects that opt out of Fast Track or do not pass Fast Track screening. A Summary of the Criteria used in Supplemental Review is provided for information purposes.

To submit an interconnection request for projects larger than 20 kilowatts or if the project is not inverter based, use Attachment 2 of the North Carolina Interconnection Procedures. There is a nonrefundable processing fee of $250 for generating facilities larger than 20 kW up to 100 kW or $500 for generating facilities larger than 20 kW up to 2 MW required with the interconnection request.

The interconnection request must be signed by the customer requesting service. 

Electrical One-Line Diagrams

Include an electrical one-line schematic diagram depicting the project and the equipment to be installed with the interconnection request. The one-line diagram should include the project owner's name, project name, project address and model numbers and nameplate sizes of equipment, including number and nameplate electrical size information for solar panels, inverters, wind turbines, disconnect switches, etc.

The diagram should also depict the metering arrangement required whether installed on the customer side of an existing meter ("net metering/billing") or directly connected to the grid through a new delivery point requiring a separate meter. Include equipment specification (product literature) information for the solar panels and inverter(s) that provide technical information and certification for the equipment to be installed with the application.

The diagram should also depict the metering arrangement required whether installed on the customer side of an existing meter (net metering) or directly connected to the grid through a new delivery point requiring a separate meter. For drawings of recommended configurations depicting how a customer-owned generating facility should interconnect to the Duke Energy system for both Net-Metering and Purchased Power rates, please refer to these one-line diagrams. Please note that some diagrams are state-specific.

Insurance Certification

Customers are required to demonstrate liability insurance coverage maintained with an insurer authorized to do business in North Carolina. This should be submitted to Duke Energy Carolinas with the interconnection request.

The required coverage for a residential customer shall be a standard homeowner's insurance policy with liability coverage in the amount of at least $100,000 per occurrence. The required coverage for a nonresidential customer is comprehensive general liability insurance with coverage in the amount of at least $300,000 per occurrence.

Certificate of Public Convenience and Necessity

  • The State of North Carolina requires that a Certificate of Public Convenience and Necessity (CPCN) be obtained before a customer commences construction of a generating facility. See N.C.G.S. §62-110.1 for complete text.
  • Section (g) of the statute exempts facilities under 2 MW that are fueled by a renewable energy resource. However, generators that are exempt must provide a Report of Proposed Construction to the NCUC prior to construction.
  • Duke Energy requires that all generators intending to sell power to the utility receive appropriate certification or submit a Report of Proposed Construction.

CPCN Requirements

NCUC Rule R8-64 provides information required to submit a CPCN Application. Please provide a copy of your CPCN application to Duke Energy Progress at:

Mr. Lawrence B. Somers
Deputy General Counsel
Duke Energy Progress, LLC
410 Wilmington St.
Raleigh, NC 27601

All generation facilities must file a Report of Proposed Construction with the North Carolina Utilities Commission (NCUC), the governing body of regulated utilities in North Carolina. This provides the necessary notification to install a renewable generation facility in the state of North Carolina. The Report of Proposed Construction is required under NCUC Rule R8-65.

Report of Proposed Construction Requirements (generators under 2 MW fueled by renewable resources)

NCUC Rule R8-65 provides information required to submit a Report of Proposed Construction. 
To view the sample version of the Report of Proposed Construction, please click on the sample link below. In addition to the sample report, also listed below is a blank copy that can be modified. Mailing information is included within the report for your convenience. The docket number must be provided to Duke Energy Progress.

Sample Report of Proposed Construction
Blank copy of Report of Proposed Construction 

Visit the NCUC website to acquire the docket number once the document is filed with the Commission. Search Tip: Search for the docket number filing in the “All documents by date” section and select “SP-Small Power Producer” in the “For company types” section.

Contact Information for NCUC

For USPS mail:
North Carolina Utilities Commission
4325 Mail Service Center
Raleigh, NC  27699-4325

For FedEx, UPS, or other overnight service:
North Carolina Utilities Commission
Dobbs Building
430 North Salisbury Street
Raleigh, NC  27603-5918

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 assist in the restoration of service, etc. The switch must be able to provide a clear visible open point of disconnection, a clear visible indication of switch position, and have padlock provisions for locking the switch in the open position.

The switch must be installed on the interconnection customer's side of the electrical interconnection with the utility's system, accessible to utility personnel, and located in close proximity to the utility's electrical delivery point. The switch must be 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. 

See the Electrical one-line diagram section above for example diagrams showing the disconnect switch.

Interconnection Agreement and Construction

Once the interconnection application is reviewed and approved, an interconnection agreement will be prepared by Duke Energy that describes the terms and conditions of the interconnection that are specific to the project. A customer may be subject to a monthly facilities charge if additional facilities are required for interconnection (such as metering, transformers, line extensions, etc.) This document must be signed and returned to Duke Energy. Once all parties execute the agreement, a copy will be mailed back to the owner.

Inspection

Please send a copy of the local electrical inspection approval document to Duke Energy when the installation of the project is complete and has been inspected by the local electrical inspection authority. 

Submission of any remaining documents and Duke Energy’s field inspection is required before final approval can be granted.

Permission to operate

Duke Energy provides permission to operate your new system after the array is built and the meter has been set.


Deadlines

All interconnections are subject to completion of program and interconnection process requirements, Duke Energy 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 Dec. 31 of the current year, you must submit a complete interconnection request to Duke Energy no later than the dates listed below, depending on the size of the system.

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. 

Duke Energy must receive a complete interconnection request by October 1. Generation systems must receive electrical inspection approval (necessary to commission the system and set a meter) by December 1.



Important information regarding eligibility for the North Carolina Solar Rebate Program
 

For projects greater than 20kW

Application and required documents

Prior to submitting an interconnection request, a customer may submit a Pre-Application Report request (PDF) on a proposed project at a specific site. A nonrefundable $300 fee is required with the submission of a Pre-Application Report request.

The state interconnection procedures mentioned above discuss Supplemental Review as an option for interconnection projects that opt out of Fast Track or do not pass Fast Track screening. A Summary of the Criteria used in Supplemental Review is provided for information purposes. 
  

To submit an interconnection request for projects larger than 20 kilowatts or if the project is not inverter-based, use Attachment 2 of the North Carolina Interconnection Procedures. There is a nonrefundable processing fee of $250 for generating facilities larger than 20 kW up to 100 kW or $500 for generating facilities larger than 20 kW up to 2 MW required with the Interconnection Request.

The interconnection request must be signed by the customer requesting service. 

Electrical One-Line Diagrams

Include an electrical one-line schematic diagram depicting the project and the equipment to be installed with the interconnection request. The one-line diagram should include the project owner's name, project name, project address and model numbers and nameplate sizes of equipment, including number and nameplate electrical size information for solar panels, inverters, wind turbines, disconnect switches, etc.

The diagram should also depict the metering arrangement required whether installed on the customer side of an existing meter ("net metering/billing") or directly connected to the grid through a new delivery point requiring a separate meter. Include equipment specification (product literature) information for the solar panels and inverter(s) that provide technical information and certification for the equipment to be installed with the application.

The diagram should also depict the metering arrangement required whether installed on the customer side of an existing meter (net metering) or directly connected to the grid through a new delivery point requiring a separate meter. For drawings of recommended configurations depicting how a customer-owned generating facility should interconnect to the Duke Energy system for both Net-Metering and Purchased Power rates, please refer to these one-line diagrams. Please note that some diagrams are state-specific.

Insurance Certification

Customers are required to demonstrate liability insurance coverage maintained with an insurer authorized to do business in North Carolina. This should be submitted to Duke Energy Carolinas with the interconnection request.

The required coverage for a residential customer shall be a standard homeowner's insurance policy with liability coverage in the amount of at least $100,000 per occurrence. The required coverage for a nonresidential customer is comprehensive general liability insurance with coverage in the amount of at least $300,000 per occurrence.

Certificate of Public Convenience and Necessity

  • The State of North Carolina requires that a Certificate of Public Convenience and Necessity (CPCN) be obtained before a customer commences construction of a generating facility. See N.C.G.S. §62-110.1 for complete text.
  • Section (g) of the statute exempts facilities under 2 MW that are fueled by a renewable energy resource. However, generators that are exempt must provide a Report of Proposed Construction to the NCUC prior to construction.
  • Duke Energy requires that all generators intending to sell power to the utility receive appropriate certification or submit a Report of Proposed Construction.

CPCN Requirements

NCUC Rule R8-64 provides information required to submit a CPCN Application. Please provide a copy of your CPCN application to Duke Energy Progress at:

Mr. Lawrence B. Somers
Deputy General Counsel
Duke Energy Progress, LLC
410 Wilmington St.
Raleigh, NC 27601

All generation facilities must file a Report of Proposed Construction with the North Carolina Utilities Commission (NCUC), the governing body of regulated utilities in North Carolina. This provides the necessary notification to install a renewable generation facility in the state of North Carolina. The Report of Proposed Construction is required under NCUC Rule R8-65.

Report of Proposed Construction Requirements (generators under 2 MW fueled by renewable resources)

NCUC Rule R8-65 provides information required to submit a Report of Proposed Construction. 
To view the sample version of the Report of Proposed Construction, please click on the sample link below. In addition to the sample report, also listed below is a blank copy that can be modified. Mailing information is included within the report for your convenience. The docket number must be provided to Duke Energy Progress.

Sample Report of Proposed Construction
Blank copy of Report of Proposed Construction 

Visit the NCUC website to acquire the docket number once the document is filed with the Commission. Search Tip: Search for the docket number filing in the “All documents by date” section and select “SP-Small Power Producer” in the “For company types” section

Contact Information for NCUC

For USPS mail:
North Carolina Utilities Commission
4325 Mail Service Center
Raleigh, NC  27699-4325

For FedEx, UPS, or other overnight service:
North Carolina Utilities Commission
Dobbs Building
430 North Salisbury Street
Raleigh, NC  27603-5918

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 assist in the restoration of service, etc. The switch must be able to provide a clear visible open point of disconnection, a clear visible indication of switch position, and have padlock provisions for locking the switch in the open position.

The switch must be installed on the interconnection customer's side of the electrical interconnection with the utility's system, accessible to utility personnel, and located in close proximity to the utility's electrical delivery point. The switch must be 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. 

See the Electrical one-line diagram section above for example diagrams showing the disconnect switch.

Interconnection Agreement and Construction

Once the interconnection application is reviewed and approved, an interconnection agreement will be prepared by Duke Energy that describes the terms and conditions of the interconnection which are specific to the project. A customer may be subject to a monthly facilities charge if additional facilities are required for interconnection (such as metering, transformers, line extensions, etc.) This document must be signed and returned to Duke Energy. Once all parties execute the agreement, a copy will be mailed back to the owner.

Inspection

Please send a copy of the local electrical inspection approval document to Duke Energy when the installation of the project is complete and has been inspected by the local electrical inspection authority. 

Submission of any remaining documents and Duke Energy’s field inspection is required before final approval can be granted.

Permission to operate

Duke Energy provides permission to operate your new system after the array is built and the meter has been set.

Deadlines

All interconnections are subject to completion of program and interconnection process requirements, Duke Energy 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 Dec. 31 of the current year, you must submit a complete interconnection request to Duke Energy no later than the dates listed below, depending on the size of the system.

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. 

Duke Energy must receive a complete interconnection request by October 1. Generation systems must receive electrical inspection approval (necessary to commission the system and set a meter) by December 1.


For projects exceeding 20kW

Application and required documents

Prior to submitting an interconnection request, a customer may submit a Pre-Application Report request on a proposed project at a specific site. A nonrefundable $500 fee is required with the submission of a Pre-Application Report request.   

To submit an interconnection request for projects larger than 20 kilowatts or if the project is not inverter-based, use Attachment 3 of the South Carolina Interconnection Procedures. There is a nonrefundable processing fee of $250 for generating facilities larger than 20 kW up to 100 kW or $500 for generating facilities larger than 20 kW up to 2 MW required with the Interconnection Request.

The interconnection request must be signed by the customer requesting service. 

Electrical one-line diagrams

Include an electrical one-line schematic diagram depicting the project and the equipment to be installed with the interconnection request. The one-line diagram should include the project owner's name, project name, project address and model numbers and nameplate sizes of equipment, including number and nameplate electrical size information for solar panels, inverters, wind turbines, disconnect switches, etc.

The diagram should also depict the metering arrangement required whether installed on the customer side of an existing meter ("net metering/billing") or directly connected to the grid through a new delivery point requiring a separate meter. Include equipment specification (product literature) information for the solar panels and inverter(s) that provide technical information and certification for the equipment to be installed with the application.

The diagram should also depict the metering arrangement required whether installed on the customer side of an existing meter (net metering) or directly connected to the grid through a new delivery point requiring a separate meter. For drawings of recommended configurations depicting how a customer-owned generating facility should interconnect to the Duke Energy system for both Net-Metering and Purchased Power rates, please refer to these one-line diagrams. Please note that some diagrams are state-specific.

Insurance certification

Customers are required to demonstrate liability insurance coverage maintained with an insurer authorized to do business in South Carolina. This should be submitted to Duke Energy with the Application to Interconnect.

Residential customers are required to demonstrate liability insurance coverage maintained with an insurer authorized to do business in South Carolina. The required coverage shall be a standard homeowner's insurance policy with liability coverage in the amount of at least $100,000 per occurrence.

Nonresidential customers no larger than 250 kW are required to demonstrate liability insurance coverage maintained with an insurer authorized to do business in South Carolina. The required coverage shall be comprehensive general liability insurance with coverage in the amount of at least $300,000 per occurrence.

Nonresidential customers larger than 250 kW are required to demonstrate liability insurance coverage maintained with an insurer authorized to do business in South Carolina. The required coverage shall be comprehensive general liability insurance with coverage in the amount of at least $1,000,000 per occurrence.

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 assist in the restoration of service, etc. The switch must be able to provide a clear visible open point of disconnection, a clear visible indication of switch position, and have padlock provisions for locking the switch in the open position.

The switch must be installed on the interconnection customer's side of the electrical interconnection with the utility's system, accessible to utility personnel, and located in close proximity to the utility's electrical delivery point. The switch must be 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.

See the Electrical One-line Diagram section above for example diagrams showing the disconnect switch.

Interconnection agreement and construction

Once the interconnection application is reviewed and approved, an interconnection agreement will be prepared by Duke Energy that describes the terms and conditions of the interconnection which are specific to the project. A customer may be subject to a monthly facilities charge if additional facilities are required for interconnection (such as metering, transformers, line extensions, etc.). This document must be signed and returned to Duke Energy. Once all parties execute the agreement, a copy will be mailed back to the owner.

Inspection

Please send a copy of the local electrical inspection approval document to Duke Energy when the installation of the project is complete and has been inspected by the local electrical inspection authority.

Submission of any remaining documents and Duke Energy’s field inspection is required before final approval can be granted.

Permission to operate

Duke Energy provides permission to operate your new system after the array is built and the meter has been set.

Deadlines

All interconnections are subject to completion of program and interconnection process requirements, Duke Energy 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 Dec. 31 of the current year, you must submit a complete interconnection request to Duke Energy no later than the dates listed below, depending on the size of the system.

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. 

Duke Energy recommends allowing a minimum of six months to interconnect large generation projects. However, each project is evaluated on a case-by-case basis. 

For projects exceeding 20kW

Application and required documents

Prior to submitting an interconnection request, a customer may submit a Pre-Application Report request on a proposed project at a specific site. A nonrefundable $500 fee is required with the submission of a Pre-Application Report request.   

To submit an interconnection request for projects larger than 20 kilowatts or if the project is not inverter-based, use Attachment 3 of the South Carolina Interconnection Procedures. There is a nonrefundable processing fee of $250 for generating facilities larger than 20 kW up to 100 kW or $500 for generating facilities larger than 20 kW up to 2 MW required with the interconnection request.

The interconnection request must be signed by the customer requesting service. 

Electrical one-line diagrams

Include an electrical one-line schematic diagram depicting the project and the equipment to be installed with the interconnection request. The one-line diagram should include the project owner's name, project name, project address and model numbers and nameplate sizes of equipment, including number and nameplate electrical size information for solar panels, inverters, wind turbines, disconnect switches, etc.

The diagram should also depict the metering arrangement required whether installed on the customer side of an existing meter ("net metering/billing") or directly connected to the grid through a new delivery point requiring a separate meter. Include equipment specification (product literature) information for the solar panels and inverter(s) that provide technical information and certification for the equipment to be installed with the application.

The diagram should also depict the metering arrangement required whether installed on the customer side of an existing meter (net metering) or directly connected to the grid through a new delivery point requiring a separate meter. For drawings of recommended configurations depicting how a customer-owned generating facility should interconnect to the Duke Energy system for both Net-Metering and Purchased Power rates, please refer to these one line diagrams. Please note that some diagrams are state-specific.

Insurance certification

Customers are required to demonstrate liability insurance coverage maintained with an insurer authorized to do business in South Carolina. This should be submitted to Duke Energy with the Application to Interconnect.

Residential customers are required to demonstrate liability insurance coverage maintained with an insurer authorized to do business in South Carolina. The required coverage shall be a standard homeowner's insurance policy with liability coverage in the amount of at least $100,000 per occurrence.

Nonresidential customers no larger than 250 kW are required to demonstrate liability insurance coverage maintained with an insurer authorized to do business in South Carolina. The required coverage shall be comprehensive general liability insurance with coverage in the amount of at least $300,000 per occurrence.

Nonresidential customers larger than 250 kW are required to demonstrate liability insurance coverage maintained with an insurer authorized to do business in South Carolina. The required coverage shall be comprehensive general liability insurance with coverage in the amount of at least $1,000,000 per occurrence.

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 assist in the restoration of service, etc. The switch must be able to provide a clear visible open point of disconnection, a clear visible indication of switch position, and have padlock provisions for locking the switch in the open position.

The switch must be installed on the interconnection customer's side of the electrical interconnection with the utility's system, accessible to utility personnel, and located in close proximity to the utility's electrical delivery point. The switch must be labeled "Generator Disconnect Switch." The switch may isolate the interconnection customer and its associated load from the utility's system or disconnect only the fenerator from the utility's system and shall be accessible to the utility at all times.

See the Electrical One-line Diagram section above for example diagrams showing the disconnect switch.

Interconnection agreement and construction

Once the interconnection application is reviewed and approved, an interconnection agreement will be prepared by Duke Energy that describes the terms and conditions of the interconnection that are specific to the project. A customer may be subject to a monthly facilities charge if additional facilities are required for interconnection (such as metering, transformers, line extensions, etc.). This document must be signed and returned to Duke Energy. Once all parties execute the agreement, a copy will be mailed back to the owner.

Inspection

Please send a copy of the local electrical inspection approval document to Duke Energy when the installation of the project is complete and has been inspected by the local electrical inspection authority.

Submission of any remaining documents and Duke Energy’s field inspection is required before final approval can be granted.

Permission to operate

Duke Energy provides permission to operate your new system after the array is built and the meter has been set.

Deadlines

All interconnections are subject to completion of program and interconnection process requirements, Duke Energy 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 Dec. 31 of the current year, you must submit a complete interconnection request to Duke Energy no later than the dates listed below, depending on the size of the system.

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. 

Duke Energy recommends allowing a minimum of six months to interconnect large generation projects. However, each project is evaluated on a case-by-case basis.