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Are you interested in developing a solar project and interconnnecting it with Dominion Energy's system? Use the South Carolina Public Service Commission-approved processes below. Note that these processes pertain only to interconnection. For information on how to sell power back to Dominion Energy, please visit Solar For Your Business.

Fast Track Process

Eligibility is based upon the generator type, size, voltage of the line and the location of the Point of Interconnection. Generators greater than 2 MW or connecting to lines greater or equal to 25 kV are ineligible.

Study Process

This process is used for all systems that are ineligible or fail the Inverter Process or Fast-Track Process.

Application Fees

Generator Capacity Process Application Fee
> 20 kW to 100 kW Fast Track $250
> 100 kW to 2 MW Fast Track $500
> 2 MW Study $10,000 deposit + $1 per kWac of generator capacity


Steps for Interconnecting

  1. Review Procedures & Guidelines

  2. Complete Application Forms

    • Pre-Application Request (Optional)

      Complete this optional form to receive valuable information on the Dominion Energy system at your desired Point of Interconnection. This helps you preliminarily evaluate your site without incurring the expense of preparing a full Interconnection Request.

    • Interconnection Request Application

      Provide Dominion Energy information about the generating facility you would like to interconnect.

  3. Send Completed Applications and Fees

    You may e-mail signed documents as PDF files or mail them with application fee to the appropriate address below:

    For Systems > 20 kW
    Dominion Energy Transmission Support Team
    220 Operation Way (Mail Code J-36)
    Cayce, SC 29033

  4. Receive Queue Number from Dominion Energy

    The queue number is used to determine the priority for interconnection service and the cost responsibility for the upgrades necessary to accommodate the interconnection. A lower queue number will be studied prior to a higher one.

  5. Receive Approval of Application

    Receive approval from Dominion Energy to interconnect your system and execute an Interconnection Agreement.

  6. Inspection and Final Approval

    After testing, and upon successful inspection by Dominion Energy, receive final approval from Dominion Energy to energize your system.

  7. Use System

    You may now begin commercial operation.

Questions & Answers

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The SCGIP is for Qualifying Facilities that intend to sell the full output to Dominion Energy. All other generating facilities connecting to the Dominion Energy system should apply under Dominion Energy’s Open Access Transmission Tariff utilizing the SGIP or the LGIP. Refer to Dominion Energy’s OASIS website.


Pre-Application Requests are optional.  However, a Pre-Application Report can provide valuable information on the Dominion Energy system that can be utilized to evaluate interconnection sites without incurring the expense of preparing a full Interconnection Request.

Pre-Application Reports provide only a snap-shot of the requested portion of the Dominion Energy system at the time of the report. A Pre-Application Request does not establish a queue position in the Dominion Energy Interconnection Queue. 

If your project fails the Fast Track Process, it can be evaluation under a Supplemental Review Process or the Study Process, whichever is applicable to your specific project.

Fast Track Application Fees are intended to offset Dominion Energy’s cost of evaluating interconnection requests. Application Fees are not refundable.

Study Deposits are intended to offset Dominion Energy’s cost of evaluating and interconnecting generation projects. Dominion Energy will track the costs associated with an individual project.  After the project’s completion, Dominion Energy will reconcile the cost to the deposit(s) provided. Dominion Energy will refund any over-collected amounts.  If the costs exceed the deposit(s), the Interconnecting Customer will be invoiced for the remaining balance.