Before your solar system can send power to the grid, Duke Energy has to approve the connection. Your installer submits an interconnection application on your behalf. Duke Energy reviews it, and once approved, a utility technician visits to swap in a bidirectional meter that can measure power flowing in both directions.
Interconnection is part of why solar timelines run eight to fourteen weeks from contract to a live system. The physical installation takes one to three days. Permitting, interconnection approval, and the final inspection account for the rest.
You can’t legally export power to the grid without interconnection approval. Some installers will energize the panels for self-consumption only before the approval comes through. Ask your installer what their practice is and what the timeline looks like in your area.
When you’re getting quotes
Interconnection should be included in your installer’s scope of work, not an add-on. Ask directly: does your quote include handling the Duke Energy interconnection application? A contractor who regularly installs solar in NC will treat this as routine. The answer also tells you something about how organized they are with the permit-and-approval timeline.
Common questions
- How long does solar interconnection take with Duke Energy in North Carolina?
- Duke Energy interconnection approval typically adds four to eight weeks to a solar project timeline after the physical installation is complete. Total project timelines in Raleigh and Charlotte commonly run eight to fourteen weeks from contract signing. Delays often come from permit backlogs at the city or county level before the Duke application is even submitted.
- Who handles the Duke Energy interconnection application?
- Your solar installer handles it. Submitting the interconnection application should be part of their standard scope of work, not an extra charge. Installers who regularly work in North Carolina treat it as routine. If a contractor asks you to handle the application yourself, that's unusual and worth asking about.
- Can I use my solar panels before interconnection approval?
- Not legally for grid export. Some installers will energize the system for self-consumption only while awaiting approval, meaning your panels offset your home's load but don't send power to the grid. Once Duke Energy approves interconnection and installs the bidirectional meter, the system goes fully live.