Generator inlet installation for Duncan, SC. Permit pulled, inlet mounted, interlock installed, inspection passed. One day on-site. $1,197–$1,497 all-in. No extension cord spaghetti, no standby-generator price tag.
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Duncan is mostly Spartanburg County jurisdiction (occasionally City of Duncan for in-city addresses). Mix of newer builds along 290 and older farmhouses with original 100A service. Spartanburg County permits take longer than Greenville County — 5–10 days is typical — so we pull the permit same-day we quote.
Duncan permits run through Spartanburg County's EnerGov portal (civicaccess.spartanburgcounty.gov). We pull under SC Electrical License 2942, stand for the inspection, close the job out. You don't visit city hall. You don't take a day off. We handle the entire paperwork cycle.
35–45 minutes from our base — we batch Duncan + Greer runs. If you're over by near Tyger River, the 290 corridor, or the Startex area, same-week install is typically available. Older homes sometimes need a panel upgrade first — we'll flag that in the quote, no surprises.
A standby whole-home generator (Generac, Kohler, Briggs) runs $12,000–$18,000 installed. It's automatic, it's wonderful, and it's overkill if you just want the lights, fridge, WiFi, and well pump through a storm. You've already got the portable generator. The inlet + interlock unlocks its full usefulness for a tenth the cost of a standby install.
Does my generator need a 240V outlet? Yes — either a 30A (three-prong twist lock) or 50A (four-prong). If yours is 120V-only, it's not compatible with this install.
How long until I'm scheduled? Typical turnaround in Duncan is 6–14 days from quote to install.
Do I need permission from Duke Energy? No. The interlock mechanically prevents backfeeding so the install is code-compliant and doesn't require utility approval.
Why does Spartanburg County take so long? The permit portal is Google-SSO gated and reviewers work M–F 9–5. A permit filed Monday usually gets issued by end of week. We schedule your install right after the permit lands.
Are there any 50A generators common out here? Yes — larger 10–12kW portable generators are common on rural Duncan properties for well pumps + shop tools. The 50A inlet handles those cleanly.
Text us for your Duncan quote — most customers hear back within 10 minutes.
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