Sizing decision tree
Pick circuits by priority, estimate running watts, then talk kW classes with an installer.
Educational guide · Not an installer
Figure out what size standby generator you actually need
A plain-language load decision tree, all-in cost factors, and quote red flags — with general U.S. notes and North Carolina–friendly permit reminders.
All-in cost factors
Unit price is only part of the bill: pad, gas line, transfer switch, permits, and maintenance.
Red flags
Cash-only shortcuts, skipped permits, and vague transfer-switch plans are expensive later.
Permit notes (general U.S. + NC-friendly)
Most jurisdictions treat a permanently installed standby generator as a permitted electrical (and often gas/mechanical) project. Expect inspections for the transfer switch, grounding, fuel piping, and clearances.
North Carolina tip: Confirm county/city building and electrical permit requirements before installation. HOA covenants, setback rules, and utility notification can apply even when the state code path is clear. Ask your contractor which AHJ (authority having jurisdiction) will inspect.
This is general consumer education, not legal or code advice. Local amendments win.