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What Size Generator Do You Need for a Kentucky Home?

kW sizing, load calculations, and natural gas vs. propane for whole-home generator installation in Lexington and Central KY.

Lexington Electrical & HVAC TeamApril 28, 20267 min read
What Size Generator Do You Need for a Kentucky Home?

Oversizing a standby generator wastes money; undersizing means your AC or well pump won't run when you need them most. Ice storms and summer thunderstorms hit Fayette and Scott counties regularly — a real load calculation, not a brochure recommendation, is how we size every install.

Request a generator installation quote — we coordinate gas lines, transfer switches, and permits for Lexington-area homes.

Common sizes by home type

Most 2,000–3,000 sq ft Lexington-area homes need 18–26 kW for whole-home backup including central AC. Larger homes, heat pumps, and EV charging push toward 24–26 kW or load-management strategies.

  • 18–22 kW: partial-home backup — HVAC + kitchen + well pump
  • 22–26 kW: whole-home backup for typical Central Kentucky ranch or two-story
  • 30+ kW: large homes, multiple HVAC systems, or liquid-cooled units

Natural gas vs. propane in Central KY

Lexington homes on natural gas rarely run out during extended outages. Rural properties in Scott and Madison counties often use propane — plan for a 500-gallon tank to cover multi-day events.

Local examples

A Nicholasville ranch with gas heat and central AC typically lands at 22 kW. A Georgetown home with a heat pump and EV charger may need load management or a 24 kW unit. We size on your actual panel and appliance list — contact us to schedule a site visit.

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