Generator Sizing Chart
Find the right size generator for your home
Quick Sizing Guide
| Generator Size | Best For | What It Powers | Installed Price* |
|---|---|---|---|
| 10-14 kW | Small homes under 1,500 sq ft | Essential circuits: lights, fridge, sump pump, some outlets | $8,000-$10,000 |
| 16-20 kW | Medium homes 1,500-2,500 sq ft | Most of home including small central AC (up to 3 tons) | $9,000-$12,000 |
| 22-26 kW | Large homes 2,500+ sq ft | Whole home coverage including large central AC (4-5 tons) | $11,000-$15,000 |
*Dealer cost pricing. Actual price depends on installation requirements.
Factors That Affect Generator Size
🏠 Home Size
Larger homes need more power. Square footage is a starting point, but electrical load matters more.
❄️ Central AC Size
AC is the biggest power draw. A 3-ton unit needs ~3,500W running, 7,000W starting.
💧 Well Pump
If you have a well, add 1,000-2,000W for the pump. Essential for rural properties.
🏥 Medical Equipment
CPAP, oxygen concentrators, refrigerated medications all require reliable backup power.
🔌 Electric Appliances
Electric water heaters, ranges, and dryers add significant load. Consider your must-haves.
🚗 EV Charger
Level 2 chargers draw 7,200-9,600W. Factor this in if you need to charge during outages.
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