Generators
How much power do I need?
 
To select a generator that has enough power output in watts, add the watts for the items you want to simultaneously run. Tools and appliances with induction motors may require 3 to 7 times the listed wattage when starting. All data listed is approximate-check your tool/appliance for specific wattage requirements.
Starting
Watts
Running
Watts
Household    
Dishwasher    
    Cool Dry 1400 700
    Hot Dry 1400 1450
Electric Range    
    6-inch element 0 1500
    8-inch element 0 2100
Microwave Oven    
    625 watts 800 625
Refrigerator or Freezer 2200 700
Automatic Washer 2300 1150
Clothes Dryer    
    Gas 1800 700
    Electric 1800 5750
Garage Door Opener    
    1/4-Horsepower 1100 550
    1/2 Horsepower 1400 725
Furnace Fan, gas or fuel oil    
    1/8 Horsepower 500 300
    1/6 Horsepower 750 500
    1/4 Horsepower 1000 600
    1/3 Horsepower 1400 600
Lights 0 as indicated on bulb
Radio 0 50 to 200
Well Pump    
    1/3 Horsepower 1400 750
    1/2 Horsepower 2100 1000
Sump Pump    
    1/3 Horsepower 1300 800
    1/2 Horsepower 2150 1050
Central Air Conditioner    
    10,000 BTU 2200 1500
    20,000 BTU 3300 2500
    24,000 BTU 4950 3800
    32,000 BTU 6500 5000
    40,000 BTU 7800 6000
     
Farm Equipment    
Portable Conveyor    
    1/2 Horsepower 3400 1000
Milker (Vacuum Pump)    
    2 Horsepower 10,500 2800
Farm Duty Motors (conveyors, feed augers, air compressors)    
    1/3 Horsepower 1720 720
    1-1/2 Horsepower 8200 2200
Washer 2 gal/min    
    550 PSI 4500 1400
    700 PSI 6100 1600
     
Contractor Tools    
Hand Drill    
    1/4 inch 350 350
    1/2 inch 600 600
Circular Saw    
    6-1/2 inch 500 500
    8-1/4 inch 1400 1400
Table Saw    
    10 inch 6300 1800
Band Saw    
    14 inch 2500 1100
Air Compressor    
    1/2 Horsepower 3000 1000
    1-1/2 Horsepower 8200 2200
Electric Chain Saw    
    1/2 HP, 12 in 1100 1100
    2 HP, 14 in 1100 1100
Flood Lights    
    HID 125 100
    Metal Halide 313 250
    Mercury 1000   -
    Vapor 1250 1000
Submersible Pump    
    400 gph 600 200
Centrifugal Pump    
    900 gph 900 500
High Pressure Washer    
    1/2 Horsepower 3150 950
    1 Horsepower 6100 1600
Wet & Dry Vac    
    1.7 Horsepower 900 900
     
Industrial Motors    
Split Phase    
    1/8 Horsepower 800 300
    1/2 Horsepower 3175 875
Capacitor Start-Induction Run    
    1/3 Horsepower 2020 720
    1-1/2 Horsepower 8200 2200
Capacitor Start-Capacitor Run    
    1-1/2 Horsepower 8100 2000
Fan    
    1/8 Horsepower 1000 400
    1/2 Horsepower 3500 1100