Wattage Estimation Guide

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Remember: Don't just add up the total wattage for everything you want to power. See our section on power management to learn how to use a smaller generator to power more.

Please note: All of these wattage amounts are based on what an average appliance of the type indicated uses. This chart is intended to be used purely as a guideline. You will need to check your own appliances for actual amounts.

Domestic Applications   Approximate Starting Wattage    Approximate Running Wattage
Fridge or Freezer 1200 130 - 200
Microwave: 650 watts 1000 1000
                 800 watts 1300 1300
                 1000 watts 1500 1500
House lights as indicated on bulb (e.g 60W) as indicated on bulb (e.g 60W)
Flat Screen TV: 30 inch  120 120
Flat screen TV: 50 inch 190 190
Dishwasher 540 220
Vacuum Cleaner 800 800
Electric Fry Pan 1500 1500
Electric Range (20cm) 2100 2100
Dryer 6750 5400
Laptop 250 250
Desktop 800 800
Computer monitor 30 30
Hot water heater 4500 4500
Garage door opener 1420 720
Hair Dryer (1600 watts) 1900 1800
Campervan fridge 600 180
Slow cooker 250 250
DVD player 350 350
Portable fan 120 40

 

Industrial Applications    Approximate Starting Wattage    Approximate Running Wattage
Air compressor 1/2 hp 1600 975
                       1 hp 4500 1600
Bench grinder (20cm) 2500 1400
Circular saw (7 1/4 inch) 2300 1400
Demolition hammer 1260 1260
Drills 3/8 inch 4 amps 600 440
Drills 1/2 inch 5.4 amps 900 600
Electric chainsaw (14 inch bar) 1100 1100
Hand drill 900 600
High pressure washer (1 hp) 3600 1200
Rotary hammer 3600 1800
Table saw (10 inch) 4500 1800

 

Farming Applications    Approximate Starting Wattage   Approximate Running Wattage
Electric Fence (40km) 250 250
Milk cooler 1800 1100
Milker (vacuum pump, 2hp) 3500 2300