What Size Generator

Caravan and Household generator power calculator.

In order to determine what size generator you need, you must establish which appliances will be operated from the generator and which of them will perhaps be operated at the same time.

If you would like assistance with choosing the correct model and what size generator, please feel free to call us, we are always happy to help. With over 16 years in the industry we will make sure that you get the right generator for your application.

Below we have a table with approximate power usage for appliances.

Note: Most appliances are not generally running at the same time. If in doubt please contact us.

Most electrical appliances have their current consumption on the plate which gives model, serial number etc.


Power Usage Calculator

Click on one of the links below to work out your power consumption.

Caravan / Motorhome

Household




Power Consumption Tables


Equipment Watts
Air conditioner (1hp) 2500
Angle grinder 125mm 1100
Angle grinder 230mm 2200
Belt sander 1100
Cement mixer (small) 1500
Chain saw 1600
Concrete poker 2500
Cooker 12000
Computer + screen 700
Coffee machine 1300
Dehumidifier 3000
Deep freeze 1500
Demolition breaker 2400
Dish washer 2000 to 3000
Fan heater (2 bar) 2000
Fax machine 600
Flood light TH 500
Flood light MH 1000
Flourescent tube 60
Floor sander 200mm 2000
Food mixer 500
Fridge 700 to 1000
Hair dryer 1500 to 2300
Hair straightners 300
Hammer Drill 1000
Hedge trimmer 600
Hi-Fi 300
Hot air gun 3000
Equipment Watts
Iron 1000
Iron (steam) 2200
Jig saw 600
Kettle 2000 to 2500
Lawn mower 600 to 1200
Lawn raker 500
Lightbulb (domestic) 25 to 100
800watt microwave 1600
Orbital sander 500
Planner 1000
Power drill 500 to 900
Power float 1500
Photocopier 1600
Pressure washer 3000 to 6000
Printer 400
Radiator (oil filled) 1000 to 2000
Router 1600 to 1900
Saw (chain) 1500
Saw (masonry) 4000
Saw (mitre) 1600
SAT / cable reciever 25
Strimmer 500
Television 200
Toaster 1050 to 1500
Treadmill (domestic) 2300
Tumble Dryer 2500
Vacuum cleaner 1000 to 1300
Washing machine 4000


Electric Motors Running watts Starting watts
0.25 HP motor 250 800
0.50 HP motor 500 1600
0.75 HP motor 750 2300
1.00 HP motor 1000 3000
1.50 HP motor 1500 4500
2.00 HP motor 2000 6000