Buying the right generator can seem like a formidable task.

The information we set out below is designed to be used as a guide.

By following our guide below you can  effectively and confidently calculate your requirements to help you choose which generator is right for you.

• Identify the household appliances or tools you wish to operate with your generator.
• Determine the required power for each item ( see appliance data plate i.e.: watts of appliance).
• Add the required Watts of each item that will be running simultaneously. Also, allow for motor starting of appliance * see chart
• Choose the generator that has rated Watts that meets or exceeds this total power.

Motor Starting is an important consideration when buying a generator. Keep in mind that induction-type motors, like those that run sump pumps, refrigerators and compressors, typically require 2 to 3 times their listed running watts to start.

The opposite is a chart you can use to determine how many Watts you will need to start up motors of various sizes and types.

Please note that power tools using a universal commutator do not require any additional start-up power.

The table opposite lists tools and appliances you may want to use with your generator.

With each tool or appliance is listed the approximate running watts for each.

Note:
Always consult the data plate on the tool or appliance for accurate electrical information. The outlet configuration of some units may require modification to achieve maximum rated power.

EQUIVALENT MAX kVA: Some Manufacturers give ratings in kVA by adding 25% to the power rating. This figure is for comparison with these values.

See Power Calculator

See FAQ