Buying the right generator can seem like a formidable task.
But in just a few easy steps you can effectively and confidently decided and choose which generator is right for you.
- Identify the tools and appliances 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 meet or exceed 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.
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.
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
|Motor Size H/P||Running Watts||Watts Req. To Start Motor|
Machines & power required to run
|Central Heating Pump||300|
|4" Angle Grinder||550|
|1/3 HP Airless Sprayer||600|
|13mm Hammer Drill||600|
|5" Angle Grinder||750|
|Lawnmower 10" Hover||1,000|
|5" Circular Saw||1,000|
|Cement Mixer *||1,320|
|Chain Saw 10"-16"||1,500|
|Hot Air Gun||1,500|
|8" floor sander||2,000|
|12" Angle Grinder||2,500|
|1 HP Pressure Washer||3,500|
|Arc Welder- 130A||3,500|
|* See Motor Starting|