Generator Sizing Calculator
Pick the right standby or jobsite kW for any load list.
Result
Running W
4400
Peak W
7900
Recommended generator
10.0 kW
About this tool
Sum starting and running watts across motors and appliances, apply the 80% derate, and pick the smallest standard genset size. Targets r/electricians and r/HomeImprovement 'what size generator do I need?' threads.
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