When sizing generators, you need to consider: Power factor - many loads have poor PF and can overload a generator Loading at 70-80% of rated cont power. - Battery charging is a severe load, it's constant for long periods. Many generators cannot handle that and must be oversized a bit.
i have 2, 3KW generators, one can charge batteries and run the well pump, the other can only do 1 function, because of PF ratings
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