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How large a 110 volt generator is needed for a 40 amp 12 volt battery charger?
Wiki User
∙ 16y ago
amps*volts=watts
40 amps *12 volts= 480watts
watts/volts=amps
480watts/110volts=4.36363636amps
So you need a 110 volt generator that can produce about 5 amps as a bare minimum.
To take into account system heat loses that occur when converting power consider doubling it to be safe. (this is over kill but the advantage is that your generator is not working at full capacity at all times)
Wiki User
∙ 16y ago
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