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You need to know how many amps not hertz!

use ohms law. 115 volts x 10 amps (example) = 1150 watts.

volts x amps = watts

So uf tou have a 10 amp 115 fridge you need at least a 1200 watt invertor, BUT WAIT.

you need more than that to start the compressor at least 50 percent. So an 1800 to 2000 watt invertor will do for this fridge. But now you have to have enough reserve capacity in your battery. This will require more than one battery or a constant charge.

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15y ago

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