60 amps times12 volts = 720 watts times 80% effic of conv. = 576 watts available for microwave...
You must have a very tiny microwave as most require at least 1000 watts input power. That might have something to do with blowing the fuse. Since the microwave has a very reactive inout, you need a goodly safety margin above the rated watts input.
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60 amp fuse on what, an inverter? 60 amps on 12 volts is only 720 watts. most microwave ovens need more power than that. running 60 amps through wire sounds scary to me. it must be very thick wire! (normal household outlets are 15 amp maximum)
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