#11815, "RE: Inline fuse size for a 150watt inverter" In response to In response to 10
Do not use a 20amp fuse on the power wire when the Inverter has a 20amp fuse built in...this is pure stupidity. Think fuse coordination, 20amp in the unit, logic calls for a larger fuse upstream. Go with a 25amp under the hood. This way the fuse under the hood protects your cable and the fuse in the unit protects the load on the inverter. 40 or 50 amp fuse is not smart either.
IF you fuse both of them the same, what do you think will happen if you exceed the current draw? Both fuses will blow. Now you are faced with the question of why did the fuse under the hood blow as well, did your cable fault and you have a problem with loading in the inverter as well? Use common sense.
