The 8B&S from the aux to the fuse block is rated to 100a so in case of a short, a fuse or CB should go before the wire. So total potential draw of all accessories is less than 40a before a fuse goes, and I also have the 50a circuit breaker at the aux battery positive. ![]() Plus a small voltage gauge which I intended on fusing with 5a. (max 5a (?) draw) and LED lights (can’t find manufacturer’s amp figures but comes with cigarette lighter attachment so assume much less than 10a, and will be fused with a 10a). The only accessories that will be run will be a 45L Oztrail fridge (apparent max draw of 3.75a, 15a fuse recommended from manufacturer), USB charging for phones, etc. I’ll be contacting the manufacturer of the isolator in regard to the above fuse sizes required between the cranking and auxiliary battery – given the amount of amps running through I’m thinking it’s going to need a big fuse, maybe more than 100 amps? Will also confirm suitable fuse size for the monitor. ![]()
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