The MC43 documentation states to use a single 40A external fuse to protect the module. Is it sufficient to run two single 20A fuses, one on each +BAT connection?
The +BAT is tied inside the module, so if one of the wires were to break or be damaged you would pull all the current to handle the outputs through a single 20 A fuse. We prefer the 40 A fuse close to the module and then a Y splice to the +BAT pins.
Ok, thank you.
Can I assume this is also true for the XC43?
I'd say that two separate 20 A fuses could be preferable. 40 A is the maximum specified for the MC4x, but one other aspect to consider is the wire gauge.
As Ken points out, if you do split it up in two 20 A fused wires, trobleshooting a cut wire could be tricky, as that would blow the fuse on the undamaged wire.
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