Voltage Drop From Battery To Main Breaker Panel

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Sliding contact type switches are "cleaned" by use. By exercising them, you may improve their resistance.

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Originally Posted by coupdemistral

Why Beneteau would use 6 AWG wire for that long a stretch on a most critical connection is hard to understand. I think my only workaround is to add a supplemental pair of 6 AWG wires to that same connection.

this is criminal. Bavaria use to master switch awg 000 and to busbar 0 awg 1 meter cable

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Originally Posted by edsailing

Your voltage out of the alternator is way low, should be 14.8.... .

I recommend an alternator voltage that gives you 14.3V where it needs to be. Namely, the house battery bank. My alt has remote sensing, so it varies as high as 15.1. Isolators and wire length makes marine charging a bit tricky.
A fixed alt output V is unlikely to bring joy.