I only have 2 wires and my batteries are hooked in series.
I would go with the #6 wire. #8 might get hot if you are pushing the trolling motor hard.
So I guess you have a NMEA 2000 Network? I have my HDS units linked with the ethernet cable. Just wondering if it is worth the money and hassle to install the NMEA 2000 Network just to have the Xi5 talking to the HDS. I get on my waypoint now and hit anchor on the Xi5. Is having the Xi5 connected a big advantage?
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