Originally Posted by larmistead
I'm upgrading a Beneteau
331 electrical system
per the generally "accepted wisdom" here. I now have a house bank with two 4Ds in parallel and a separate start battery. I've installed a battery monitor
and a Xantrix echo charger
. I've run a new cable from the alternator to the start battery bank. All seems to be well. For now, I'm retaining the stock alternator, an Arco 86050 50 amp. It's hard to see the back of it but it appears to be a "one wire" unit with connections to the starter switch panel, tach and battery. I'm thinking the regulator's sense wire is internal and inaccessible to connect it to the house bank. Can someone tell me if this is true?
Can I get by with this until I get the gumption (and $) to upgrade the alternator. I read that there are problems doing this with the Westerbeke
Yes , its "internally or machine sensed", thats the most common sense system.
Given the system you have , just transfer the alternator charge supply to the domestic bank, and let teh echo charge take care of the starter battery.
Battery sensing is only a "nice to have", unless you have diode splitters or whatnot in the circuit , which you dont have.
Make sure your batteries share a common negative, The field excite , which is fed via the start switch , can still come from the starter battery, its not a big deal.