Matt, There is a general idea that the 1-2-Both switch can lead to operator error (switching to off, when the alternator is running, which quite likely would fry the alternator diodes). Therefore the better setup is to have the house battery bank tied directly to the alternator and have the starting battery charged by an ACR or an Echo-Charger. This provides the protection from user error and gives the priority to charging the house bank that supposedly is the one that gets discharged deeper (hence it needs more charge). The starting battery is much smaller, and needs much less charge. This also provides you with a peace of mind - you should never discharge the starting battery by using any on-board systems.
The second point is that you are much better off having a single large house bank (vs. a split one). A larger (combined) bank should last longer (you would less likely discharge it below the safe level) and would provide a higher real capacity (Peukert is your enemy here). Keep in mind that a larger bank may need a larger alternator or bigger charger, but you would need them regardless. Marek 1994 C270 “Legato” Ottawa, ON From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Matthew L. Wolford via CnC-List Sent: Saturday, April 08, 2017 14:46 To: cnc-list@cnc-list.com Cc: Matthew L. Wolford <wolf...@erie.net> Subject: Re: Stus-List Transducer help; now electrical question for Fred A friend of mine recently expressed the view that the house batteries should simply be tied in without the selector switch so that they are both being used at the same time. What say you? Matt
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