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post #10 of Old 06-05-2013
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Re: Power Battery Set up for 27ft sailboat

Originally Posted by FirstCandC View Post
Ok I will ask a dumb, somewhat related question. One starting and one deep cycle battery on a Perko battery switch. Ok to start on the starting battery, and then switch to "both" on the selector switch, so that the batteries can charge via the alternator? Will this harm the anodes??
Your anodes will be fine...... your diodes will be OK too IF the switch is 'make before break' - as most are. Check this by turning on a radio or a light somewhere and switch from 1 to both to 2 and back. If the light goes out during the transitions, then don't switch batteries with the engine running. If the light stays on the whole time then you've got a 'make before break' switch.

Our current system doesn't use this type of cct, but on a previous boat we got into the habit of charging one or the other, rather than try to charge 'both' together.. esp house and starting batteries - they are likely to have very different demands. An ACR is not too expensive and does a better job.


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".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
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