Battery question

Old Mud

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JimRP31

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I would go with a deep cell which should last longer than a starting battery. Why not run the gen set for 30 minutes during the day to top off the batteries?
 

djmarchand

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If you use a deep cycle for both starting and electronics and then run it down, it may worsen the problem and not start. Starting batteries can supply a lot of current when down, deep cycle batteries cannot.

One solution is to double the capacity, either 2 Group 27s in parallel or one 8D. A better solution is to power your electronics from the house battery which should be a deep cycle and parallel with another battery if necessary.

David
 

Bill_N

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That seems like a lot of drain for just having the sounder on. And I'd think the deep cycle would be the way to go. Have you ever tried switching to your other battery mid-day?
 

Old Mud

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Bill_N

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You might want to call an electronics shop and run it by them. Seems like they could give you some insight as to whether the combined draw adds up to the drain you're experiencing. If not maybe there's a short or corroded connection somewhere that could be addressed to resolve the issue. And they might have some other suggestions as well if it does add up. Good luck with it..
 

Old Mud

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No expert here but if you are killing your battery, even a deep cycle won't give you long life, longer than a starting battery but not long.
So a larger capacity battery, that will only be drawn down 50% max is what you need. You could also look at the other side of the picture and lighten your load with LED lights, they can be inexpensive now especially if they don't say marine on them.
If your run in is long enough or your alternator large enough or you have a good regulator, or you recharge at a dock, you might eliminate the generator & it's gasoline altogether. Gasoline aboard a diesel vessel can nullify your insurance.
 

Old Mud

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