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Go Back   SailNet Community > On Board > Gear & Maintenance > Electrical Systems
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  #11  
Old 03-21-2012
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Re: Shore power vs battery while at slip

Thanks all, good to know. I don't have a reefer...yet, and am upgrading all my interior lighting to LED so my DC consumption will be fairly light. Unless of course, I've got "the Marley" cranked up.

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Old 03-22-2012
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Re: Shore power vs battery while at slip

Is it lithium batteries that will retain a memory of not discharged routinely? Maybe NiCad. Someone will know.

In any case, i don't think there is a standard wet, gel or agm house battery that doesn't actually prefer to be fully charged for its longest life potential.
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Old 03-22-2012
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Re: Shore power vs battery while at slip

I keep a small (easily stowable) desk lamp on board for extended time at the dock. I also have a heat lamp, with the silver surround, that I put a regular bulb in to hang over the range, during those times. For a one or two night stay, I don't use them.
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Old 03-28-2012
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Re: Shore power vs battery while at slip

Quote:
Originally Posted by hellosailor View Post
Scott, if your 12v loads are light enough so that the charger is really powering them and the batteries are just watching the show, then there's no downside to doing it that way.

OTOH if your loads are actually pulling down the batteries, that's still using up discharge cycles. In which case I'd just beef up the charger to prevent that.

How does the Bob Marley song go? "No AC, No Cry..." ? :-)
Right and a way to check would be to monitor the voltage. If you turn off the charger you'll see the voltage from the batteries alone. If when the charger is on the voltage stays above this then any power you're drawing is off the charger. If it goes below then you're pulling some current from the battery.
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