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Go Back   SailNet Community > On Board > Gear & Maintenance > Electrical Systems
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  #1  
Old 09-21-2011
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Cheapest way to "maintain" batteries

two cheap group 27 bats..... one bank. 220amp hrs. Long winter. What would you use to keep them pumped up?
(looking for an afordable battery maintainer)
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Old 09-21-2011
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At home?

In a marina and untended?

On a mooring?

Need input!
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Old 09-21-2011
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oops..... sorry, not enough info.

The answere to your question is: At home. ..... AC is available.
Also, I'm located at a very high latitude, so solar is not a good option.

I have a Guest 2607, but in the fine print it says 72 amp hr Max bank size.
I've wondered though if it might be ok as a maintainer...... make sure they are toped off before putting the 2607 on.
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As a maintainer it should work fine at 3 amps per output.
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Why should altitude make a difference with solar?
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Old 09-21-2011
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not altitude, .... latitude ;-)
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Sorry, I guess I read it wrong - can't tell as it has been edited.
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Old 09-21-2011
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Before we put our 2 group 27 batteries to bed for the winter we fill the cells with distilled water as needed. Then they get hooked up to a multi stage charger and they spend the winter being trickle charged. Check wet cells again before re-commissioning.
We did have to get new batteries this year but the oldest was 6 or 7 years old. I'd prefer if they would last 10 years but I gather that anything over 5 years is considered decent longevity for wet cells.
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Old 09-23-2011
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So I put the Guest 2607 on the batteries after charging them up.

After one hour, my little volt meter showed 13.4.
After twentyfour hours it's reading 13.8 Does that seem high?

I can't hear or see "boiling"

The 2607 seems to be doing OK ... though it does feel very slightly warm.

Sorry, I'm a worrier.
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Chargers will get warm normally.

According to the manual - shown below - that is normal and as the battery becomes fully charged the voltage (and current) will drop.

It is not likely they will boil as the current is only 3 amps max reducing to .1 amps finally.
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