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30-60 amp battery charger

Old 12-24-2002, 01:08 PM
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Default 30-60 amp battery charger

I have a 30 amp continuous, 60 amp intermittant "automatic" (guest i think) charger on my 1989 28 Grady with four batteries. It's probably original equipment. The manual doesn't have much info except for installation. How long is too long to leave this charger on without burning the batteries up? [img]/infopop/emoticons/icon_confused.gif[/img]

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Old 12-24-2002, 02:01 PM
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Default 30-60 amp battery charger

If it is automatic, it will sense when the batteries are fully charged and cut back to trickle charge.

There is no harm in leaving it on all winter.

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Old 12-24-2002, 09:09 PM
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Default 30-60 amp battery charger

30 Amp sounds awfully potent Danny... Will that do all four batteries at once? I'm a tad electrically declined but, it sounds like quite a kick. I s'pose if it's automatic, no probs...I was under the impression a battery liked a slower rate of charge, more like 5 to 8 amps in trickle mode kinda thing. Hope one of the experts chimes in with the skinny.
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Old 12-25-2002, 04:01 AM
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Default 30-60 amp battery charger

I wondered the same thing, Seaswan, but assumed that he is charging the 4 batteries in parallel, which would provide an average of bit over 7Amps for each battery.

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Old 12-25-2002, 05:34 AM
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Default 30-60 amp battery charger

Danny,

You need to be calling the manufacturer of the charger and giving them the model number and asking them. I say that because of the age of the charger. Back in '89 every charger on the market was not a 'Smart' charger. If you had a smart charger, one that sensed the state of charge of the batterys and adjusted its output accordingly, you could leave it plugged in virtually all the time so long as you checked your electrolite leveles periodically. Unfortunately most of the chargers made back then didn't drop down to very low amperages and consequently they would cause excessive electrolite loss if left on for extended periods. See if you can Find Sue D. of Guest (assuming that is who made your charger) and see what she has to say.

Thom

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Old 01-01-2003, 06:14 PM
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Default 30-60 amp battery charger

Thom,
This was Sue's reply below but I still don't have a lot of confidence in the charger. I just plan on using it for an hour or two at a time during the winter when I go down to piddle on the boat. I've had the boat for two years and replaced all four batteries while using the battery charger the first year. Could have been coincidence??? Thanks again for the input guys. This is the best boating board I've found but I sure hope Wiley does something about this new color scheme. Making me feel kind of whoozy

Danny,

Yes, you can leave the charger plugged in and unattended. The charger is automatic in that it will charge up your batteries and then discontinue the DC output once they are fully charged. The charger will turn itself back on whenever a load is applied to the batteries or if they drop 10% of their voltage.

Some reasons for batteries going bad are age, a constant draw on the batteries while charging, evaporation of electrolyte or a bad charger. Hope this helps.

Regards,
Sue D.

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