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  #1  
Old 02-03-2009, 06:50 PM
neanderthal neanderthal is offline
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Default wierd bubbley sound when charging agm

Im getting this weird bubbly sound while charging my brand new agm pack coming from the batteries. (zivan charger) My paktrakr is also saying "4 overcharge" scary stuff. I figure I had better charge them each individually again before hooking up the zivan again to equalize them

Is this sound normal?
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  #2  
Old 02-03-2009, 07:03 PM
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rmay635703 rmay635703 is offline
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Default Re: wierd bubbley sound when charging agm

AGMs should not get past the gassing stage as they are sealed. My fathers chinese agms were dry when he got the miles zx40 and he had to pry the covers and add liquid, something I don't recommend on an agm since once they dry adding water may not do anything for them.

Take care that you are not overcharging the batteries.
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Old 02-03-2009, 07:07 PM
TheSGC TheSGC is offline
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Default Re: wierd bubbley sound when charging agm

Is the Zivan Charger setup for AGM batteries? AGM has a very specific charging scheme and are not forgiving. I have Schumacher SC-600A Chargers for my flooded lead acid pack, and they will kill AGM because of the charging voltage being ~15-15.2 volts MAX, and AGMs shouldn't be pushed past 14.7, maybe less.

My batteries bubble, which they should, and I am due to check my water levels this week once this snow stops...
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Old 02-03-2009, 07:44 PM
neanderthal neanderthal is offline
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Default Re: wierd bubbley sound when charging agm

Well I ordered it and they company said that they set it up for agm batteries But I have no way of knowing is they accidentally did it wrong a voltmeter at the controller + and - says 176v, which should be fine for the 144v agm pack, but i dont think that you can just check that way.

Anyhow, does anyone get that sound while charging their agm packs? Is that sound a sure sign of gassing? is it normal, or an indication of a problem?
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Old 02-03-2009, 10:49 PM
Coley Coley is offline
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Default Re: wierd bubbley sound when charging agm

I don't have AGMs, but my regular charger does a fine job on my GELs with no problems.

I charge 20 amps @ 14.4volts and hear nothing from them.

Since they are sealed, I don't think they should be making any noise.
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