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Old 11-09-2017, 08:52 AM   #1
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Battery charging

I have a new American Coach. First time dry camping. In AGS setting it charges in bulk to 14.4 volts. As son as generator kicks off batteries immediately drop to 13.3 ish Do I have a setting wrong. Battery issue? Any thoughts
Thanks C
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Old 11-09-2017, 09:14 AM   #2
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Fully charged batteries read about 12.7 volts. Sound like you are fine if they are temporarily reading above that.
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Old 11-09-2017, 09:18 AM   #3
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So should I adjust the top charge value to 12.7. As the generator runs a lot longer
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Old 11-09-2017, 09:34 AM   #4
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You need the volts to be high ( 14 + ) to push the amps into the battery. If you set it at 12.7, you will only get a slight charge and it would start the cycle over again again. Even shutting down right after bulk charging is leaving your batteries at about 80% charged.
That's fine while camping but you want to get them to float mode before putting it away for a week or more.
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Old 11-09-2017, 09:37 AM   #5
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Thanks guys. At 14.4 it does go into float and equalize modes so I guess it’s where it needs to be new coach always gotta learn
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Old 11-09-2017, 12:43 PM   #6
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I was definitely not trying to tell you to lower the charging voltage. Often times in the winter the temperature adjusted voltage can be above 15VDC .

I just thought you were concerned that the batteries were reading 13.3 vdc when the charger was turned off. You mentioned that as soon as the generator is turned off the batteries drop to 13.3vdc. A fully charged battery that has been at rest for some time will not read above 12.8 as far as I know.

Sounds like you are figuring it all out though.
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Old 11-09-2017, 02:26 PM   #7
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If you have AGM batteries take a look at the 'equalize mode' you mentioned below. It's likely that you shouldn't be using that mode - a double-check with the battery manufacturer could save you a lot of grief ...
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Old 11-09-2017, 04:01 PM   #8
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Hi ! Welcome to IRV2! We're sure glad you joined the gang!

I'm not a battery expert so won't try to advise you. Keep her between the ditches!

Good luck, happy trails, and God bless!
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Old 11-10-2017, 08:01 AM   #9
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Thanks again everyone all great info. Will be Looking up manufacturers info on equalized
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