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Old 09-17-2016, 07:44 AM   #1
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AGM Batteries/AGM Batteries

Still learning the various systems on my new Suncruiser 38Q. I was reading the Magnum Inverter info and it says you have to set the type of batteries to ensure the proper charging voltage. I've got four, 12 volt NAPA AGM's. There are two choices for AGM batteries on the inverter, AGM1 and AGM2. The literature gives various brands for the #1 selection and the #2 selection. NAPA is not one of those listed. Does anyone know what the selection should be?
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Old 09-17-2016, 07:54 AM   #2
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Call the Magnum customer service number. I do not think NAPA makes any batteries so the vendor may vary with the model number. Magnum should know how to tell.
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Old 09-17-2016, 04:08 PM   #3
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Mine is set for AGM2 - same NAPA AGM batteries. I researched it in the past, but cant find the references now..
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Old 09-17-2016, 05:23 PM   #4
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x2 on our unit being set at AGM2 with NAPA batteries also.
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Old 09-18-2016, 07:01 PM   #5
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AGM 1 is for Lifeline batteries as I recall. They require a different charging pattern from other brands. I, too researched this some time ago and found the NAPA is to be maintained on the AGM 2 setting.
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Old 09-18-2016, 07:55 PM   #6
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x2 on post by jerichorick.
Lifelines are AGM1
all other agm batteries are AGM2
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Old 09-18-2016, 08:03 PM   #7
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Interesting. What differs in the charging profile?
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Old 09-19-2016, 05:49 AM   #8
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Quote:
Originally Posted by vsheetz View Post
Interesting. What differs in the charging profile?
The easy answer is to have you do a little leg work. Go the the Lifeline website and look at their charging requirements. Then look at some other manufacture spec. Lifeline sells a true House Battery AGM. Others are more of a combination start/house battery. The builds are physically different and the charging requirements are also.

In the world of batteries a few tenths of a volt change in charging routines can mean long life or early death to that battery.

I hope this simple explanation helps.

Happy trails,
Rick Y
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Old 09-19-2016, 06:26 AM   #9
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Quote:
Originally Posted by vsheetz View Post
Interesting. What differs in the charging profile?

I found this from Vacman back in 2010. Not sure if it's totally accurate or not. Sounds about right if you ask me.

"I got a reply from MAGNUM MFG today Here is their answer to what the diff is between Agm1 And Agm2 .......Contact battery manufacturer and ask what their suggestion would be, .... do they prefer for absorb charging to be at 14.3 or 14.5......"
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