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09-17-2016, 08:44 AM
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#1
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Winnebago Owner
Join Date: Nov 2006
Location: Fleming Island, Fl
Posts: 124
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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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Bob, & Leah, USN Retired
2016 Itasca Suncruiser 38Q
2014 Chevy Equinox LTZ/Blue Ox Tow Bar
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09-17-2016, 08:54 AM
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#2
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Winnebago Owner
Join Date: Sep 2012
Posts: 151
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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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09-17-2016, 05:08 PM
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#3
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Winnebago Owner
Join Date: Jul 2008
Posts: 167
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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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Bill & Dar - 2012 Journey 40U
STP, Bilsteins, Ready Brute pulling a 2013 Avalanche Z71
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09-17-2016, 06:23 PM
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#4
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Winnebago Owner
Join Date: Aug 2013
Posts: 245
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x2 on our unit being set at AGM2 with NAPA batteries also.
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2012 Journey 40U (Our Incredible Journey)
2008 Dodge Dakota(TOAD) 2005 Honda Shadow in TOAD
AF-1 braking system
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09-18-2016, 08:01 PM
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#5
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Winnebago Master
Join Date: Jun 2013
Location: Full-timer/volunteer w/SOWERS
Posts: 2,740
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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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Rick & Melissa Young & Dawson (RIP), 2011 Meridian 40U, FL XCL, ISL 380HP/DEF, Al 3000 MH, 2014 Honda CR-V, SMI AF1, Blue Ox TruCenter & tow equip.,EEZTire TPMS.
Servants On Wheels Ever Ready. Best job we ever paid to do  . (full time volunteers)
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09-18-2016, 08:55 PM
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#6
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Winnebago Camper
Join Date: Jul 2010
Location: Annapolis,MD
Posts: 11
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x2 on post by jerichorick.
Lifelines are AGM1
all other agm batteries are AGM2
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09-18-2016, 09:03 PM
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#7
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Winnebago Owner
Join Date: Jun 2012
Location: SoCal
Posts: 227
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Interesting. What differs in the charging profile?
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Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
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09-19-2016, 06:49 AM
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#8
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Winnebago Master
Join Date: Jun 2013
Location: Full-timer/volunteer w/SOWERS
Posts: 2,740
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Quote:
Originally Posted by vsheetz
Interesting. What differs in the charging profile?
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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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Rick & Melissa Young & Dawson (RIP), 2011 Meridian 40U, FL XCL, ISL 380HP/DEF, Al 3000 MH, 2014 Honda CR-V, SMI AF1, Blue Ox TruCenter & tow equip.,EEZTire TPMS.
Servants On Wheels Ever Ready. Best job we ever paid to do . (full time volunteers)
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09-19-2016, 07:26 AM
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#9
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Winnebago Camper
Join Date: Sep 2014
Posts: 37
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Quote:
Originally Posted by vsheetz
Interesting. What differs in the charging profile?
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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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1998 Tioga Class C
400 amp/hrs solar, Trimetric
Retire 2020 GLW
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