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AGM battery choices
The batteries on our 2017 LD are in need of replacement. I've decided to stick with AGM since we rarely boondock. I've got Interstate and Batteries Plus near me. I'm not in a position to install them myself. Any thoughts on which AGM to get and where?

George & Jo Ann
2017 MB
George & Jo Ann
2017 MB
Re: AGM battery choices
Reply #1 –
My 2014 MB was equipped with Lifeline GPL-4CT 6 volt AGM's from the factory.  They were working just fine and even performed well with a load tester, but I finally replaced them with the same this year.  I'd hate to have them give up the ghost while we are on the road where replacing them would be difficult.  10 years on the coach batteries is a pretty good value, in my opinion.

I spent a few days Googling and calling and finally got a good price at a small shop in a nearby town. 

Warning: the price of these batteries has nearly doubled since COVID.

Harold
2014 27 MB
Towd: Either the Jeep Wrangler or trailer containing the BMW R1200GS and 2 E-bicycles
Happy wife=Happy life
Re: AGM battery choices
Reply #2 –

Decent quality lithium batteries is are now much cheaper than AGMs.
IMO, AGMs are obsolete.
LiTime 12V Deep Cycle Lithium Batteries – LiTime-US

https://www.amazon.com/Lifeline-Marine-AGM-Battery-GPL-4CT/dp/B0029XJ1U6

Larry

As an Amazon Associate Lazy Daze Owners' Group earns from qualifying purchases.
Larry
2003 23.5' Front Lounge, since new.  Previously 1983 22' Front Lounge.
Tow vehicles  2020 Jeep Wrangler Rubicon, 2001 Jeep Cherokee
Photo Collection: Lazy Daze
Re: AGM battery choices
Reply #4 –
Hi Muhammad; To get really good control of charging, a new converter can help. But the oldest (Magnatek orParallax 6345)  benefit the most. Your much newer converter may get along just fine without being changed.  The BlueSky R3000i supplied with many Lazy Dazes (stock), can be reprogrammed from the keyboard for higher voltage outputs, as long as you stay under about 500Watts of solar.  I'm running 550W, Larry is 560W.  Very rarely will you actually get that much out of the panels.  A little dirt, some clouds and non optimum pointing of the panels (most lay flat on the roof), and you won't actually be stressing the controller.  RonB
RonB (Bostick) living in San Diego
Original owner of "Bluebelle" a '99 TKB
Re: AGM battery choices
Reply #5 –
My primary concern with lithium batteries is an issue with freezing temperatures.  We often experience single digit temperatures which is a serious problem for lithium batteries.  The solution as I understand it is to use one of several methods to keep the batteries warm.  I haven’t found a solution that works for us.  So we’ve stayed with relatively inexpensive flooded batteries stored in the original location in the vented basement compartment.
 
Re: AGM battery choices
Reply #6 –
I installed Lifeline GPL-4CT AGM batteries in both my coaches when the original batteries stopped working well. At the time(s), lithium batteries were not an option. I very rarely boondocked, and neither the LD or the Class A had solar power.

The batteries were one of the few items on the coach that I never had to maintain or worry about. Once a year I'd clean the dirt off the cases. I live in an area where Fall/Winter/Spring temps go below freezing, and that was not a concern, either.

So, except for the high price, I continue to recommend the Lifelines for those folks who don't need the light weight, the fast charging, or the 12V discharge characteristics of lithium batteries.

I could install the batteries myself. If I couldn't, I'd find a mechanic or strong teenager to do it for me.

Mark H.
Former owner, 31-foot gas Class A
Former owner, 1997-8 mid-bath