Topic: Upgrading from Lead Acid to AGM (Read 1793 times) previous topic - next topic

Hi Everyone, I'm starting to think about what type batteries to use when I replace them in our 2019 Wonder MB. I'm leaning towards switching to AGM. I believe there's some adjustments I have to make to the charging system and solar controller (400 watts). Has anyone done this upgrade or have any knowledge of the process? Any input will be greatly appreciated!

The GoPower solar controller, and assume you have a Xantrex inverter, both need to be changed to AGM.  Instructions are in the manuals, fairly simple procedure.
If you have a Sterling dc to dc charger that also should be changed, although some people say it is not critical.  To make changes, this one is a real pain.  Need good access and a manual.
Good luck.
Ps, I am surprised you don’t have AGMs now.

Thanks for the info Harry! We bought our Wonder off the showroom floor so we didn't have the option of AGM batteries. The dealer ordered it with all the other bells & whistles, not sure why they didn't upgrade the batteries. We have a Magnum inverter along with the GoPower solar, not seeing a Sterling charger, think its handled by the Magnum. The switch to AGM looks straightforward, just have to decide on batteries and whether I want the additional 30-40 lbs of weight. Curious what brand AGM battery LTV uses?

In my 2021 W24RTB the batteries are a pair of these. 220 Ah 6v AGM wired in series.

I just changed out everything in our new 2021 and added 315ah Lithium battery, added solar and put new Xantrex 3000w inverter in. I would consider myself a DIY enthusiast and learned a lot. I would love to talk with you about your question. If you want send me a text first to 651.248.1941 and we can arrange a time. I really had fun doing this change over/upgrade.

My wife and I have just completed our first year of owning our low mileage (Still under 20K miles) 2011 LTV Unity MB. We have definitely found the FLA battery bank that it came with, including 2 new batteries installed at time of purchase, to be insuffiecient to our needs. They already need replacing. Probably due in part to leaving the Coach plugged in pretty much all the time when home. I have full hookups on my RV pad.
I have just started research into a battery upgrade. I would love to go Lithium ion but there is a lot more that needs to be upgraded on our particular unit to make that work. So I am looking at AGM.
Even this upgrade, as I understand needs to or should have a converter/charger upgrade done to the Parallax 7300 series to provide multi stage charging. Only about a $250 DIY investment. Plus another $375 to $400 investment for a 200ah AGM battery. Throw in a better battery monitor. and it's still way less than a Lithium upgrade. 

Question is; What else needs to be upgraded, if anything, for proper alternator charging of AGM's ?