I did upgrade to AGM's about a year ago (and love them). I think the converter will charge fine (AGM's are very simular to Lead Acid) BUT since many of the entry level RV's have cheap converters in them I upgraded a few months ago to a Progressive Industry converter for peice of mind.
Best thing to do (IMO) is install AGM's and make sure you check with a mutli meter what exactly what your converter is doing several time during the day then the next day. If it never seems to go into a float mode you can upgrade your converter (not very hard to install).
Plus since AGM's discharge much slower - I dont even plug it in while in storage. I would either drive my RV (with Genny on) to charge it once a month for 45 min or longer ....or plug it in for 24 hours or so. But they were never low so I could have went 3 + mo with no problem (try that Lead Acid - lol).
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2017 Axis / 25.4: Big Foot Levelers, Aims 1200 Watt inverter, Ceramic Window Tint, Full River AGM 6V batteries, Front Hellwig Sway bar / Rear Track Arm, Safe T Plus Steering Stabilizer, PD 4655 converter, Hard Wired Surge Guard, WEboost + WiFi Ranger, LED Headlights/Driving lights, TPMS, Surge tank, Tornado flush, Viair Compressor
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