I'm taking the plunge and going AGM on my current conversion project. We live in an off-grid situation now, and the bus will be our full-time home. This is my first foray into renewable energy, but I have been a fan and a student for many years. That said, I have no experience with flooded deep-cycle batteries.
What I can say is that the 6 group 27 AGM batteries we are using (two more on backorder) far exceed my expectations. Only two of our four 255 watt Samsung solar panels are on line, but we're meeting our energy needs with little generator use. I was dismayed for a couple nights at how low the battery bank pulled down, but the helpful folk where we bought our MagnaSine inverter helped me locate the phantom load that was keeping the inverter excited all night. Twas a cell phone charger.
Flooded batteries were not an option in our Gillig Low Floor conversion. The batteries will be essentially be in the living space. I knew we would go AGM from the start. Of course the expense is considerable, but I believe they have come down some. Bought mine from Carquest Auto Supply. I know the owner well, and he located them from his supplier and ordered them as we needed.
I just got the remote control unit for my MS-4024 inverter. Found out two days ago that the default setting for the inverter/charger is flooded batteries. I can already tell that the bank is staying up better since I changed the programming.
Here is a shot of the temporary setup in the bus while conversion is in progress:
This was before batteries 5 and 6 arrived. Seven and 8 should be here soon. I have plenty of room should we decide to add more in the future. I'm wiring for shore power, but we plan to make little use of it. We will seldom, for instance, stay in RV parks while traveling, and we have no landline power at home base.
I recommend that anyone seriously consider AGM.