The big selling point of the agm's for me was 0 maintenance - ever, and the fact that we have a solar cathodic protection system that is 10 years old, that puts it at over 3500 (shallow) cycles. And it is still going strong. The extent of maintenance on it is cleaning the panels in the fall, once a year, that's it. It is designed with a 5% DOD during summer, in snow season the controller *should* hit the low voltage cutoff when the panels are buried. So there is the occasional deep cycle, and during overcast weather in winter it may not get into float all the time. I know of no FLA's that can go for years being ignored, and enjoy it.