I've replaced my flooded lead acid batteries with SLA (Sealed Lead Acid Batteries). As I understand, SLA batteries and AGM batteries have pretty much the same charge rates. I have the multi stage converter which is SLA/AGM compatible for charging, my solar controller is set for SLA/AGM charging, but my 2017 Ford E350 alternator is charging the batteries at a constant 14.4 volts. Is that a little high? I don't think there's any adjustment on the engine alternator? The factory offers both flooded lead acid and agm batteries but I don't think they make any adjustments for charging the different batteries. The only adjusting I think that can be done is on the back of the solar controller.