Advice on replacing my IOTA battery charger for boondocking

I finally decided on and purchased the Powermax unit. My thought was that all three are basically the same as automatic three stage chargers. But with the Powermax I can flip it to manual mode and crank it up to 16v to equalize the batteries from time to time. Now I may never actually do that. But I have the option and the unit was less expensive than the PD or IOTA.

Thanks everyone who posted here and gave me your input.