The Iota 90 is not PF corrected, and costs more than a PowerMax 100
The Iota drops to 14.2 right after it gets the batteries to 14.6v ( Iota at 14.8 then) The PowerMax does the same thing only it drops to 13.6 instead of 14.2.
Neither one of them has a boost button that you can use to maintain the higher voltage 14.6 so it won't drop down. There is a version of the PowerMax out now with an external voltage adjustment knob, but that is not "automatic" if that is what the user wants. There is a 120amp sized one of those (they are called PMBC )
There is a PD 80 amper which is also not PF corrected, but does have the boost button so you can make it stay at the high voltage (but that is only 14.4) and you really only get 75 or 70 amps during Bulk unless you wire it special, difficult in an RV.
It appears you have to spend more money to get what you want, such as the 150 amp charger in those fancy inverter/chargers which can be programmed to do the charging profile you want or get the PowerMax 120a PMBC with manual adjustment
