The AGM one would work for mine. They want 14.8ish until the amps acceptance is down to near zip and then Float at 13.6ish. Lifeline AGMs want that lower voltage 14.4
That 14.8 happens to also be what my 6s want, so that IQ AGM model would be the one to get if going Iota. The other one that changed up Vabs to 14.5 from 14.2 is sort of useless for anything I do.
Equalize in the 15s? What good is that?--Trojan wants 16.2, which Iota must know about.
I prefer the manually adjustable voltage charger that can meet any battery specs at the turn of a knob.