https://www.solar-electric.com/lib/wind-sun/Crown-CR-260-specs.pdfLooks like they want Vabs to be 14.22 (2.37) and fully discharged SG is 1.124.
But then they say do a "finish" near the end of the absorption stage to 2.65 = 15.9 So you will be twiddling the pot during a recharge, although it will max at 15.5.
Good luck with that for the average RVer and his typical converter :(
Looks like PowerMax is right to have the adjustable voltage feature on all their new converters coming out (LK model) that goes to 15.5, although even that is too low for some battery specs it seems.
I suppose the other converter brands will have to respond to all these higher battery voltages one of these days. I can't see how the fixed three-stage converter that is no good for anything can last in this situation. Going to make it hard for the average RVer who just wants to push a button and go have a beer!