I ran my two controllers on the same battery bank with no problems at all, so IMO there is a lot of theory going on here and not that much actual real life.
I ran a Solar30 PWM off a 130w panel plus an Eco-Worthy MPPT of a 230w panel where both controllers were set to 14.8v and they added their amps perfectly all the way up from morning to reaching 14.8v.
There are so many old-wives tales on this forum about not paralleling different chargers on the same bank it is hard to believe they won't change their minds when faced with the facts. :(
