AM Solar has a combiner box and Zamp to MC4 conversion leads that would work. It would be one less connection conversion. The Zamp setup on our trailer has one pair of wires (10 gauge, I think) from the combiner box to the controller. I'm taking off the old Zamp box on the roof and putting in their new black 3 port box since I added a third Zamp panel last year. I'll have to fuse the panel leads since Zamp relied on a inadequate fuse embedded in their old box instead of fusing the factory leads. I believe their current leads are fused from the factory now.