My uncle just updated his Airex motor home to a 75 amp service... He wanted to run both a/c's at the same time,,, but it has a switch panel at the back og the coach,,, 2 switches... if it is up then the rear a/c runs,,, if it is down then the front a/c runs...What he wants me to do is make it where he can run both a/c's just by turning the controls on the units (bty ,, they are dumper a/c's) Anyway i pulled the switch panel and i was amazed at how they have this wired... I think that it would be better to pull a new line off the converter box to the rear a/c and leave the front the way it is.... Has anyone seen this prob???? also is it a good idea to pull another feed for the rear a/c???