I have had the Coleman 13.5 K PS installed on our last two trailers for that very reason. I have had no issue running my current unit on a single Eu2000 at 97 deg. F in my testing in Dallas. In addition, Coleman indicates that their PS model has more cooling capacity compared to their standard 13.5 K unit. I believe the PS version uses a scroll compressor based on the tall height and small diameter but do not know that for a fact. Scroll compressors do not loss capacity as fast at higher temps compared to conventional piston compressors.
Dick
