We have replaced the factory drapes (over and across the bunk) with thermal blackout drapes in length @ 84". The factory drape just covered the bunk area for privacy. They offered No heat Cab Heat transfer protection to the Cabin living area living an opening to the driver and passenger seats.

TEST
Today, it is 100 degrees outside, A/C is set at 78 degrees and the Front cab transfer heat approximately 110 degree (F) within the cabin.

DRAPE REPLACEMENT ASSEMBLAGE...

Tried to jump start 2018 sun star--battery ok--turn off batteriesand hooked up jumpers and nothing to ignition--the radio works but no power to ignition switch--no lights also???> Help is there a relays switch that has been yapped? Thanks Howie