Do you want to know how to fix ps5 controller not charging in rest mode? This is very easy to do. You can try a different usb cable or the rear USB ports to charge. I like using a phone cable and a wall outlet to charge my ps5 controller. Otherwise try resetting the controller. Then to make sure you have power to the USB ports go to settings, then select system and go to power saving settings, then select set features available and turn on power to the USB Ports.