First of all, what you are describing is a total loss of 12-VDC into the RV from the COACH battery(s). I recommend the following;
1- Check that you have your RV's AUX switch turned ON.
2- Check that your converter (charger) is trying to charge your battery. This should be indicated by measuring around 14.5 volts across the battery terminals if charging, or around 13.5 volts if they are fully charged (measuring around 12.5-VDC means the battery is not charged.).
3- Measure that you have the same DC voltage across the input wires of your DC fuse panel.
4- Check that the one or two 30-AMP input fuses on your DC fuse panel are not blown.
After all of this, you should have DC voltage to some of the accessories that you listed.