Silas Carpy,
Welcome to the forums.
It is good you noticed there is an issue with charging.
My RV requires the battery disconnect switch to be "on" for the converter, or the inverter/charger to do battery maintenance. If it is "off" no charging happens.
Many RV's do not charge the "chassis" battery. One of the popular ways to make this happen is to add a Trik-L-Start.
It is prudent to carry a volt meter (an elcheapo from Harbor Freight would be good enough)
If the battery switch is on, then check the output at the converter, or inverter charger.
Converters usual have reverse polarity fuses. They sometimes fail.
Others have given you excellent advice in the thread.
Do let us know what the solution to the problem is.