Alexander, (Fallon, NV)
Sounds like it's time to check the converter/charger in your RV, Alexander. The AC side of the converter is either plugged into a receptacle or is wired directly to the 120-volt AC system, always through a circuit breaker. Check the circuit for the converter and be sure that breaker is not tripped. If the breaker is fine, then the problem may be interior to the converter.
Another possibility is a blown fuse in the battery charge circuit itself. A fuse could be situated in the converter or in-line near the battery. Check each of these possibilities. Chances are it will be one of them. If all else fails, send me the make and model of that converter and we’ll dig a little deeper.