Converter/charger trips breaker

Thanks for the reply, it seems that way to me. It's a 1999 HitchHiker that used to have a 45 watt converter / charger. That went bad, so we replaced it with a higher amp model, but the RV mechanic didn't change the circuit breaker. One cold night with the heater running drained the battery, so I hooked up the generator and the converter put out in boost mode and tripped the circuit breaker. I guess I will go with my gut until I find out more info.