How many GAS coaches out there with "50 amp service"?

Well,
How about that. I learn something every day. Now I have a better understanding of how things are equipped. Now, one of you stated that he doesn't have an "Inverter" to go along with the 50A service. Could this mean that most of the 50A serviced Class A Gas coaches come with a "Converter/Charger"? and not an Inverter/Charger or, would it be a mixed bag, some with an Inverter and some with a Converter???
Scott