Almost all Class A motorhomes(Diesel and Gas) have been equipped with 50 amp service for at least 20 years. 50 amp service is used NOT because of the Inverter/Charger or Power Converter systems. They are used because of having 2 or more Roof AC units and the multitude of optional(now almost standard) of home type appliances like Convection microwaves and washer dryers. You will find that NONE of the Diesels in that past 20 years will have 30 amp service. The Class A Gas rigs you find with 30 amp(even now) are smaller entry level type motorhomes, that they use as a price cut to get a lower retail price. Years ago (more than 20) you were hard pressed to find a lot of CG's with 50 amp service, so having 50 amp was a problem when 50 amp service was hard to find. As of just 10 years ago, the RV industry was talking about starting 100 amp service Motorhomes. That idea has not gone forward. Doug
