If your authorised representative in the EU put your products under his/her own name, then she/he takes over your responsibilities. In this case he/she must have sufficient information on the design and production of the product, as he/she will be assuming the legal responsibility when affixing the CE marking.
Many of the larger inverters come with a built in charger. Typically a 2000 Watt or larger inverter will have a 50 to 100 Amp 3 stage charger. These are much better than the typical RV converter/charger. If you are planning on a more powerful charger anyway, the combo units make sense.
Class A RVs are the largest motorhomes, they range from 20 feet to more than 40 feet. There are many floor plan options available for a Class A. Also called diesel pushers (the engine is in the back), Class A diesels come in lengths from nearly 30 feet to 45 feet.