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.
If you want an RV and have an old van, you can convert it into a simple travel vehicle for your needs. A smaller van like the Grand Caravan might be too small; you should try something the size of a Chevy Express or Ford Econoline.ecide on power sources in the RV van. Some items can connect to the vehicle battery but you can't risk draining it. Try stocking two or three deep cycle batteries connected to inverters with plug-in sockets.