The answer to your question depends on the size of the converter in your RV. I use a EU 1000 to charge batteries in my coach and have used it in two previous RV's. It will power a 40a converter but nothing bigger. For example I have a Iota 45a converter that I tried and the 1000 would NOT power it.
The converter/inverter in our present coach can be adjusted for AC draw and DC output so I usually set the AC max draw at 5a and DC output to 30a and the 1000 doesn't have to run flat out and is nice and quiet.