I Installed Solar system from this company. It is keeping the two batteries charged very nicely. We can watch a movie at night, and the batteries are fully charged by the next evening. I suspect we could watch a couple of movies, but I haven't done this yet. We use LED light bulbs throughout the RV to reduce consumption. I wish more people would go solar and use their generators less. Solar won't power the microwave or air conditioner, but it powers everything else.
Some people complain about the inverter, but I think it does fine. The complaint is that it doesn't have a meter to show voltage or current. In my opinion, you only want this in the beginning to see how efficient your system is. The inverter has LEDs that show when it is charging and when it is in maintenance charge mode (batteries full). I have an inexpensive volt meter that plugs into the 12 volt outlet. Good enough for me.