Yes, those could be used, but I do not have any experience with them.
On RV installs, one problem is that you never know what is going to happen with shading in the campsite you end up in, Consequently, it is wise do your panel arrangement and install assuming the worst.
If you have 3 of those controllers and room in the RV, you could consider putting all three in so if some of the panels are shaded there is no chance of it impacting the others. You could put 2 parallel strings of 2 in series on each of the 3 controllers. One added benefit of doing this is that since no controller has more than 2 in parallel, you don't need the in-line fuses. The second benefit is that the combined capability of the 3 controllers is significantly greater than the 970W of your panels.
The other thing to do is to put a blocking diode on each serial string. That way if one string is weak, it does not pull down the others.
Finally, make sure there is a bypass diode on each panel.