I have this same Renogy 200W suitcase. I removed the PWM controller and simply wired it in parallel with my other panels into my charge controller.
I had used the Renogy Rover 30A up until about 6 weeks ago. I switched to a Victron 100/30, which is equivalent to the Renogy in terms of input/output. NIGHT AND DAY difference. That dang Renogy gave me so many headaches I won't repeat here and their customer service gave me even more headaches (super friendly but inept to help and kept asking the same questions that I answered again and again...) Not only does the Victron simply WORK like I expect it to, my rough math suggests I am getting up to 30% more production from the same panels using the Victron compared to the Renogy.
If you do go with the Renogy controller, there is a very good and very long thread (something like "40A renogy rover settings") that you will want to read from start to finish to learn what you're dealing with and how to setup the Rover properly. Even then, I hated the thing. SO glad to be done with it. Had I realized how much of my life I would waste learning how bad Renogy sucks, I would have gone with Victron from the very start. But the physical looks and low price of the Renogy was what hooked me, if I'm honest.
This forum is generally not fond of flexible panels for reasons I understand. One of those reasons is that rigid panels tend to produce better. However, we recently added two 100W Sunpower panels (the ONLY panels I recommend if you're going flexible). I laid the flexible 100W Sunpower panel on the ground in full sun and tested voltage and amps. I don't have the numbers anymore because I didn't write them down. Then I set up the Renogy 200W suitcase and angled it towards the sun and took measurements. I divided the suitcase numbers in half, because it's 200W compared to the flexible 100W. The difference was shocking - the flexible panel (flat on the ground), produced better than the rigid panels.
Many on this forum have said that Renogy's stuff is overpriced junk (but wait, it's cheaper than Victron!) and I agree. They often make an exception - that their rigid panels are decent and of decent value. I don't have any other rigid Renogy panels to compare to, but based upon my small experiment here, I don't agree.
IMO, the best feature of the Renogy folding suitcase is the semi-padded zippered case. The zipper sucks, but it works enough to close up and this really helps with storage. The panels fold in such a way that the glass faces out, so the zippered case is essential when storing it in the back of a vehicle, otherwise it's surely to get scratched or cracked.
We got a good deal on the Renogy suitcase by buying it 'used' on Amazon Warehouse. I think we paid less than $180. Were I to do it over again, I think I'd rather build my own suitcase with known quality 100W panels and hinge them so the glass faces each other when folded and put a piece of felt between them for storage. The suitcase is a bit heavy and I'd much rather have that weight pay for itself in producing as much energy as it could.
Hope that helps!