Just keep the cheap controller that comes w/ the suitcase to reinstall if warranty is needed.
If me, I'd sell the suitcase, buy 2 new roof mounted panels, w/ a decent controller.
I love my Blueskys flush mount LED controller, but not cheap !!
I have 300 on the roof, plus a 75 watt panel w/ cheap controller for portable for if I ever get stuck in the shade, it will help a little. Have never used it yet.