Max solar input voltage is 25V. Egads, why would anybody bother making a SCC with limitations like that?
If you have not purchased this or can return it, you'll be far better off with a quality SCC.
Seconded on both points. At LEAST let it take closer to 50v. F Renogy.
That particular charge controller seems to be designed for DC to DC alternator charging, and solar capability was added as an afterthought. In my opinion, it sort of defeats the purpose of an MPPT controller if it won't take higher voltages.
The one "top-teir" piece of equipment that I have is a Victron MPPT solar charge controller. I went through a handful of cheap ones before I realized that you get what you pay for, ESPECIALLY with SCC's. Everything else in my system is able to be bypassed, EXCEPT for the SCC. That makes it, IMHO, the most "mission critical" part of a solar setup, and I don't want to risk failure in an emergency. (My system is designed for backup power in grid-down situations, and my trailer / "camper").
You can most likely get by with a cheaper SCC, but I can guarantee that you won't regret buying a nice one. Plus, I'm a sucker for data export. ?
I would definitely return that "SCC" if it's still able to be. There's other options that cost about the same, that are much better then Renogy. If you can't return it, it's not the end of the world, but you'll definitely be limited in regards to how you can configure your panels.
A side note;
OP could probably rig up a Reverse DPST switch on the input of that controller, and switch between solar and alternator charging. That IMHO, may redeem that controller, unless OP already has alternator charging capability. Just thinking out loud here.