Hi @aparicioluise,
Yes, it’s definitely resistant to rain and also dust. To be more specific, Reach RS2+ is IP67 rated. So, it’s perfect for such use-case! We even discussed it recently in this post: Is it possible to use Reach RS2+ as a permanent base?
It’s better to place the permanent base somewhere on the roof, if possible, to provide good satellite reception. And @PotatoFarmer mentioned RS232 port for power supply. I double it because there is a feature to automatically turn on and off the receiver while powered from RS232. Very handy when the receiver acts as a permanent base.