even if something gets in there. The vent is a sealed pipe; if water enters at the top, it flows out at the bottom again, just like the toilet and bathwater that is connected to the vent.
: What I mean is that you can't rely on them to keep the water out. Roof tile systems have a sophisticated water drainage system that directs rainwater into the gutter under all kinds of wind and weather conditions and keeps the roof dry. Solar panels do not have that.