Can't speak too much about Photo voltaic panels, as its not my absolute area of expertise. However, the thermal panels can, & will reach 130'C. The stagnation temperature for a good thermal panel is around 200'C.
Yes, that is Celcius, not Farenheit. Most systems are designed to work around the lower end, at about 60'C. We mostly turn our gas off about March, until October.
Ian