PowerBox Pro, 60C+ in the sun..

Hello Folks!

Some days ago we installed PowerBox Pro in one of our masts.

It serves one SXT (124mA, 24.3V, 3.5W) and one RB435G (270mA, 24.3V, 6.5W).
When the sun shines on the PowerBox Pro temperature raises up to 60C and more.

Specifications say:
Tested ambient temperature -40°C .. +70°C

I start to get worried that it will degrade its lifetime, any who have experience here ?

I think about to put up some kind of sunshield in front of it trying to mitigate it.