Mine does not get hot but I did install it with a metal plate between it and the plywood panel it is mounted to for heat dissipation in the event something goes awry. The installation instructions clearly say to mount it on a non-flammable substrate.
Excerpt:
● Install the product in a heatproof environment. Ensure therefore that there are no chemicals, plastic parts, curtains or other textiles, etc. in the immediate vicinity of the equipment.
● Mount vertically on a non-flammable substrate, with the power terminals facing downwards. Observe a minimum clearance of 10 cm under and above the product for optimal cooling.
● Mount close to the battery, but never directly above the battery (in order to prevent damage due to gassing of the battery).
My Solar controller panel is mounted to the inner surface of the camper sidewall under the rollover sofa. My camper AGM battery bank is in vented plastic battery boxes immediately in front of the panel and also under the couch seat.