I looked at my instructions
so seems the same, I do not think there is the room it shows, there is no inverter either side of it, and do not think I have the room under it, as hard to reach on/off switch.
But been there for 20 months now, so have no intension of moving it. It is in about the coolest room in the house, had it been mounted in the loft where they wanted to put it, then it would have got a lot warmer.
I did a "find in page" search, for mm, which only found the word "Communication" there is nothing in the text, only that picture, which also shows

so seems to be a suggestion to mount, so heat can get away, and says
The ambient temperature is required to be within -25°C ~ 60°C.
and where mine is, it is unlikely to even get to 25°C never mind 60°C as it is basic in entrance to a basement so gets very little sun.
Had the inverter been in the loft, then would have been worried about over temperature, but loft fitting of batteries no longer permitted, and the inverter tends to be near the batteries.