Gee, My Hwang Ho monitor, Valiant Butterfly Lithium charger, and other assorted Schezwan produced chew and spit electronics work fine at 40C.
If they didn't work reliably at 40C they would not work here and out the back window they would get hurled.
I can easily mis-engineer an electronic circuit that would operate normally for a few billionths of a second (nanoseconds) at a temperature approaching the surface of the sun.
Proper heat sinking and convection or forced draft cooling design is paramount to electronics or electrical design. An ambient temperature limit of 40C for a device that is supposed to operate in an RV, is laughable.
Some cases an OEM deliberately de-rates a device so as to improve the CREDIBILITY of a product's integrity. Apparently, because of all the factual reports from users complaining 40C is indeed the operational limit, Iota did not do this. They squeezed the specs until they farted.
Thanks for the heads-up Mena, I won't let an Iota get near me. I don't like wasting my time...