question

In principle, yes, but you need to watch temperature and humidity. If you download the manual, the specifications are there, probably max 50C and 95% non condensing humidity. IP rating relies on connections being mounted down. Power output will drop with temp increases.

I know it was IP43 but IP rating as i know is for the particule/water/fume can enter in the case not just in the connector

But it was not sealed completely when it's an IP43 so i don't know if they have part that can make spark or something else inside that is why i don't know if i can install it in the engine room

Temp and Humidity is fine for me i monitor it since 2 years never above 45C

Thanks for your fast answer and excuse me for my poor english. :)