mirceacra

Hello, I feel I owe an explanation, I managed to repair my MPP SOLAR PIP4048MS inverter, the problem was with one of the fuse terminals in the inverter (I think it's 150A), where the contact was imperfect, I cleaned the fuse well with fine sandpaper as well as the terminal, I tightened everything back and now the inverter works normally, without any smell of burning or overheating!!

It's normal for that inductor to get quite hot, according to this post, over 100°C. The copper wire, its varnish, and the toroid can all withstand that sort of temperature comfortably. 
Is it possible that dust has gathered on it or the transformer (also gets hot, but not as much)? That can lead to a characteristic smell of "something hot". 

Maybe check whether the burning smell is from something coming into contact with that hot coil. For example, your SOC cable seems to be touching or moving very close to it. If so, try to keep it out of the way, like maybe fixing it with using cable ties.