Everyone… Thanks for you responses.
it seems my inverter gets hot when it is pumping the maxium into the inverter and then also having to dump the extra power to the grid.
I am also not happy with how hot it gets, So I have ordered 4 USB fans and 2 smart plugs, I have now linked them to “Home Assistant” and if it gets above 40 2 of the fans kick in, above 46 all 4 fans kick in.
I have also added a reminder in my calendar that once I month clean all the dust from the inverter and the fans seem to collect it.
Nothing else I can do as this is just physics changing from DC to AC etc…