Seeing as its been so hot recently, seeing this on YouTube got me interested. Basically, inverters, CC's etc use ambient cooling. When it gets stinking hot, they start to have issues. This new video shows how this chap noticed his solar output was dropping a lot so he investigated why.
https://www.youtube.com/watch?v=3OnCUvhlTWg
Running home solar in a heatwave
Re: Running home solar in a heatwave
Sorry for the late reply. I also noticed that my output in the heat has dropped.