A note with Q5 is interesting
"Also, to avoid unnecessary stress on the controller’s electronic components, it is recommended that when the controller is installed in a sustained warm temperature climate, the controller not operate at full power, close to its maximum ambient temperature, for prolonged periods of time."
Was it the OP with the three breakers one for each panel? If so, and the situation is as above, just switch off a panel or two. Usually it would only be for a couple hours mid-day though, which they seem happy with.
