Sun renewables solar panel problem( with pictures )

[Jeremy Harris]

Overheated connectors are almost always the result of a poor cable crimp joint internally, as I mentioned above.  At one time there were installers fitting connectors with the incorrect, or wrongly setup, crimp tool, and there were a spate of connector failures, including some small fires, I believe.  Your failure may well be a one-off, due to a single duff crimp (it's pretty hard not to notice a connector that's not fully pushed home), but I'd keep a regular eye on the outputs from the two strings, as shown on the inverter display, just in case there are any more potentially duff connectors up there.