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Pulled two solar panels off one of my arrays, because a few of them have hot junction boxes from bad connections. Replaced those with spares and got the array back fully online (one of them has been bypassed for arc fault warnings that, digging into the junction box, look legit).

Then I replaced all the fancy, spring loaded, "replace the back of the junction box for new functionality!" interface stuff with some vintage, 1980s style soldering and bypass diodes. Because I don't care about the optimizers on my well-sited array with no shading, and I don't need rapid shutdown for a ground mount array, etc.

And then proceeded to short the leads, put them in the sun, and ensure that the junction box guts didn't get hot, while observing just how brutal on panels doing this is - you really highlight the difference between cells thermally, when in "normal running," you don't see any differences in the array.

And now I'm writing all this up as a blog post. :)