I abused it after leaving it out in the rain? They weren't the cheapest, I was trying to get a decent set, they sure seemed to be well built, the clamps are quite good, and there was no indication they used Al wiring. It can't be just leaving it out in the rain, as mentioned, a good percentage of homes have triplex power lines with exposed neutrals so you'd expect them to routinely lose power, and I often see welders on trucks with their cables mounted exposed though I doubt the cables use Al. There had to be something unusual going on, that's why I'm liking the idea of the tannins from the oak tree. Would anyone here really expect this to happen from just rain? Weirdly, it couldn't be squirrels, in 9 years, I've never seen one around my property, which is near Canyon Lake in central Texas, so there's plenty of squirrels in the area, so no idea why I don't see them, plenty of racoons and skunks and occasional foxes and coyotes though, and one donkey come to think of it.
Well hell, I was some googling/wikipediaing and turns out tannins can be used to prevent corrosion on aluminum, so that's confusing.