But that seems to only be an issue when they are literally dumped in a landfill. In the case above, where they are mounted, why would it be an issue? Or, are y

But that seems to only be an issue when they are literally dumped in a landfill. In the case above, where they are mounted, why would it be an issue? Or, are you saying that they leech, say, when it rains? But in that case, wouldn't roof mounted solar panels be equally bad as in leech heavy metals into home soil and I had not heard that to be an issue.