Solar panels are fully encased in glass enclosures, so I'm pretty sure there is no runoff, but yeah putting them above water ways like this does make you think.

Solar panels are fully encased in glass enclosures, so I'm pretty sure there is no runoff, but yeah putting them above water ways like this does make you think. The heavy metals in solar panel waste you typically hear of is for discarded and broken cells in landfills iirc.