[philipkglass]

Cadmium is only required in cadmium telluride solar panels, which have less than 5% global market share. Lead solder is still common in crystalline silicon panels, though not universal; modules built with heterojunction cells typically avoid solder because the cells can't tolerate temperatures that high:

https://onlinelibrary.wiley.com/doi/full/10.1002/pip.3688