What kind of solar panels?

We deposit amorphous Si on glass panels then dope the Si to make the junction. We get lower efficiencies than the single crystal Si but our costs are dramatically lower and we aren’t competing with the chip makers for the wafers. Si ingots are currently at $50/Kg and have gone as high as $200/Kg on the spot market. That’s a lot of money for energy and sand, but that is because it takes a lot of energy to melt Si.
I love the job because it is entirely different from what I was doing before. Well, not entirely. I was programming before, but not in a graphical data flow language. I seem to need to learn an entirely new skill set every 5 years or so to keep making money.