I've done some research on exactly this, and the efficiencies of TEGs makes this a tough prospect. It started to work out in our favor when using concentrated s

I've done some research on exactly this, and the efficiencies of TEGs makes this a tough prospect. It started to work out in our favor when using concentrated solar to reduce the amount of paneling needed, but that's no longer an economic driver, and you get a much better return on investment by skipping the TEGs and just plopping a few extra panels down in a lake. You can also flip the configuration and use TEGs to generate power from the solar heating, but the terrible efficiency bites us again and you're better off buying more panels instead.