The world needs a new source of energy, an unspillable source.

Has anyone combined two different solar panels into one?

I have seen two types of solar panels made. Photo voltaic and water heating. Has anyone combined the two? Silicon cells are not 100% efficient, so why not capture the leftover heat as well? It may take a little engineering to do, but it should be pretty simple. That way, more of the sun’s energy could be captured for a given surface area.