Solar panels are made out of
- Epitaxial silicon
- Mono-like-multi silicon
- Polycrystalline silicon
- Ribbon silicon
- Cadmium telluride
- gal- lium
- Amorphous silicon
- germanium,
- Indium,
- Selenium, and
- Tellurium
- Copper
- Silicon film
The production cost from solar panels are based on a lo ofthese raw assets, for instance it may depend on the cost of items like.
Silicon price by type U.S. 2017 | Statistic
However, overall the costs associated with solar panel materials, will yield a high Energy Returned on Energy Invested, so ultimately you are getting a high enough value to pay off fast, which reflect lower costs then buying from your energy provider entirely.