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"There are three main types of solar panels: monocrystalline, polycrystalline and thin-film. As for efficiency and price, monocrystalline has the highest for both, then polycrystalline, and then thin-film. The best choice for you is highly influenced by your roof configuration, how much you're willing to spend and how much energy generation you want."
<https://www.ecowatch.com/solar/best-companies/pa/kutztown>