There are three types of technologies that you might find in solar panels or solar cells: Monocrystalline Polycrystalline Amorphous Monocrystalline Solar Panels As far as efficency by square footage, this is the way to go. Monocrystalline cells also do a great job in high tempertures, only loosing about 12-15% of their power. Polycrystalline Solar Panels [...]