Monocrystalline solar panels have an 18 percent efficiency rating, polycrystalline solar panels rate at 15 percent, and amorphous panels have a 10 percent efficiency rating.
Monocrystalline panels are manufactured from a large silicon crystal.
Polycrystalline panels are typically more affordable than monocrystalline panels, but they are not as efficient at absorbing sunlight and converting it to usable electricity.
While they are the cheapest to manufacture, they are less efficient than monocrystalline or polycrystalline panels.