Solar Panel Types

Tried and True Monocrystalline...
For many years monocrystalline solar modules have been the mainstay of the solar market. Those iridescent blue faced panels you have been seeing on rooftops are probably of this type of panels. They have distinct rounded individual solar cells visible from all angles stacked in very uniform rows. This type is produced from a single silicon ingot or crystal. Manufacturing costs are very high because of this process making them the most expensive solar modules on the market. They are, however the most space efficient type of solar panel making them the correct choice when space is at a premium. Monocrystalline cells have a life expectancy far exceeding 25 years, probably over 50 years. The only real problem with this type of cell is it's fragile nature making it a requirement that it be mounted in a very rigid frame.
Polycrystalline...
Polycrystalline modules are manufactured from a block of multi-crystalline silicon. They are usually square and have a varied, almost mosaic-like appearance. Only slightly less efficient than monocrystalline modules they are cheaper to manufacture and thus cost less money. You can expect the same great lifespan as monocrystalline cells too.
Thin Film...
Recently a new product was introduced into the market that could provide some much needed answers for solar power users. Amorphous silicon PV or thin film technology could make rigid solar panels obsolete if some better research is done. Thin film panels are produced by applying silicon material on glass or stainless steel, or more commonly between two pieces of flexible laminate material. Solid or rigid thin film panels are in use by flexible laminated thin film panels are more popular.