There are essentially two types of PV technology, crystalline and thin-film. Crystalline can again be broken down into two types:

Monocrystalline Cells

These are made using cells cut from a single cylindrical crystal of silicon. While monocrystalline cells offer the highest efficiency (approximately 17%, and the highest close to 24% conversion of incident sunlight), their complex manufacturing process makes them slightly more expensive.

Polycrystalline Cells

These are made by cutting micro-fine wafers from ingots of molten and recrystallized silicon. Polycrystalline cells are cheaper to produce, but there is a slight compromise on efficiency (approximately 13% conversion of incident sunlight).

Thin film PV

It is made by depositing an ultra thin layer of photovoltaic material onto a substrate. The most common type of thin-film PV is made from the material a-Si (amorphous silicon;the conversion of incident sunlight is about 9%-10% ), but numerous other materials such as CIGS (copper indium/gallium diselenide) CIS (copper indium selenide), CdTe (Cadmium Teluride), dye-sensitized cells and organic solar cells are also possible.

Herrman solar packing

Solar power system