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	A solar panel consists of electrically connected solar cells. Solar cells transform the sun light into electrical energy by means of semiconductors. Cell types: Crystalline cells (mono- and polycrystalline) Thin film cells (e.g. amorphous silicon cells)

• Monocrystalline solar cells are cut in thin slices (wafers) from a long, drawn ingot silicon stick of an even crystal structure ( mono).
• Polycrystalline solar cells are cut in Wafers from a cast silicon block. In general monocrystalline cells work more efficiently but their production is a little more expensive.

The single cells of a solar module are soldered in rows into an electrically connected cell string.
The cell strings are joined to cell panels by diodes and laminated between glass under vacuum, EVA-foil and tedlar foil.

A solid aluminium frame binds the completed laminate unit.

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