TEAM CONSTRUCT : What exactly are solar photovoltaic panels?

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TEAM CONSTRUCT : Solar voltaic panels are not to be confused with solar thermal panels. These are two very different technologies that perform different functions.

TEAM CONSTRUCT : Thermal solar panels transform the sun's radiation into heat. The infra-red rays are captured by solar panels in which circulates a convector fluid (water + glycol). The heat is carried to a water heater. The hot water produced can be directly used for a shower, a bath or for washing-up.

TEAM CONSTRUCT : The voltaic system transforms the sun's radiation into electricity. The photons are captured by solar panels consisting of silicon cells which, when connected together deliver a direct current. In order to be used in the home or sold to the electricity supply company, this current must be converted to alternative current.
With a photovoltaic installation, you become an electricity producer, which earns you money.
You receive a certain sum per kWh that you supply to the mains grid.

A photovoltaic installation provides electricity even under overcast conditions.

TEAM CONSTRUCT : The electricity needs of a 4-person single family dwelling, i.e. lighting and other uses excluding heating and hot water, represent approximately 3,500 kWh/year.
A 29 m (4.2 kW) photovoltaic system can produce the equivalent of this consumption.

A number of parameters must be taken into account, however.