How much solar energy to obtain?

The solar energy can be obtained of two different manners following if one wishes to produce heat or electricity.  One distinguishes the blue roofs (photovoltaic) black roofs (thermal solar).

In fact, the two solar monitoring software thermal technologies and pv inverter call upon the technical totally different approaches.  This are two renewable pv systems of distinct energy, calling upon competences and different equipment.

The energy of the sun is obtained is with thermal solar panels or is with solar inverter panels.

It is interesting to know that the solar energy receipt for every square meter in France is sufficient to do to work between 5 and 10 bulbs.  Any roofing of house receives more energy of the sun than not some will consume its inhabitants, just as well in the north as in the south.

It is necessary besides to put into perspective the period of sunshine difference between the north and the south of the country.  Even if it is evident that these period of sunshine variations will be essential in the calculation of the surfaces of sensors to set up for a project, it is not necessary to conclude that a solar installation is profitable only to the south!

Germany, that is situated in conditions well more unfavorable than the north of France, is the country leader of the solar one in Europe.  The Alsace was one of the regions where the development of the solar water-heaters was the quickest one.

A square well oriented meter, lit up in the middle of the sun, receives in France a maximum power of 1000 W (which would correspond to the electric consumption of 10 bulbs to incandescence, or to 50 lamps).  In an hour, this square meter will be able to accumulate 1KWH of energy!

The unity of adopted measure to quantify the daily solar resource is the kWh/m²/day (killowatt/meter square/day).