Re.
bernard wrote:
We should especially try to understand where the formula comes from :-)
The cells take up a surface and have a limited efficiency, and a surface receives a certain luminous flux, the maximum energy recoverable at 100% of ideal efficiency.
The maximum light energy in France is around 1000W / m2.
But whatever the place where the panels are installed, the calculation will be reduced to this value (1000W / m2) to determine the number of equivalent hours (Sunshine [Wh / m2] / 1000 [W / m2]), are we in agreement ?
bernard wrote:Current silicon cells have an actual yield of around 14%
Over what ambient temperature range is it reasonable to take a yield of 14%
bernard wrote: : a peak power of the order of 140W / m2.
So we can say that there is a direct relationship between the peak power of a module and its surface.
bernard wrote:Taking into account now the duration of visibility of the sun in France, variable according to the place, we obtain between 730h and 1500h per year of production equivalent to 100% of the peak power, this for fixed panels in an ideal position
On a mobile plane that follows the sun, this can be 30% more easily.
By staying in a fixed position, 1Wp of panels will provide between 730Wh = 0,73kWh and 1500Wh = 1,5kWh per year.
So 1m2 of 140Wp panels will supply between 102kWh / year and 210kWh / year.
It's very clear !
elephant wrote:Unless you have needs in islanding (instal completely independent of the network), it is not necessary to take into account your daily needs in Europe, in particular because the monthly production of the months of December and January represents hardly 5% of the annual total, in reverse of need. ((
www.panels-photovoltaiques.be.ma , "technical" tab, "annual production" tab We must think about network injection.
The reasoning must be: not to exceed its annual consumption in order not to give free electricity to the electricity company.
To be complete, I ask these questions for an isolated type PV installation in areas of the Maghreb.
elephant wrote:On the other hand, we don't reason in m², we reason in peak watts.
Yes, but as you understood I wanted to have an idea of the surface occupied by the panels.
elephant wrote:It is up to you then to see how you are going to be able to arrange them on your roof. It is one of the elements of the mono / poly-crystalline choice, the dimensions being very different.
Because of their different yields?
The yield that Bernard gave (140W peak / m2) is rather valid for what type of elements (mono or poly)?
Goods.
Small parenthesis:
bernard wrote:
Your operating system and your service provider
Xp, free wifi
dedeleco wrote:S
What information do you get by not being able to access it?
error xxx ???? Or other ?????
Waiting time exceeded on mozilla.
Oops, Internet Explorer was unable to access the sycomoreen.free.fr page.