Photovoltaic System – How It Works
A solar power system (photovoltaic system) allows you to convert sunlight directly into electricity. This conversion is done by so-called photovoltaic effect, the interaction between sunlight and radiating doped (contaminated with foreign elements) semiconductor material of the solar cell. This leads to the release of electrical charge carriers, which are paid by means of metallic contacts. The so-generated DC (direct current) can be converted by a solar inverter to AC (alternating current). The heart of a solar generator is the solar or photovoltaic cell. They consist of high-purity silicon and have an average particle size of 10-20 cm. Several solar cells are combined to form an electrical unit, known as the solar module. Commercially available solar modules have a capacity of between 170 and 265 Wp (p = peak).
By now, solar cells can reach an efficiency of up to 20 %. At the same time the photovoltaic industry is investing in research and improving its manufacturing processes to achieve ever higher output. The efficiency of crystalline (poly- and monocrystalline) solar panels is between 12 and 17 %. High-efficiency photovoltaic panels can produce 265 Wp per square metre of generator area.
The optimum electricity is gained with a south-facing solar system at a 20° to 35° pitch. In systems with lower and higher angle of attack, or a direction to the east or west, the effectiveness decreases only up to 20 %.
This reduction in output means that photovoltaic solar power plants with, for example, a different roof situation can still be profitable.
The great thing is that solar power is completely “clean” and relieves our environment with about half a barrel of carbon dioxide per kWp generator power in the year.
* kWp = Kilowatt peak = peak power
19. February 2013
The French Ministry of Ecology, Sustainable Development and Energy has published the feed-in tariffs for PV installations for the last quarter of 2012 and the first quarter of 2013.
For the fourth quarter of 2012, the FiTs have been retroactively adjusted in line with the government’s new urgent measures to support the domestic solar industry. Residential installations (0-9 kW) were € 0.3415, public buildings (0-9 kW) were € 0.2279 and all other buildings (0-12 MW) were € 0.840.
This quarter, the government has set all 0-9 kW installations at € 0.3159. (more…)
14. March 2012
We’re exhibiting in Verona. Solarexpo will take place from May 9th to 11th 2012 in Italy. RenoSolar GmbH will present comprehensive solutions for pv installers. Come and visit us at our booth in hall 8, D3.
We’re looking forward to meeting you!
10. February 2011
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