Functioning of a photovoltaic installation
In a solar power plant, solar light ist transformed into solar power. A solar power plant consists of ceIls combined into modules, inverters and relevant cabling.
When solar light falls onto a well endowed silicium slice, a low electric potention occurs between top and bottom. By mounting adequate contacts, this direct current voltage can be used. These endowed silicium slices are called cells.
Numerous cells are being assembled behind a hardened glas plate, interconnected in rows or parallel and either infused into synthetic material (one glas technology) or covered by a second glas plate (double glass technology) .. The result is called a module or solar generator. Mostly they are being framed in aluminium. Each preassembled module has a plus and a minus cable with socket or plug leading to the outside.
According to the number and the interconnection of the solar cells in a module a certain direct voltage and a related power intensity result. By multiplying them you get the top performance of the module under standard conditions expressed in Watt peak (Wp). Small modules have a low performance and large modules have a large performance.
Several of these modules can be connected parallel to increase the power or serial to increase the tension and thus form a string. The inverter now has the task to transform the direct current of the modules into a net compatible alternating current and feed it into the network of the power supplier. The inverter gets the necessary information therefore from the net. Is not netpower available, the inverter cannot transform direkt current into alternating current. By using several strings and several inverters solar power plants of any size can be constructed.
By referring to our graph on roof alignment and calculating the expected power harvest, you can evaluate on your own, whether your roof is appropriate. Should you expect any technical or shading problems, please be so kind to send us the filled in form roof evaluation.
