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Clean electricity from the energy of the sun

Winning solar electricity from solar energy is a clever and environmentally sound method: no scarce resources are used nor are there any emissions to pollute the air or damage the environment. The sun is always available and its light never costs anything. Every building owner can use solar energy in order to generate solar electricity. This he can feed into his local provider’s electricity network and for that, he receives a “feed-in tariff” that has been set by lawmakers for the next 20 years, thanks to the Renewable Energy Law (REL). But the self-generated solar current can also be used in whole or in part by the operator; even for this there is remuneration – the savings from not having to draw on other current. With or without own consumption, you can make money with the electricity you produce yourself.

WINAICO Module als schematische Darstellung des Einsatzes
Schematic representation

How does it work?

In order to convert sunlight into electricity, you need a photovoltaic installation on your roof. A photovoltaic installation consists of panels and inverters:

The panels consist of several solar cells made of silicon semiconductors connected in series. The silicon in a solar cell is doped differently on its top and bottom sides, so that a positive and a negative surplus of charge carriers is present. At the transition of the two differently doped layers, an electrical field is produced.

As soon as sunshine falls on the solar cells, the silicon conducts and the voltage is drawn out of the cells through metallic contacts. That is how direct current (DC) is generated. 

 

The inverters are necessary in order to convert the DC into 230 volt alternating current because only then can the electricity be fed into the public electricity network. 

 

An electrical meter measures the energy fed into the public network in kilowatt-hours and the network operator reimburses this. If the solar electricity is to be used by oneself, three electrical meters have to be installed to measure energy consumption: a PV meter for the solar energy that has been produced along with a feed counter and a draw counter or a two-way meter. That is how the network operator will know how much electricity has been fed into the network and how much has been used by oneself, making it possible to calculate the corresponding remuneration.