In the photovoltaic the solar power converts directly into electricity in the solar cells of a module. This procedure is emission-free. The produced electricity can be stored in accumulators or fed into electricity grid. Although the production of solar plants is more expensive in Germany, it is often not calculated, that many other ways of the electricity production have substantially higher follow-up costs. Because solar modules produce direct current, but the household and the majority of the energy consumers are dependent on alternating current, so the produced direct current must be converted by means of inverters into alternating current. The photovoltaic in Germany is a lucrative alternative for the consumer to the power supplier, emission-afflicted energy production and also a good way, in order to reduce the net load, by decentralizing of the electricity production.