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Yield, Costs & Compensation for PhotovoltaicA photovoltaic system for the production of solar power on the roof not only costs money, but also brings revenue and savings with it. Revenues are given in that with a photovoltaic system, more energy can be produced than the household needs for itself.
The excess electricity is then fed into the public grid. For this, the solar system operator is rewarded with a fee. The revenues are very interesting because they are governed by the Renewable Energy Sources Act (EEG) and therefore guaranteed by the state.
The feed-in tariff for photovoltaic systems, which went into operation in the first half of 2010, currently stands at € 0.3914 per kilowatt hour fed into buildings with less than 30 kW.
Here, however, there are graduations that relate to the size of the building. Buildings of 30 kW or more will receive 0.3127 euros, buildings of 100 kW or more will receive 0.02959 euros and buildings of up to 1000 kW will receive 0.2614 euros. In addition, there are still graduations for solar systems, which were built on open land.
The cost of the photovoltaic system
In contrast, there are the costs for a photovoltaic system that has it all. For
a detached house with a solar system of mediocre quality costs between 17,500 and 20,000 euros.
However, the financing of a photovoltaic system is not difficult, because there are usually due to the state feed-in tariff with the bank
even with a 100-percent financing no problems.
In addition, there are numerous subsidy programs for photovoltaic systems, which can be used and thus simplify its financing. The house bank is in this case the right contact, because there are many subsidies through the KfW, the Kreditanstalt für Wiederaufbau, and these can be applied for anyway only through the house bank. The decisive factor is that applications for state subsidies are always made prior to their purchase.
Savings on electricity costs
How high the savings in the area of electricity costs are, can not be said flat rate. First of all, it depends on your own consumption and on the current electricity supplier.
Since many households have now changed their conventional electricity providers and obtain cheaper electricity from an alternative provider, it must be calculated for the individual case how much the kWh solar power comes and how much electricity is currently being paid for one kilowatt hour.