Self Consumption PV Systems

With the approval of the Federal Council and the European Commission, the controversial EEG reform (Renewable Energy Sources Act) will enter into force on 1 August. What is the meaning of the EEG reform now especially for small photovoltaic (PV) plants, for example on homeowners? We have looked at the most important new regulations once and counted on whether private PV installations are still worthwhile.

Introduction Of A Self-Consumption System For PV Systems

According to electronicsencyclopedia, the most important innovation for future solar plant operators within the EEG reform is the introduction of a self-consumption package. The operator must then pay a specific percentage of the currently applicable EEG apportionment on every self-consumed kilowatt hour of the own PV system. From August to the end of 2015, 30 percent, then by the end of 2016 35 percent and from 2017 are 40 percent due. This applies to all photovoltaic systems, which will go into operation from August 2014, except for plants with a power output of less than ten kilowatts (kW). Existing installations are also exempted if PV power has already been consumed by the end of July.

Amount Of The Self-Consumption Contribution In The Medium Term At 2 Cents Per Kwh

But what does this mean for new plants above 10 kW? If, for example, an installation is to be installed by the end of the year and consumption itself is used by the end of the year, an own consumption contribution of 1.83 cents per kWh will be due on the basis of the current EEG apportionment 2014 of 6.24 cents per kWh. However, these 30 percent will not be valid for the next 20 years, but will gradually increase to the above-mentioned 40 percent from 2017. Whether or not the load on self-consumption is increased or decreased in absolute terms depends on the future EEG levy. Experts assume that this will only increase very slightly and then decrease. The private consumption contribution should therefore remain below 2 cents per kWh in the medium term and even fall in the long term.

PV Systems Remain Profitable

We have now used the self-consumption calculator for solar power to calculate whether a purchase of a plant is still worthwhile under the new EEG conditions.If one starts from a 15 kWp PV plant in northern Germany, the energy costs of about 300 euros and the revenues generated by the feed-in tariffs of about 1,100 euros per year are saved. With an investment sum of EUR 28,000, an average annual return of 5% is still to be expected.

The Apportionment Of Investments On Home-Ownership Is Generally Excluded

Since typical solar power systems on homes are generally less than 10 kWp and are exempted from the charge, these plants can still be operated profitably.Therefore, despite the reduced interest in the new installation of a photovoltaic system, it is to be assumed that the PV market is merely decelerated but not decelerated by the self-consumption contribution. In addition, the conventional electricity market is also working for photovoltaics: the further the household electricity price increases, the more profitable is self-consumption. The self-consumption contribution of about 2 cents per kWh could therefore be compensated by the household electricity price in just a few years.


A guest contribution by Robert Dölling. He is responsible for the social media activities at the DAA, Deutsche Auftragagentur GmbH, and writes privately for the energy bloggers.