Only low yield with photovoltaics for private buildings

Around 50 people recently gathered in the ten barn in schlusselfeld to listen to simon heim’s product-neutral presentation on the current situation of photovoltaic electricity. Heim is an engineer at the east bavarian technical university of amberg-weiden.

His work at the institute for energy technology includes, among other things, the development of energy concepts for the public sector.

For the lecture, heim took an exemplary look at an energy concept for photovoltaic systems in private households. In his conservative model calculation, heim was able to show that a photovoltaic system on the roof of an average private home, together with approx. 20 percent own use of electricity with a depreciation period of ca. 20 years a good 2.5 ct/kwh gross yield generated.

In addition, the calculation shows that the installation of a buffer battery, with the goal of increasing the share of electricity self-use, is not yet economically viable and the gross yield with battery tends to decrease. Heim predicts that prices for battery storage will continue to fall over the next few years.

Plants no longer required

He based this assumption on the fact that from 2021 many photovoltaic systems will no longer be subject to the requirements of the renewable energy sources act (EEG) and the owners will then find it difficult to sell the electricity they generate. For these plants, the battery storage is then valuable to increase the electricity self-use ratio.

At the end of the event, the lively participation of the public in the discussion showed that the topic is of great importance to many homeowners and that, at present, there are currently no follow-up regulations for systems that fall outside the EEG requirement and that there is a great deal of uncertainty

Leave a Reply

Your email address will not be published. Required fields are marked *