I do not think so as the mentioned issue seems irrational !!! I guess that such prosumers deserve governmental incentives for network load relief, and reduction of GHG emissions caused by fossil based generation of power.
That is really strange. In addition, the Günther Häckl explanation is somewhat unconvincing. He said, "compared the situation to taxing people for food they grow in their garden in order to subsidise farmers". I guess that there are either hidden technical issues, or economical reasons that derive that type of tax.
IEA PVPS published a report in 2016, which can be downloaded at: http://iea-pvps.org/index.php?id=382
The situation in Germany is as follows:
"Since 2014, the surcharge on the electricity bill that finances feed-in tariffs has to be paid for the self-consumed electricity from new PV systems. Installations below 10 kW are exempted while other installations have to pay 30% of the surcharge, increasing to 40% in 2017. The exemption is valid during 20 years, after which the full surcharge will have to be paid."
Possibly YES, but likely NO. I do not know of any country that allows for or requires a private solar PV system owner paying a self-consumption fee. However, where a third party has invested in (partly or wholly) the PV system than users of the electricity may be paying the investor for their consumption. Or that consumption may be considered as rent paid to the "landlord" upon whose property the PV system is placed. Example, a large PV system put upon the roof of a large commercial building by a solar energy provider.
It makes economic sense to demand for payment for any excess production above self consumption . Further, where a government agency has invested substantially in any networks to bring the production on stream then it might not be unreasonable to demand a reasonable surcharge from the affected private producersc
Unfortunately in Spain the law regulates a rate for installations starting from 10 kW. Minor photovoltaic plants, the most widespread at the domestic level, do not have this charge, but they do not have any help from the government either. This regulation is widely handled by the photovoltaic sector and suppresses the expansion of photovoltaic self-consumption and distributed generation.
As I understand the situation in Germany, the tax is a surcharge on the bill for grid supplied electricity, so it is not a tax on self generation or consumption. To make sure you don't have to pay it, simply ensure your PV system supplies all the electricity you require so you don't draw anything from the grid. However, I just cannot see how this is going to work in Europe in the winter. You just don't get enough solar.