Nothing is turning, nothing is moving, but it provides energy: that is photovoltaic. It is predictable for the different regions. Why it is as much under critic at present time? Let us answer this question in this article.
Photovoltaic made the biggest progress within the last 2 years compared to all renewable energies. The prices for panels dropped by factor 4 from 2 Euro/Watt peak to 50Eurocent/ Watt peak. That is the biggest progress for all the renewable energies in such a short period of time. It is coming with this progress to grid parity. That means, that the energy produced by photovoltaic is price wise comparable to fossil energies. Why the photovoltaic is still under discussion and not simply used as an economical solution for energy production?
Looking to the availability of sun energy, we can see in the picture below, that surely the sun irradiation is higher in south Europe than is northern Europe. So the efficiency of sun power production will be higher in southern Europe. On the other hand, the northern part of Europe shows higher efficiency to produce wind energy. This is less efficient in the southern part of Europe. The logic would be for me, to focus in the northern part of Europe more on wind energy and in the southern part more on sun energy. To produce in both parts of Europe will reduce the transmission costs and will assure more stability in the grid.
Because solar and wind energy will become for Europe long-term the dominating energy sources, Europe has to deal with the intermittency of this energies. Biogas, natural Gas and Geothermic will become a stabilizing role, but it cannot completely solve the problem of the intermittency of this energies.
The picture above shows the four working areas, to solve the problem of intermittent energy production.
On the interconnection of the grids, the storages, the optimization of the demand side and a flexible usage of renewable energy sources we should focus.
It maid be necessary not to come meanwhile in difficulties of energy availability to build up a few gas power plants. I personally cannot understand is to keep nuclear power in account. We have sufficient examples, that we cannot finally assure the safety of nuclear power plants and we have still no solution to store the nuclear waste. In Tschernobyl they are covering the destroyed reactor at present time with a new concert cover. The time to keep care on the Tschernobyl reactor needs another several hundreds of years. In Germany the nuclear waste in the final storage of “Asse 2” close to Wolfenbuettel has to be taken out and has to be brought to a safer place. We have no solution to assure the coverage of nuclear waste for the time it needs. So to use nuclear power as an intermediate solution to take the time to build up the renewable energies is irresponsible.
The proper mix of renewable energies is the only way in the future. To do this change in an economically adequate way is our responsibility