The concern is not just about the usage of renewable energy sources but how much investments are being made into such long-term returnable projects.
RE or renewable energy resources are known to be an expensive mode of investment and the return is also late. How far are you with the investments being available to such installations in 2019?
Photovoltaic and wind energy resources are the primary and earned more focus in terms of investments made in a billion euros. The investments are huge and can be seen by far the most important energy resource.
In my opinion, photovoltaic panel has got the higher demand for its multipurpose usage and on a wider scale. The investment in renewable energy installation is high in Germany.