Yes, roof-top installation is expensive, but if you combine it with other maintenance of the roof, it gets very cheap. And any new roof should have it planned i

Yes, roof-top installation is expensive, but if you combine it with other maintenance of the roof, it gets very cheap. And any new roof should have it planned in with the setup. Also, here the northern latitude helps, in Germany people start putting solar panels on walls and fences. There is plenty of cheap space and the efficiency isn't too bad considering the cheap panel costs.