And finally, there is one particular area where solar power are really beneficial to the consumers – rooftopss. Analyses have been done showing that a large part of the expansion in solar installations to come can be placed on roofs. Solar power on roofs are less of an eyesore than on the ground and they protect the grid, because the electricity they produce is consumed in the building beneath and around them.

There are many reasons why more of them have not been built yet. The first one is that the sun unfortunately does not shine more on the panels because they are on a rooftop, so large – in fact very large – roofs are needed for a modern, efficient installation. The second is that they are more complicated. The roof has to be able to bear the installation, everyone needs to know who is responsible for what if anything should go wrong, service is more demanding because it’s harder to access, and the building owner often focuses on the building, on which he will spend his money rather than generating electricity. TOWII has put together a solution we call a ‘on-site PPA’ in which it’s possible to install large solar power installations on rooftops, thereby making the maximum use of the green potential for the building owner or tenant.