22 August 2018. https://www.wiwo.de/technologie/green/studie-haushalte-auf-dem-land-liegen-bei-energiewende-technik-vorn/22940582.html
Article from Wiwo green, most influential business news: Most spread in Germany are Solar Thermal Systems, especially amidst owners of houses. The article quotes a poll among 3,700 households by the state bank KfW. The Germans are to 90 % keen to protect the planet from further world climate change, especially in house building – with solar tubes collectors.
Backstage information: From 1,000 (one-thousand) watts from solar radiation and energy the solar tubes collectors gain back 800 watts in efficiency. PV (Photo Voltaic) only gains 10 %, i.e. from 1,000 watts they gain 100 (one-hundred) watts.
