Look at fig 6. > Due to low availability of solar energy in December, the required area is as much as 341.0 m2. No one will put 340 sq meters of solars panels

Look at fig 6. > Due to low availability of solar energy in December, the required area is as much as 341.0 m2. No one will put 340 sq meters of solars panels on small house's roof or on it's lawns. And no one is Suwalki would like to freeze in December. There are other technologies like heat pumps etc. But solar is not of use in winter. Not for heating. https://www.e3s-conferences.org/articles/e3sconf/pdf/2018/24/e3sconf_solina2018_00049.pdf https://www.e3s-conferences.org/articles/e3sconf/pdf/2018/24...