If you have a terrace,you can install a small solar cell system which can atleast provide some electricity. It may be useful to contact a big manufacturer in USA such as www.advancedmaterial.com. This co. is traded on NY stock exchange/Nasdaq as AMAT. Eventually, a business can be set up by contacting high rise buildings in India etc,..........any momin is welcome to contact me (Retired) at jkdaruwala@yahoo.com................zoeb