it also depends on country and weather conditions for solar panel electricity generation. In colder countries e.g UK, it is probably not as efficient as wind turbine technology for electric power generation. Still, thousands of houses in UK are built with solar panel installed on roof. Have a looked at attached image for typical UK solar panel house installation.

Wind turbine technology is also becoming very popular in UK due to strong mighty storms that country generates, I happen to see hundreds of wind turbines dotted around the country. Its fascinating to see them lined up rotating continuously being used for some useful purpose.