While recently traveling in a significantly populated area of semi-suburban housing (one-acre lot minimum), seeing literally 1000s of homes, I was struck by seeing that 1) they were all built roughly within the last 10-20 years and 2) that not one of those homes showed any orientation to solar power and/or solar photovoltaic technology.  That is SHOCKING in that where I live in Colorado, there are on average 300 days of full sunshine per year.  That is down from 323 days per year in the 60s when I moved to Colorado.  The thing is that all of the new minimum 1 acre lots had previously been a farm and there were no trees to block access to the shinning SUN during those 300 days per year.