What is possible with rooftop solar and how do we get there? 

A good place to start is to check out Energy Sage  web site.  They have lots of articles on their web site that are help to analysis your renewable energy options.

Another good place to check out the Google’s Project Sunroof program.  They analyzed the roofs in our town from satellite images and then determine the number roofs that are capable of going solar.  They even will report if your roof is solar possible.

If you would like to have a representation discuss all alternatives to renewable energy then Relay Power can help you.