Your roof needs to have good southern exposure. Due south is considered 180 degrees, and thus your roof should be pointing somewhere between 40 degrees in either direction. Your roof needs to have minimal shading. Do other trees or buildings cast a shadow on your roof? This will impact your panels efficiency. Your roof needs to have enough space to fit the array. We can work around most obstacles such as windows, chimneys, or other exhaust exits, but space is definitely a factor to consider.
