Yes! Shade from tall trees or neighboring buildings or objects is the number one cause of poorly performing solar systems in our area not daylight hours. Professional installers can easily calculate the amount of shade you have for a given area and determine which trees to trim in order to reduce you shading. The world leader in solar installations is Germany and they get 3.5 average sun production hours a day. Arizona, the most sunny state in the US, gets 6.5 average sun production hours a day. South Central PA gets 4.5 average sun production hours a day.