Shading and orientation: The amount of shading along with the orientation within your roof toward the sun can affect the effectiveness of the solar panels. If your roof is partially shaded, you may have to have to take a position in micro-inverters or power optimizers to take care of performance, https://www.evernote.com/shard/s650/sh/c09fef99-e12d-691b-0ae0-af05e91d91ce/2cCGb5Yj7sLJtThNlYxQ1R8j_hnb7H1GOt5VxA0RLKXJvRszJ_sOGIMAPQ