Solar in Wilmington starts on a roof above the fall line or down toward the rivers, and those are different skies. Hill houses lose sun to large trees and to the slope itself. Houses on the lower streets may have a clearer southern pitch or may sit in the shade of the next brick block. The covering under any array has to be sound. Say whether the roof is slate, shingle, or a low rear addition before you talk about panels.
Shade here is trees on the Piedmont edge and buildings in the older grid. Chimneys and dormers break the clear area on the tall brick houses. A north slope toward the Brandywine can look generous and still be a weak site. Describe what you can see from the street and from the garden, and say whether leaves cover the roof well into autumn. An aerial picture will not show a soft valley under an oak.
Do not set an array on a roof that leaks or that is due for a new covering. Attachments have to handle ice on the hills and long damp spells near the rivers. If you do not know the age, describe the surface and any stains below it. Slate is not a surface to treat casually. Metal flashings and boots deserve a straight report. The deck comes before the rack.
Panels and inverters still need a path to an electrical cabinet that, in these houses, is often old and in the basement. A long run through a finished stair changes the work. Interconnection has to be accepted before the system operates. Mention a crowded panel if the lights already tell you the service is tired. Keep the call on roof, shade, and that path.
Bring the hillside or the river flat, the direction of the roof, and the trees or buildings that shade it. Solar in Wilmington is a fall-line site question, not a beach sky and not a mountain ridge. Call the number on this page.