Solar in Connecticut starts with the roof you already have. Slate, two layers of asphalt, or a soft deck over a colonial is a reason to stop and fix the roof before anything is fastened to it. Shade from mature maples is the other early test, on village lots and in older suburbs alike. Sound wind and inland snow load are not the same attachment problem. Say the material and the direction the slope faces.
A chimney, a dormer, and a large oak can break a sunny morning into a short window of light. That is a siting fact, not a forecast of output. Hardware near the Sound has to live with salt air. Houses inland need a plan for snow that slides off a smooth surface onto a porch or a walk. Low-slope additions and flat porch roofs are a different layout from a simple gable.
Older electrical services are often full. A panel with no space, a meter buried behind a later mudroom, and old wiring still live in the attic all change the path. Historic streets and town centers can care what is visible from the road. A slate roof is not a place to drill casually. Ask about structure and about how the roof would be repaired at each mount if it leaks later.
Access on a tight Fairfield or New Haven lot may mean no driveway and a ladder over a finished garden. Say so. Shade you will not cut, because the tree belongs to the street or the neighbor, belongs in the first call. So does a roof that still needs replacement. Mounting on a tired roof only makes the tear-off harder and the leak path stranger.
Call with the town, the roof, and what shades it. Mention slate, salt air, or a finished attic if those are part of the house. Ask how the equipment is held down in wind. Do not expect anyone to promise what the array will produce. Call the number on this page.