Solar in New Hampshire starts with snow, shade, and a roof that may already be at the end of its life. Mountain houses carry load and then shed it. A smooth surface sends that snow onto whatever is below, and any mount has to live with the slide and the uplift on an open ridge. Seacoast hardware has to live with salt. Lakes lots are often shaded by pine on the south side, which is the side you wanted. Say the region first.
A soft deck or a second layer of shingles is a reason to redo the roof before anything is fastened down. Slate in a village is not a casual drilling job. Steep pitches change how the work is done and how snow behaves. Shade from a ridge, a barn, or a tree you will not cut can wipe out the useful part of the day. That is a siting fact. It is not a forecast of output, and nobody should dress it up as one.
Older services are often small, full, or located in a shed the weather reaches. A camp panel and a village house panel are not the same starting point. Long driveways and steep access change the job. Ask about structure, about how mounts are flashed, and about what happens when a later leak shows up at a fastener in January. A roof near replacement should be replaced first.
Metal roofs are common up north and need a fastening approach that does not turn the snow retention into a surprise. Say if you already have snow guards, and where people walk. Historic village streets may care what the roof looks like from the common. Mention trees, chimneys, and dormers that break the slope into small pieces.
Call with the town, the roof material, the direction it faces, and what shades it. Mention snow slide, salt air, or a steep pitch if those are yours. Ask how the equipment stays on in wind. Do not expect a production promise. Call the number on this page.