Start with sunlight and shade.
Trees, nearby buildings, and parts of the roof can shade an array. Orientation and roof pitch also affect production. Ask an installer to explain the proposed panel placement and how shade is reflected in the output estimate.
ENERGY STAR recommends beginning with a home assessment that considers the roof and surrounding shade. Its rooftop solar guidance is a useful starting point.
Observe from the ground.
Note which parts of the roof appear shaded at different times. Share your observations with the provider, but leave roof access and structural inspection to a qualified professional.
Consider the roof’s remaining life.
If your roof needs replacement soon, discuss the timing before adding panels. Removing and reinstalling an array may involve separate costs and responsibilities. Ask who will evaluate the roofing material, condition, and structural suitability.
The Department of Energy’s Homeowner’s Guide to Solar identifies roof condition and shade as important factors when assessing a property.
Usable space matters more than total size.
Ask for a layout that shows the proposed panels, existing roof features, and required clearances. A large roof can still have limits. The layout and production estimate together tell you more than a promise to fit a particular number of panels.
What to prepare for your first conversation.
- Your ZIP code and electric utility’s name.
- Recent electricity bills, preferably covering a full year.
- The approximate age of the roof and any known repairs.
- Information about shade, roof leaks, or planned renovations.
- Expected changes in electricity use, such as adding an electric vehicle.
Use what you already have. Missing paperwork should become a follow-up question, not a reason to guess. A provider can tell you what information is necessary for a site assessment.
A matching request is only the beginning.
Entering a ZIP code does not establish roof suitability or confirm installation eligibility. Those decisions require a home-specific assessment. Our matching process helps you begin that conversation.
Once you receive proposals, use the solar quote comparison checklist to compare the roof assumptions, installation scope, and service responsibilities.