Key questions to ask during a site visit
Preparing a list of questions ensures you get a clear picture of system performance, costs, warranties, and installation details. Ask installers to explain specifics and provide documentation.
Essential questions to ask:
- What system size and expected annual production do you recommend for my goals?
- How did you account for shading, roof condition, and local weather in your estimate?
- Which panels and inverter brands do you use, and what are their warranties?
- What is included in the installation price and what are potential extra costs?
- How will the system be mounted and how do you ensure roof integrity and water sealing?
- What permits, inspections, and interconnection steps are required and who handles them?
- How long will installation take, and what is the typical project timeline?
- How do you handle maintenance, performance monitoring, and service calls?
- Can you provide references or examples of recent local installations?
- What financing, rebates, or tax incentives apply and can you assist with paperwork?
Follow-up tips
- Compare multiple bids and watch for unusually low quotes that may indicate quality trade-offs.
- Request production estimates in writing and ask for system layout drawings and equipment specifications.
Asking these questions helps you compare proposals and choose an installer aligned with your priorities.