Choosing the Right Solar Installer: A Homeowner's Guide
Your solar installer may be the most important decision in your solar journey. The equipment matters, but the quality of the installation, the accuracy of the system design, the clarity of the contract terms, and the reliability of post-installation support depend entirely on who does the work. A well-designed system from a reputable installer outperforms a premium-equipment system from an unreliable contractor.
Credentials to Look For
The North American Board of Certified Energy Practitioners (NABCEP) certification is the gold standard for solar installation professionals. A NABCEP-certified installer has demonstrated knowledge of solar system design, installation practices, and electrical codes. Check that your installer is licensed as a general contractor and electrical contractor in your state — solar installation involves both roofing and electrical work, and proper licensing protects you. Verify insurance coverage including general liability and workers' compensation; an uninsured installer leaves you potentially liable for injuries or property damage during installation.
Getting Multiple Quotes
Get at least three quotes for your installation. Quotes should be specific — detailing the exact panel model and quantity, inverter type and model, mounting hardware, warranty terms for each component, and the installer's own workmanship warranty. Quotes that are vague about equipment specifications should be treated with skepticism. Avoid choosing on price alone; a quote that is significantly below market may indicate cut-rate equipment, unlicensed subcontractors, or a company planning to go out of business before honoring its warranty commitments.
Company Longevity and References
Solar company bankruptcies are unfortunately common, leaving customers without workmanship warranty coverage when they need it most. A company that has been in business for at least five years and has a track record of completed local installations is more likely to be around to honor its commitments. Ask for references from local customers with similar-sized systems installed at least two years ago. Call those references and ask specifically about the installation experience, any issues encountered, and how the company responded to problems.
Contract Terms to Review Carefully
Read the full contract before signing. Understand what happens if the system underproduces — are there any production guarantees, and what are the remedies? Understand the workmanship warranty term and what it covers. Verify that the contract specifies the exact equipment to be installed, not just brand names with room for substitution. Understand the payment schedule — reputable installers do not require full payment before installation is complete.
Red Flags to Avoid
High-pressure sales tactics, particularly door-to-door salespeople who pressure you to sign the same day, are a warning sign. Vague or verbal representations about production guarantees that aren't in writing should make you cautious. Requests for large deposits before permits are pulled are a concern. Companies that subcontract all of the actual installation work to unnamed third parties rather than employing their own installers often have less quality control over the finished product.
For more on preparing for your solar installation, read our installation process guide and our solar financing comparison.