Licenses (Mandatory):

‍Contractor's License for Larger Projects ($25,000+): In Tennessee, a contractor's license from the Department of Commerce and Insurance (TNDCI) is mandatory if your solar project's value reaches $25,000 or more (including materials and labor). This applies to both prime contractors (directly bidding with the homeowner) and subcontractors.

Types of Contractor Licenses to Consider:

‍Several contractor licenses might be relevant for solar installations, depending on the project's specific aspects:

• Electrical Work (Statewide): Since most solar projects involve electrical work, this license is crucial for ensuring qualified electricians handle these elements.
• Building Construction: For projects involving modifications to the building structure to accommodate solar panels (e.g., roof attachments), this license might be required.

Electrical Contractor License Details:

‍The TNDCI issues electrical contractor licenses. Here's some vital information:

• License Classifications: The TNDCI offers various electrical contractor licenses, but for solar work, focus on the following:
  • Master Electrician License: This comprehensive license allows for all electrical work, encompassing solar installations.
• Licensing Requirements: Obtaining an electrical contractor license involves passing written examinations (Law & Business and a trade exam), demonstrating relevant work experience, and meeting insurance requirements. 

Projects Under $25,000

‍For smaller solar projects valued under $25,000, a contractor's license might not be mandatory. However, it's still highly recommended that a licensed electrician oversee the electrical work for safety and adherence to regulations.

Additional Considerations:

• NABCEP Certification: While not mandated by the state, obtaining a NABCEP PV Installation Professional certification demonstrates your expertise and can enhance your reputation in the solar industry.
• Local Permits: A separate electrical permit from your local jurisdiction is usually required for solar installations. 

This information has been referenced from the following site.