Solar Panels in Knoxville, Tennessee - Costs, Installation & Rebates

Reviewed October 2026 · How we research our guides

Solar Panel Installation in Knoxville

Knoxville, Tennessee presents excellent opportunities for solar panel installation, with its Hot-Humid climate providing abundant sunshine throughout the year. The city's 190,740 residents can benefit significantly from solar energy, especially given the current electricity rate of 10.8¢/kWh through Knoxville Utilities Board (KUB). This rate is notably higher than the national average, making solar panels an increasingly attractive investment for homeowners looking to reduce their monthly energy costs and achieve long-term savings.

The Hot-Humid climate of Knoxville means residents experience high cooling costs during summer months, often leading to elevated electricity bills when KUB usage peaks. Solar panels can offset these high energy demands by generating clean electricity during the sunniest parts of the day when air conditioning usage is typically highest. With proper installation and system sizing, many Knoxville homeowners can significantly reduce or even eliminate their monthly KUB bills, while contributing to Tennessee's growing renewable energy portfolio.

Solar Panel Costs in Knoxville

Solar Incentives in Knoxville

Knoxville residents may still find solar incentives that make installation more affordable. The federal solar tax credit ended for systems installed after December 31, 2025, so incentives now come from Tennessee and local utility programs. Tennessee doesn't currently offer state-level solar rebates, but the state does not tax solar equipment purchases, providing additional savings. KUB participates in net metering programs, allowing solar customers to receive credit for excess electricity generated by their systems and fed back into the grid. Additionally, solar panel systems in Knox County may qualify for property tax exemptions, meaning the added home value from solar installation won't increase property tax assessments, making the long-term investment even more attractive for homeowners.

Best Solar Companies in Knoxville

When selecting a solar installer in Knoxville, homeowners should prioritize companies with proper Tennessee electrical contractor licensing and specific solar installation experience in the Hot-Humid climate conditions of East Tennessee. Look for installers who are certified by the North American Board of Certified Energy Practitioners (NABCEP) and have extensive experience working with KUB's interconnection requirements and net metering processes. Quality installers should offer comprehensive warranties, typically 10-25 years on equipment and workmanship, and provide detailed proposals showing expected energy production based on Knoxville's specific solar irradiance levels. The best solar companies will conduct thorough site assessments, considering factors like roof condition, shading, and orientation, while providing transparent pricing and realistic expectations for energy production and savings based on KUB's current 10.8¢/kWh rate structure.

Solar ROI in Knoxville

The return on investment for solar panels in Knoxville is best analyzed over the system's 25-year lifespan. With KUB's electricity rate of 10.8¢/kWh, a typical 6kW solar system can generate approximately $778 in annual savings, resulting in a payback period of about 23 years. Over the full 25-year warranty period, total savings could reach up to $19,450, though results depend on usage and future rates. These calculations assume modest annual electricity rate increases of 2-3%, which historically have occurred with KUB. The Hot-Humid climate of Knoxville provides consistent solar production throughout the year, with peak generation during summer months when cooling costs and KUB bills are typically highest, maximizing the value of solar-generated electricity.

Frequently Asked Questions