Complete Guide to Solar Energy in Tennessee
Your complete resource for solar energy. Everything you need to know about solar laws, solar costs, solar financing, and solar installation in Tennessee.
Why Tennessee is Excellent for Solar Energy
Reliable Solar Potential
Tennessee averages about 207 sunny days per year, giving homeowners solid rooftop solar potential across much of the state. The climate supports residential solar generation well enough to make solar a realistic long-term option in both urban and rural areas. BestPlaces
A Large Utility Territory with Local Solar Options
Tennessee is unusual because the Tennessee Valley Authority serves roughly 99.7% of the state’s electricity territory. That means many homeowners need to evaluate solar based on their local power company’s rules, export program, and TVA-related requirements rather than relying on one simple statewide net metering structure. Tennessee Department of Environment and Conservation
Established and Growing Solar Market
Tennessee already has [1,206 MWdc of installed solar], enough to power [121,779 homes], along with [5,266 solar jobs], [138 solar companies], and $1.7 billion in total solar investment. That gives homeowners access to a more developed market than Tennessee’s solar reputation might suggest. SEIA
Solar Access and Consumer Protection Resources
Tennessee has a long-standing Solar Access Law of 1979 that allows formal solar easements, and the state’s residential solar guidance also points homeowners to fraud-prevention resources, installer licensing rules, contract education, and local power company contacts before signing a solar deal. Tennessee Code § 66-9-204 Tennessee Department of Environment and Conservation
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Laws & Regulations
Tennessee homeowners should understand the state’s solar easement law, local permitting requirements, installer licensing rules, TVA and local power company interconnection requirements, and the state’s consumer protection resources for avoiding residential solar fraud. Tennessee Code § 66-9-204 Tennessee Department of Environment and Conservation
Residential Solar
Complete guide for Tennessee homeowners covering system sizing, roof suitability, installer selection, contract review, battery compatibility, and the importance of checking your local utility or local power company before assuming a standard export-credit structure. Tennessee Department of Environment and Conservation
Costs & Savings
As of March 2026, EnergySage puts Tennessee’s average installed solar cost at $3.21/W, with an average 18.32-year payback. The average bill-covering system is about 14.12 kW, which shows that Tennessee households often need relatively large systems compared with some neighboring states. EnergySage EnergySage
Financing Options
Tennessee homeowners typically rely on cash purchase, solar loans, leases, or PPAs where available rather than a broad statewide residential rebate. The state’s residential solar guidance encourages homeowners to compare offers carefully, understand contract terms, and use consumer-protection resources before committing. Tennessee Department of Environment and Conservation
Installation Guide
Permitting for solar in Tennessee is generally handled similarly to other forms of development, but homeowners should still confirm local code requirements, electrical permitting, contractor licensing, and utility interconnection before installation. The state also recommends checking directly with your local power company for area-specific solar options. Tennessee Department of Environment and Conservation
Solar 101
Learn how rooftop solar works, how solar contracts are structured, why system size matters, how batteries fit into the picture, and why Tennessee solar economics depend heavily on utility rules, exported-power compensation, and actual household consumption. Tennessee Department of Environment and Conservation
Community Solar
Tennessee does not operate like a simple one-policy net metering state for most residents. In Nashville, NESolar Connect and NESolar Savings pay for eligible excess electricity, and NES says exported energy is purchased using seasonal rates plus TVA fuel-cost components. In the Knoxville area, KUB’s solar FAQ explains that TVA’s Dispersed Power Production pathway generally applies to qualified facilities from 50 kW to 80 MW, so many small residential systems are evaluated differently than larger generation projects. In the small Appalachian Power service area, residential net metering is available up to 10 kW AC, with excess energy banked for future bills. Nashville Electric Service NES Guidelines KUB Appalachian Power
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Estimate your solar savings and system requirements.
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Important 2026 Updates
The Federal Residential Credit Has Ended
The IRS Form 5695 instructions say homeowners cannot claim the residential clean energy credit for expenditures made after December 31, 2025. That makes installer pricing, financing, and utility export terms more important in Tennessee solar economics going forward.
Tennessee Solar for All Funding Is Not Available
Tennessee’s official Solar for All page says the EPA terminated the assistance agreement and that Tennessee will not administer an EPA-funded Solar for All program. The state also warns residents to watch for scams claiming to offer free equipment or upgrades under that program.
Tennessee Solar Laws & Regulations
For most homeowners, Tennessee’s most relevant legal protection is the state’s solar easement framework. Under Tennessee Code § 66-9-204, a solar easement instrument can define the benefiting and burdened property, the angles protected, duration, termination conditions, and compensation terms. That gives neighbors and landowners a formal way to protect solar access.
Tennessee’s official solar guidance says the state has one direct statewide law focused on solar development at larger scale: the decommissioning law for solar power facilities, which now applies to certain projects 5 MW and larger as of July 1, 2024. That is more relevant to utility-scale development than ordinary rooftop homeowners, but it shows that Tennessee’s solar regulation is still heavily shaped by project size and local oversight.
For residential systems, the most important practical rule is that utility treatment varies by territory. Most Tennessee residents are in TVA-served territory and need to check their local power company’s interconnection and export terms directly. Nashville Electric Service offers NESolar Connect and NESolar Savings, while Appalachian Power’s Tennessee net metering package allows residential systems up to 10 kW AC. Tennessee’s residential solar guidance also strongly emphasizes fraud prevention, installer vetting, and contract review before purchase.
Nashville Electric Service Appalachian Power Tennessee Department of Environment and Conservation