Discover your exact solar savings potential in Tennessee. We factor in local utility rates, sun hours, and state-specific incentives to give you an accurate ROI estimate.
DISCLAIMER: All estimates are approximations based on regional averages. Actual savings vary by location, roof orientation, utility provider, and installer. This calculator does not guarantee specific savings.
Electricity rates last updated: August 2026 (source: EIA)
Find out how much you can save based on your location and current energy usage.
Tennessee does not have a state net metering law — this is one of the most important facts for any Tennessee homeowner researching solar. Nearly the entire state is served by the Tennessee Valley Authority (TVA), a federal utility, through roughly 153 local power companies (LPCs) such as Nashville Electric Service, Memphis Light, Gas and Water, and Knoxville Utilities Board. This single-federal-utility structure is unique among U.S. states; no state net metering mandate applies to TVA-served customers because TVA is a federal entity, not subject to state utility regulation. TVA's old Green Power Providers (GPP) program did offer 1:1 net metering credits but closed to new enrollment in 2019. The current pathway for new solar customers is TVA's Dispersed Power Production (DPP) program, which pays for excess solar generation at avoided-cost rates — typically lower than the retail electricity rate, not full retail credit. Homeowners should contact their specific local power company to confirm current DPP terms, since program details and rate structures can vary. Do not assume TVA's DPP program offers the same economics as net metering states.
Under Tennessee Code Annotated § 67-5-601 (the Green Energy Property Tax Assessment), the assessed value of solar property for property tax purposes cannot initially exceed 12.5% of the total installed cost of the system. In practice, this means a homeowner who installs a $20,000 solar system pays property tax on at most $2,500 of assessed value attributable to solar — a small fraction of what the system actually adds to the home's market value. This protection is applied automatically by local assessors in most Tennessee counties; no separate application or filing is generally required. This incentive directly addresses the concern many homeowners have about solar increasing their property tax bill — in Tennessee, that increase is substantially capped by statute.
Tennessee does NOT offer a sales tax exemption for residential solar equipment — homeowners pay full state and local combined sales tax on their solar system purchase. It is worth noting that Tennessee does offer a 100% sales tax exemption, but that exemption applies only to commercial and industrial solar installations, not to homeowners. This distinction is a common source of confusion: if you read that Tennessee has a solar sales tax exemption, that exemption does not apply to your residential system. Budget for Tennessee's combined state and local sales tax on your equipment costs as part of your total installed price.
Tennessee does not levy a broad state income tax on wages. This is a structural fact about Tennessee's tax system, not a solar-specific limitation: since there is no personal income tax on wages, there is no mechanism for a state solar income tax credit. Homeowners should not expect any state income tax credit for solar — it does not exist under the current Tennessee tax structure. The absence of a state income tax credit is a factual feature of Tennessee's fiscal structure.
Tennessee averages roughly 4.4 to 4.5 peak sun hours per day statewide, approximately in line with the U.S. national average. There is meaningful geographic and seasonal variation: Nashville runs somewhat higher, averaging around 5.4 peak sun hours per year on an annual basis, but with dramatic seasonal swings — approximately 2.4 peak sun hours per day in December and up to 8.3 in June. Systems in eastern Tennessee and the Cumberland Plateau region may see slightly different resource profiles. More peak sun hours per day means more electricity generated per installed kilowatt of panel capacity. Use location-specific solar production data for your ZIP code, not a statewide average, when evaluating installer quotes and projected savings.
Tennessee's average residential electricity rate is roughly 12 to 15¢/kWh depending on the source and time period — approximately 20% below the national average. Lower electricity rates mean each kWh your solar panels generate offsets fewer dollars compared with higher-rate states, which extends the payback period relative to states like Massachusetts or California. Given that TVA's DPP program pays avoided-cost rates for excess solar generation (rather than full retail-rate credits), the economics of oversizing a Tennessee solar system to export surplus power are less favorable than in traditional net metering states. Right-sizing your system for your actual household consumption — rather than maximizing panel count — is generally the more financially sound approach for Tennessee homeowners.
The 30% federal residential solar tax credit (Section 25D) expired December 31, 2025 under the One Big Beautiful Bill Act and does NOT apply to solar energy systems installed in 2026 or later. Some outdated sources and installer websites incorrectly claim this credit runs through 2033 — that is wrong for residential systems installed in 2026 or later. Any quote showing a large federal tax credit line item for a new 2026 Tennessee installation without clearly noting the expiration requires immediate clarification. For Tennessee homeowners in 2026, the primary available incentive is the property tax assessment cap under T.C.A. § 67-5-601.
Everything you need to know about solar incentives, costs, and savings in your area.