How Much Is Solar in Nashville, TN? $3.56/W, 20.8–32.7-Yr Payback

Why this number

A kilowatt of panels in Nashville produces about 1,340 kWh a year — the only Tennessee city with its own modeled figure, so the useful comparison is against the statewide 1,290 kWh per kW band rather than another city. On an 8 kW system that is a payback of about 20.5 years at 13.71¢/kWh.

What sets Nashville apart

Nashville Electric Service, a TVA distributor - export rule unverified, page shows a range.

Your utility, officially

Tennessee’s average residential rate is 13.7¢/kWh, but the bill in Nashville comes from Nashville Electric Service at 13.47¢ — 1.8% below the state figure. These are the residential figures Nashville’s utility reported to the U.S. Energy Information Administration on Form EIA-861 for 2024 — computed as revenue ÷ sales from the official file, not estimated:

One thing we could not verify with Nashville Electric Service is its export rule, which is why the payback above is a range: ask the utility directly whether you get full-retail net metering or a lower export credit , because that one answer picks your end of the range.

Nashville’s electricity comes from Nashville Electric Service, a municipal utility with 417,640 residential customers at a 2024 EIA-861 average of 13.47¢/kWh. NES does not generate that power; it distributes electricity from the Tennessee Valley Authority, and that arrangement is the key to everything unusual about this page. Tennessee has no state net-metering statute. What exists instead is TVA’s Green Connect framework, administered by the local power companies that distribute TVA power — and we could not verify the current export credit terms in a primary TVA source. On top of that, NES reported no residential net-metering customers or capacity to EIA for 2024 at all, so unlike nearly every other city we cover, we cannot tell you how many Nashville rooftops are connected or on what terms.

This page therefore shows a payback range rather than a single number, spanning the plausible band of export treatments, because the honest answer to “what is an exported kilowatt-hour worth in Nashville?” is: we could not verify it with the utility. Treat it as unknown until you have NES’s current terms in writing. That is not a formality — the export rate decides whether oversizing a system is harmless or expensive, and whether a battery is optional or essential. Get the number first, size the system second, and until then design as if only self-consumed kilowatt-hours count: each one displaces the full 13.47¢, and that floor is real regardless of how the export question resolves.

The resource itself is respectable: a modeled 1,340 kWh per kW per year from an unshaded south-facing array — comparable to Baltimore, ahead of Minneapolis, well behind the desert Southwest. At the retail rate, a fully self-consumed kilowatt of capacity displaces roughly $180 of purchased electricity a year.

The incentive picture is thin and the cost picture is not flattering. The federal §25D residential credit is $0 for cash and loan purchases in 2026 — it expired December 31, 2025 — with 30% remaining only for leases and PPAs through the §48E business credit, claimed by the system owner. Tennessee has no state solar tax credit or rebate, and its sales-tax exemption applies to businesses only; homeowners cannot claim it. Meanwhile Tennessee’s EnergySage marketplace average is $3.56/W before incentives, among the highest in the country. Expensive to build, modest retail rate, unverified export terms: Nashville is a measure-twice market. Ask NES for its current solar tariff before you sign anything.

Source: EIA Form EIA-861, 2024 final release , accessed 2026-09-02. Average price is total residential revenue divided by total residential sales for the year — your own rate depends on your tariff and usage tier.

Who else serves the metro

Nashville Electric Service bills the core of the city, but its seven-county EIA-861 territory also brings in Middle Tennessee EMC at 11.8¢, Cumberland EMC at 13.0¢, and Duck River EMC at 12.5¢ — all of them below Nashville Electric’s own 13.47¢. The largest gap, about 1.7¢ down to Middle Tennessee EMC, is enough to shift a solar payback timeline, and each EMC sets its own net-metering terms separately from Nashville Electric’s. Tennessee’s July 2026 state average, 13.71¢, is a later figure calculated differently than these 2024 numbers. A property’s ZIP code, not the Nashville address it carries, is what ultimately determines which utility serves it.

The exact answer is a ZIP question, not a city question: look up your utility by ZIP . Candidates: utilities EIA-861 lists in 7 service counties of the metro’s main utility; prices are 2024 revenue ÷ sales from the official file.

An 8 kW system in Nashville, priced out

Only the first two rows differ. Everything financial — rate, tariff, price per watt — is inherited from Tennessee without change, which is the point: a city page that quietly used a different electricity rate from its state page would be guessing, not measuring.

Doing nothing is not free either. Twenty-five years of the electricity an 8 kW Nashville array would produce, with rates rising at 2.5% a year, comes to roughly $45,191.

If a battery is part of the plan, the battery buy vs. TPO calculator prices owning one against a lease or TPO deal.

Run it with your own bill