TN · Solar

Solar quotes in Johnson City, TN.

One real quote from a vetted local Johnson City installer, sized to your roof, your bill, and every federal + state rebate you qualify for.

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One vetted local Johnson City installer
Rebates checked for your exact address
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7.5 kW
Average system size: $2.80/W
Average cost (USD): 12 yrs
Average payback: 90+
Local installers

Why solar in Johnson City

East Tennessee is hill country, and that matters more to a solar quote here than in the flatter parts of the state. Ridges, hollows and mature tree cover create genuine differences in solar resource between properties a short distance apart, which means a production estimate built from a regional average is not describing your roof. In a state where incentives are thin and exports earn only avoided cost, that estimate is most of the quote.

Terrain makes the estimate a local question

Solar resource varies with more than latitude. Surrounding terrain shades low sun angles, orientation is often dictated by how a house sits on a slope, and tree cover in the hills of east Tennessee is substantial.

That means two homes in the same postcode can have meaningfully different production, and a model built on a regional or statewide irradiance figure will not distinguish between them.

Ask what data source the annual production estimate used and whether it applies location-specific irradiance for your address. Ask for the figure in kilowatt hours per year rather than only as a dollar saving.

Ask what shading analysis was performed, whether it accounted for terrain as well as trees, and what it assumed about canopy growth across the twenty-five year life of the system.

Why an overstatement costs more in Tennessee

In a state with a thick incentive stack and a retail-rate net metering tariff, an optimistic production estimate is painful but partly cushioned. Tennessee has neither cushion.

There is no state solar tax credit, the federal residential credit ended for property placed in service after December 31, 2025, retail power is cheap at around 13 cents per kWh, and exports earn only TVA avoided cost.

So the production estimate flows almost directly into the result. An overstatement of fifteen percent is not absorbed by anything; it simply becomes fifteen percent less return.

That is the argument for spending your diligence here rather than on negotiating price per watt. The cheapest quote built on an inflated estimate is not the cheapest project.

The other half of the number

Production is one input; what each kilowatt hour is worth is the other. Under Dispersed Power Production, exports are bought at TVA avoided cost while self-consumed electricity displaces your full retail rate.

Your retail rate comes from your local power company, which adds its own distribution charges to the TVA wholesale rate. Actual rates run a cent or more either side of the state average, so check a recent bill rather than accepting a generic figure.

Ask what self-consumption share the model assumed. That assumption determines how much of your production earns the retail rate rather than avoided cost, and it is the single largest lever in the savings figure.

And ask for a smaller system modelled alongside the proposal. In Tennessee a design covering 70 to 80 percent of annual consumption frequently returns better than one covering 100 percent.

Costing it out on TVA terms

The 30 percent federal Residential Clean Energy Credit under Section 25D expired for property placed in service after December 31, 2025, so a cash or loan purchase in Johnson City receives no federal tax credit, and Tennessee has no state solar tax credit.

Section 48E survives at 30 percent for third-party owners under leases and power purchase agreements, so ask what a provider claims and what reaches you in the rate.

What exists is retail value on self-consumed generation, avoided cost on exports under Dispersed Power Production, and an interconnection agreement with your local power company.

Ask for the projection built on a location-specific production estimate with terrain and canopy accounted for, your own rate from a recent bill, fixed charges included, and the self-consumption share stated on the page.

Incentives & rebates

Net metering: No net metering; TVA avoided-cost export purchase

Tennessee does not offer net metering. The Tennessee Valley Authority supplies effectively all electricity in the state through more than 150 local power companies and cooperatives, and residential solar exports are handled through TVA Dispersed Power Production, under which a customer may sell all or part of their generation to TVA at TVA avoided cost. Avoided cost is a wholesale-style measure of what the electricity would otherwise have cost TVA to supply, and it sits well below the retail rate a household pays. That produces a large gap between the two things a solar system can do with a kilowatt hour. Electricity you consume at the moment it is generated is worth the full retail rate, because you simply do not buy it. Electricity you export is worth avoided cost. Nothing accumulates as a retail-rate credit bank to draw down later. The practical consequences are that oversizing is penalised, that a system covering 70 to 80 percent of annual consumption frequently returns better than one covering 100 percent, and that shifting flexible loads into daylight hours is one of the few free improvements available. An interconnection agreement with your local power company is required, and because each of those 150-plus companies administers its own process and adds its own distribution charges, the specifics genuinely vary by address.

Related Tennessee resources

Tennessee solar incentives & rebates Full breakdown of federal, provincial, and utility programs.

How payback works in Tennessee

System cost: $21,000
Estimated net cost: $21,000
Estimated payback: ~13.0 years
25-year net savings: ~$19,500

These figures are illustrative; your actual quote reflects your roof, sun exposure, and local utility rates.

Frequently asked questions

Does east Tennessee terrain affect solar production?

Meaningfully. Ridges, hollows and mature tree cover create real differences between properties a short distance apart, so a production estimate built on a regional or statewide average is not describing your specific roof.

What should the shading analysis cover?

Terrain as well as trees, and what it assumed about canopy growth over the twenty-five year life of the system. A wooded lot modelled on today canopy will underdeliver in ten years.

Why does the production estimate matter so much here?

Because nothing cushions an overstatement. No state credit, no federal residential credit since the end of 2025, cheap retail power and avoided-cost exports mean an inflated estimate flows almost directly into a worse result.

What is the largest lever in the savings figure?

The assumed self-consumption share, since it determines how much production earns the retail rate rather than TVA avoided cost. Ask what it is, what it was based on, and to see the projection at a lower share.