Solar Panel Cost in Tucson, AZ 2026: ~16.4-Year Payback
In Tucson, AZ, an 8 kW system at $2.21/W produces about 1,711 kWh per kW and pays back in roughly 16.4 years at 15.63¢/kWh with the federal credit at $0.
· Source: EIA Electric Power Monthly Table 5.6.A (July 2026 data) · next EIA update ~Oct 23
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- Tucson production
- 1,711 kWh/kW/yr
- Arizona average
- 1,685 kWh/kW/yr
- Electricity rate
- 15.4¢/kWh
- 8 kW installed cost
- ~$17,680
- 2026 federal credit
- $0
- Payback (utility math)
- 16.4 years
Why this number
A kilowatt of panels in Tucson produces about 1,711 kWh a year, the highest of the 3 Arizona cities modeled here — ahead of Phoenix at 1,688, Flagstaff at 1,661. On an 8 kW system that is a payback of about 16.7 years, against 17.1 years in Flagstaff, on identical hardware at the same 15.38¢/kWh.
Tucson against the rest of Arizona
Across the 3 Arizona cities with their own modeled figures, production spans 3.0% — Flagstaff at 1,661 kWh per kW to Tucson at 1,711. Every column except production is identical down this table: same 15.4¢/kWh retail rate, same export regime, same $2.21/W installed cost. The payback differences are caused by weather and nothing else.
| Location | kWh per kW per year | 8 kW output | Annual value | Payback |
|---|---|---|---|---|
| Tucson (this page) | 1,711 | 12,319 kWh | $1,099 | 16.7 yrs |
| Phoenix | 1,688 | 12,154 kWh | $1,084 | 16.9 yrs |
| Flagstaff | 1,661 | 11,959 kWh | $1,067 | 17.1 yrs |
| Arizona state average | 1,685 | 12,132 kWh | $1,082 | 16.9 yrs |
Against the state figure, Tucson runs 1.5% above Arizona’s 1,685 kWh per kW — a payback 0.5 years shorter than the statewide 16.9-year estimate on the same hardware at the same price.
What sets Tucson apart
Slightly ahead of Phoenix, which is unusual — Tucson sits higher and drier, and the summer monsoon that clips Phoenix arrives a little weaker here.
Your utility, officially
Arizona’s average residential rate is 15.4¢/kWh, but the bill in Tucson comes from Tucson Electric Power Co at 15.63¢ — 1.6% above the state figure. These are the residential figures Tucson’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:
| Utility | EIA ID | Residential avg price | Residential customers | Net-metering (residential, self-reported) |
|---|---|---|---|---|
| Tucson Electric Power Co | 24211 | 15.63¢/kWh | 412,747 | 51299 customers / 347.832 MW |
How exports are treated matters as much as the headline price: Tucson Electric Power Co is modeled here under the state’s net billing rules, and that treatment is baked into every payback figure on this page.
If an EV is in the picture, note that Arizona’s major utilities run the time-of-use tariffs our EV + TOU whole-home calculator ships presets for — worth running before sizing an array, because overnight charging is load daytime solar cannot touch. (And if the EV itself is still hypothetical, check where the EV tax credit stands in 2026 first.)
Tucson Electric Power bills essentially every home in the city — 412,747 residential customers at an average of 15.63¢/kWh in the 2024 EIA-861 file. TEP is investor-owned, which in Arizona means one specific thing for solar: the Arizona Corporation Commission regulates it, so the state’s Resource Comparison Proxy (RCP) regime governs what your exported power is worth. Exports are credited below retail, and the credit steps down on an annual cycle each October 1 — the date matters, because a system interconnected before the reset locks a better number than one interconnected after it. We do not print TEP’s current export figure here because we could not confirm it from a primary source; confirm the live rate on TEP’s own site before you run payback math.
The number that actually jumps out of the federal data is adoption. TEP reported 51,299 residential net-metering customers to EIA for 2024 — one in every eight homes it serves, backed by 347.832 MW of capacity, which works out to a typical system just under 7 kW. For an investor-owned utility under a below-retail export regime, that is a strikingly high penetration rate. It tells you two things. First, the economics clear anyway: 15.63¢ retail power and Sonoran Desert production are enough. Second, you will not be a pioneer here — TEP’s interconnection queue, metering swap process, and plan-switch paperwork are well-worn paths, which in practice means fewer surprises than solar customers face in cities where the utility handles a few hundred applications a year.
On rate structure, be careful with generalizations: TEP’s residential lineup spans multiple designs, including time-of-use and demand-based options, and which plan a solar home lands on materially changes the value of self-consumption. The structure varies enough by plan that you should read the current tariff sheets on TEP’s site rather than trust any summary, ours included.
One local contrast worth holding onto: unlike Phoenix, Tucson has no utility boundary running through the metro. There is no public-power alternative with board-set solar rules on the other side of town — TEP’s tariff and the ACC’s export regime are simply the deal, for everyone. That makes Tucson solar math cleaner to reason about than Phoenix’s, but it also means a single October rate-step decision in a Phoenix hearing room moves the value of every future rooftop in this city at once.
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.
An 8 kW system in Tucson, priced out
| Metric | Estimate for Tucson | Arizona statewide |
|---|---|---|
| Production, unshaded 20° south | 1,711 kWh per kW/yr | 1,685 kWh per kW/yr |
| 8 kW output after a 10% roof derate | ~12,319 kWh/yr | ~12,132 kWh/yr |
| Average residential rate | 15.4¢/kWh (EIA) | 15.4¢/kWh |
| Installed cost, 8 kW | ~$17,680 at $2.21/watt | ~$17,680 |
| 2026 federal credit | $0 | $0 |
| Export rule | Net billing — exports credited below retail | Net billing — exports credited below retail |
| Export credit modeled | 4.61¢/kWh | 4.61¢/kWh |
| Annual value of that output | ~$1,099 | ~$1,082 |
| Rough payback (your utility) | 16.4 years | 16.9 years (state-average model) |
| 25-year net position | $11,713 | — |
Only the first two rows differ. Everything financial — rate, tariff, price per watt — is inherited from Arizona 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 Tucson array would produce, with rates rising at 2.5% a year, comes to roughly $64,729.
Electricity isn’t only for panels — the heat pump vs. furnace cost calculator compares heating costs at Tucson’s own 15.4¢/kWh rate.
Run it with your own bill
Shared methodology · identical on every city page
- Production figures are unshaded, south-facing, 20° PVGIS values. A real roof — its own pitch, orientation, a tree or a chimney — typically produces 10–25% less; every payback here already carries a 10% real-roof derate.
- Paybacks include $150/yr of running costs and one $2,000 inverter replacement in year 14, which is why they run longer than paybacks quoted elsewhere.
- State export rules cover investor-owned, state-regulated utilities. Municipal utilities and rural electric cooperatives are exempt in most states and set their own terms.
- Installed cost is the state-level EnergySage market figure, not a city quote; a swing of 50¢/W moves payback by roughly a year and a half either way. Get three quotes before trusting any payback — including ours.
Tucson against the rest of Arizona
Same rate, same export rule, same installed price per watt — only the sunshine changes:
| City | kWh per kW | Payback |
|---|---|---|
| Tucson | 1,711 | 16.7 years |
| Phoenix | 1,688 | 16.9 years |
| Flagstaff | 1,661 | 17.1 years |
A 3.0% production span across one state is the reason a single statewide number is only ever a starting point.
What Arizona pays Tucson for exported power
Arizona does not credit exports at the retail rate, and that rule reaches Tucson unchanged. The program is Resource Comparison Proxy (RCP) , in force since 2016, crediting surplus power at an assumed 4.6¢/kWh, about 30% of retail, because no per-kWh figure is published against a retail rate of 15.4¢.
Because a typical home uses only about 40% of its generation as it is produced, most of what a Tucson array makes is sold at that lower rate. That is why the payback above is 16.4 years and not the 9.3 years the same hardware would return under full-retail net metering. Raising self-consumption is the lever that closes the gap.
RCP steps down on an annual cycle each 1 October. APS’s own rate was not confirmed from a primary source.
Sources and method
- Production: modeled with PVGIS v5.2 PVcalc (European Commission JRC) using the PVGIS-NSRDB radiation database — the same NREL satellite dataset PVWatts draws on for the Americas. Assumptions: 4 kWp, standard c-Si, 14% system loss, roof mounting, 20-degree tilt, due south, horizon shading on. The 1,711 kWh per kW figure for Tucson is a modeled location point, not an interpolation from the Arizona average. PVGIS is free to use with JRC attribution requested; the underlying NSRDB is public domain (NREL/DOE).
- Real-roof derate: a separate 10% deduction for azimuth, pitch and shading, applied in the shared model rather than folded into the production data — so you can adjust it if your roof is genuinely unobstructed.
- Electricity rate: U.S. Energy Information Administration, average price by state . This is Arizona’s residential average; EIA does not publish a Tucson figure, so the state rate is used and labeled as such.
- Export rules: Resource Comparison Proxy (RCP) , from our Arizona state page and the shared export-rules dataset behind it.
- State average rate: EIA Table 5.6.A, July 2026 data (released Sep 2026), used for every state-average comparison on this page.
- Payback model: shared with the solar savings calculator and the state pages — 2.5%/yr utility inflation, 0.5%/yr degradation, $150/yr running costs, one $2,000 inverter replacement in year 14, federal credit $0. The rest of the toolset — battery, sizing, financing — is under all calculators .
- Incentives: DSIRE . City and utility programs change more often than state ones — check yours directly.
Electricity rate, export regime, production figure and installed cost on this page were last verified on 30 August 2026. Export credits reset on annual tariff cycles and incentive budgets run out mid-year, so treat every figure as a snapshot at that date and confirm current terms before acting. Nothing here is tax or financial advice.
Frequently asked questions
How much do solar panels cost in Tucson in 2026?
About $17,680 for a typical 8 kW system at $2.21 per watt, before any incentive. With the federal credit at $0 in 2026 that is close to your net cost. Note that the price per watt is a Arizona market average — there is no reliable city-level cost data, so treat it as a starting point and get three quotes.
What is the solar payback in Tucson?
Roughly 16.4 years on this model, using Tucson’s own production figure of 1,711 kWh per kW and its own utility tariff (15.63¢/kWh) with each utility’s real export treatment. That includes $150 a year of running costs and one inverter replacement, which many published paybacks leave out.
Is Tucson better or worse for solar than the rest of Arizona?
Against the state figure, Tucson runs 1.5% above Arizona’s 1,685 kWh per kW — a payback 0.5 years shorter than the statewide 16.9-year estimate on the same hardware at the same price.
Is solar worth it in Tucson in 2026?
At 15.38¢/kWh and 1,711 kWh per kW, an 8 kW system in Tucson pays back in about 16.7 years on this model. Treat that as a starting point for reading real quotes rather than as a quote: your roof’s orientation, its shading and the price you are actually offered will move it more than your city does.
How we calculated this
Year-1 saving = production (kW × the city’s modeled kWh per kW) × the blended kWh value (retail rate for self-use, the state export rule for exports). Payback = net cost ÷ year-1 saving, with the federal credit at $0 for 2026 purchases and cost per watt from the state’s installed-price band. Production is modeled from PVGIS/NSRDB irradiance for the city.Sources: U.S. Energy Information Administration (EIA) electricity rates · DSIRE incentive records · public IRS/OBBBA guidance. Figures are modeled estimates, not quotes or tax advice. See our methodology.
Compare with the rest of Arizona
- Solar panel cost in Arizona — The statewide picture: Arizona’s rate, incentives, export rules and the 1,685 kWh per kW average this page corrects.
- Solar panel cost in Phoenix — 1,688 kWh per kW and a 16.9-year payback — worse than Tucson on identical hardware.
- Solar panel cost in Flagstaff — 1,661 kWh per kW and a 17.1-year payback — worse than Tucson on identical hardware.
- Solar panel cost in Las Vegas — 1,689 kWh per kW in Nevada — the closest production match to Tucson in our data.
- Solar panel cost in Lubbock — 1,682 kWh per kW in Texas — the closest production match to Tucson in our data.
- All city solar figures — The 66 US cities with their own modeled production data, and the spreads between them.