Solar Panel Cost in Portland, OR 2026: ~14.5-Year Payback
In Portland, OR, an 8 kW system at $2.47/W produces about 1,083 kWh per kW and pays back in roughly 14.5 years at 18.19¢/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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- Portland production
- 1,083 kWh/kW/yr
- Oregon average
- 1,075 kWh/kW/yr
- Electricity rate
- 16.0¢/kWh
- 8 kW installed cost
- ~$19,760
- 2026 federal credit
- $0
- Payback (utility math)
- 14.5 years
Why this number
A kilowatt of panels in Portland produces about 1,083 kWh a year, the lowest of the 4 Oregon cities modeled here — behind Bend at 1,418, Medford at 1,316, Eugene at 1,156. That is a payback of roughly 16.3 years against 11.8 years in Bend, with the same electricity rate, the same export rule and the same installed price. The difference is entirely the sky.
What sets Portland apart
The reference point for Oregon and one of the lowest figures in the dataset — the wet side of the Cascades in a maritime climate.
Your utility, officially
Oregon’s average residential rate is 16.0¢/kWh, but the bill in Portland comes from Portland General Electric Co at 18.19¢ — 14% above the state figure. These are the residential figures Portland’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) |
|---|---|---|---|---|
| Portland General Electric Co | 15248 | 18.19¢/kWh | 828,857 | not reported |
How exports are treated matters as much as the headline price: Portland General Electric Co is modeled here under the state’s full-retail net metering rules, and that treatment is baked into every payback figure on this page.
Most Portland homes are billed by Portland General Electric, an investor-owned utility with 828,857 residential customers and a 2024 average residential price of 18.19¢/kWh in the EIA-861 file — a couple of cents above the Oregon average this page models with, which is worth noticing because the gap works in solar’s favor. Every kilowatt-hour your array keeps off a PGE bill is worth more than the statewide math assumes.
“Most” is doing real work in that first sentence. The Portland metro is split territory: parts of the city and its east-side suburbs are served by Pacific Power instead, and the two companies run different tariffs under the same state rules. Nothing about your address’s solar economics is settled until you have looked at whose name is on the bill. Everything in this note is about PGE; Pacific Power customers share the state regime but not the rate.
Because PGE is investor-owned and PUC-regulated, the Oregon rules described on this page apply directly: net metering under OAR 860-039-0055 with exports credited at the retail rate, the arrangement our payback model assumes. PGE maintains its own net-metering program page (portlandgeneral.com ) covering interconnection and how generation credits appear on the bill. One caution we flagged at the state level applies here with full force: we could not confirm from primary sources how year-end credit balances are treated, and that detail decides whether oversizing a system is a rounding error or a donation. Ask PGE, in writing, what happens to a credit balance at the annual true-up before you let anyone size your array above your consumption.
PGE’s residential rates are not one number — the utility offers time-of-use and peak-pricing options alongside the basic schedule, and which one you are on changes what an exported afternoon kilowatt-hour offsets. If a quote models your savings without naming your rate schedule, it is modeling someone else’s house.
One structural absence in the federal data is worth recording: the 2024 EIA net-metering file we draw from carries no residential net-metering figures for PGE, so unlike our New York and Washington city pages we cannot tell you how many of your neighbors have already connected, or how big their systems run. The program exists — the utility’s own page confirms that much — but the adoption picture in Oregon’s largest city is, for now, a number the public dataset does not hold.
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.
Oregon is not one solar market
Across the 4 Oregon cities with their own modeled figures, production spans 31% — Portland at 1,083 kWh per kW to Bend at 1,418. Every column except production is identical down this table: same 16.0¢/kWh retail rate, same export regime, same $2.47/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 |
|---|---|---|---|---|
| Bend | 1,418 | 10,210 kWh | $1,630 | 11.8 yrs |
| Medford | 1,316 | 9,475 kWh | $1,513 | 12.7 yrs |
| Eugene | 1,156 | 8,323 kWh | $1,329 | 15.4 yrs |
| Portland (this page) | 1,083 | 7,798 kWh | $1,245 | 16.3 yrs |
| Oregon state average | 1,075 | 7,740 kWh | $1,236 | 16.4 yrs |
Against the state figure, Portland runs 0.7% above Oregon’s 1,075 kWh per kW — a payback 1.9 years shorter than the statewide 16.4-year estimate on the same hardware at the same price.
An 8 kW system in Portland, priced out
| Metric | Estimate for Portland | Oregon statewide |
|---|---|---|
| Production, unshaded 20° south | 1,083 kWh per kW/yr | 1,075 kWh per kW/yr |
| 8 kW output after a 10% roof derate | ~7,798 kWh/yr | ~7,740 kWh/yr |
| Average residential rate | 16.0¢/kWh (EIA) | 16.0¢/kWh |
| Installed cost, 8 kW | ~$19,760 at $2.47/watt | ~$19,760 |
| 2026 federal credit | $0 | $0 |
| Export rule | Full-retail net metering | Full-retail net metering |
| Export credit modeled | retail (16.0¢/kWh) | retail (16.0¢/kWh) |
| Annual value of that output | ~$1,245 | ~$1,236 |
| Rough payback (your utility) | 14.5 years | 16.4 years (state-average model) |
| 25-year net position | $14,313 | — |
Only the first two rows differ. Everything financial — rate, tariff, price per watt — is inherited from Oregon 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 Portland array would produce, with rates rising at 2.5% a year, comes to roughly $42,526.
Electricity isn’t only for panels — the heat pump vs. furnace cost calculator compares heating costs at Portland’s own 16.0¢/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.
Portland against the rest of Oregon
Same rate, same export rule, same installed price per watt — only the sunshine changes:
| City | kWh per kW | Payback |
|---|---|---|
| Bend | 1,418 | 11.8 years |
| Medford | 1,316 | 12.7 years |
| Eugene | 1,156 | 15.4 years |
| Portland | 1,083 | 16.3 years |
A 31% production span across one state is the reason a single statewide number is only ever a starting point.
What Oregon pays Portland for exported power
Oregon credits exported power at the retail rate under OAR 860-039-0055 , so a kilowatt-hour a Portland array sends to the grid is worth the same as one you buy. That is the best case for solar economics and it is why the payback above is what it is.
It is also the assumption most likely to change. Twenty-two states have already moved to net billing. If Oregon did the same on typical terms, this system would take about 26.2 years instead of 14.5 — 11.7 years’ difference from a policy change, with no change to the hardware and none to Portland’s weather.
The treatment of year-end credit balances was not confirmed.
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 1,083 kWh per kW figure for Portland is a modeled location point, not an interpolation from the Oregon 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 Oregon’s residential average; EIA does not publish a Portland figure, so the state rate is used and labeled as such.
- Export rules: OAR 860-039-0055 , from our Oregon 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 Portland in 2026?
About $19,760 for a typical 8 kW system at $2.47 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 Oregon 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 Portland?
Roughly 14.5 years on this model, using Portland’s own production figure of 1,083 kWh per kW and its own utility tariff (18.19¢/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 Portland better or worse for solar than the rest of Oregon?
Against the state figure, Portland runs 0.7% above Oregon’s 1,075 kWh per kW — a payback 1.9 years shorter than the statewide 16.4-year estimate on the same hardware at the same price.
Is solar worth it in Portland in 2026?
At 15.97¢/kWh and 1,083 kWh per kW, an 8 kW system in Portland pays back in about 16.3 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 Oregon
- Solar panel cost in Oregon — The statewide picture: Oregon’s rate, incentives, export rules and the 1,075 kWh per kW average this page corrects.
- Solar panel cost in Bend — 1,418 kWh per kW and a 11.8-year payback — better than Portland on identical hardware.
- Solar panel cost in Medford — 1,316 kWh per kW and a 12.7-year payback — better than Portland on identical hardware.
- Solar panel cost in Eugene — 1,156 kWh per kW and a 15.4-year payback — better than Portland on identical hardware.
- Solar panel cost in Seattle — 1,086 kWh per kW in Washington — the closest production match to Portland in our data.
- Solar panel cost in Syracuse — 1,114 kWh per kW in New York — the closest production match to Portland in our data.
- All city solar figures — The 66 US cities with their own modeled production data, and the spreads between them.