Is solar worth it in Oregon?
A 7.0 kW rooftop system near Portland produces about 7,895 kWh a year. Priced against 17 current residential tariffs in Oregon, payback runs from 14 years on the best of them to 60 on the worst.
Why the tariff matters more than the panels
Two households in Oregon with identical roofs and identical systems can see paybacks 14 and 60 years apart, purely because they are on different tariffs. Solar produces at midday; households consume in the evening. Only 61% of what these panels make is used as it is made — the rest is exported, and what an exported kWh earns is set by the tariff and by state net metering rules, not by the hardware.
That is why the figures here are computed hour by hour against each real tariff rather than by taking a bill and assuming solar removes a share of it. How this is modeled →
Payback by tariff in Oregon
7.0 kW system at $3.00/W, household using 1000 kWh a month, no incentives. A range means the export credit is not filed with the tariff and the outcome depends on net metering rules — 17 of 17 tariffs here belong to a utility that reports residential net metering.
| Utility | Tariff | Structure | Annual saving | Payback |
|---|---|---|---|---|
| Portland General Electric Co | Residential Service (Rate 7) | Tiered | $922–$1,509 | 14–23y |
| Portland General Electric Co | Residential Service (Rate 7) | Tiered | $884–$1,446 | 15–24y |
| Idaho Power Co | Schedule 3 - Master-Metered Mobile Home | Flat | $847–$1,386 | 15–25y |
| Portland General Electric Co | Residential Time-Of-Use Service (Rate 7-TOU of EV) | Time-of-use + tiered | $667–$1,383 | 15–31y |
| Idaho Power Co | Schedule 1 - Residential Service | Time-of-use + tiered | $806–$1,293 | 16–26y |
| Idaho Power Co | Schedule 5 - Residential Time-of-Day | Time-of-use | $666–$1,234 | 17–32y |
| Portland General Electric Co | Residential Service (Rate 7) | Tiered | $752–$1,229 | 17–28y |
| Portland General Electric Co | Residential Time-Of-Use Service (Rate 7- TOU or EV) | Time-of-use + tiered | $557–$1,133 | 19–38y |
| PacifiCorp (Oregon) | Schedule 4T - Residential Time of Use | Time-of-use | $585–$1,127 | 19–36y |
| PacifiCorp (Oregon) | Schedule 4 - Residential (Single Phase) | Flat | $686–$1,121 | 19–31y |
| PacifiCorp (Oregon) | Schedule 4 - Residential (Three Phase) | Flat | $686–$1,121 | 19–31y |
| PacifiCorp (Oregon) | Schedule 6 - Residential - TOU (Single Phase) | Time-of-use + tiered | $419–$856 | 25–50y |
| Portland General Electric Co | Residential Service (Rate 7) | Flat | $503–$823 | 26–42y |
| Idaho Power Co | Schedule 5 - Residential Time-of-Day | Time-of-use | $398–$795 | 26–53y |
| Idaho Power Co | Schedule 5 - Residential Time-of-Day | Time-of-use | $440–$728 | 29–48y |
Price it for your own usage and system size →
What would change this
Your roof. Production is modeled for Portland on a south-facing array at 20° tilt. Shading, orientation and pitch all move it, and solar resource varies within Oregon itself.
Your usage pattern. A household at home during the day self-consumes more and exports less, which shortens payback wherever export credit is poor.
Rising rates. These figures hold today's prices flat. Electricity prices have been rising, and every rise shortens payback — so treat these as a conservative bound.
State and local incentives. Not included here, and in some states they are worth more than the federal credit was. Check your state energy office before deciding.