Solar Calculator for Oregon: Costs, Incentives & ROI
Oregon's residential solar market is shaped by a geographic divide between the wet, temperate western valleys — home to Portland and Eugene — and the dry, high-irradiance eastern high desert, combined with a set of incentives that include cash rebates through the Energy Trust of Oregon, full-retail-rate net metering for customers of major investor-owned utilities, and a natural cost advantage that no other state can claim: Oregon has no sales tax, meaning solar equipment and installation labor are automatically exempt from sales taxation without requiring a special exemption or rebate filing. The Energy Trust of Oregon, a nonprofit organization funded through utility customer charges, administers the Oregon Solar + Storage Rebate Program for residential customers of Pacific Power and Portland General Electric, providing cash rebates that reduce the upfront cost of a qualifying solar installation. Oregon's net metering rules, governed by the Oregon Public Utility Commission under OAR 860-083, require Pacific Power and PGE to credit excess solar generation at the full retail rate for systems up to 25 kilowatts on residential accounts. Eugene Water and Electric Board operates its own net metering program with comparable full-retail-rate crediting. Oregon's electricity rates fall slightly below the national average, which moderates payback periods compared to high-rate states, but eastern Oregon homeowners with abundant sun exposure often achieve economics comparable to southwestern markets. Use the calculator below to estimate your payback period and 25-year savings based on your ZIP code, utility territory, and system size.
Incentive data updated: May 2026(may be outdated)
Average Solar Cost in Oregon
Average installed solar costs in Oregon typically range from $2.60 to $3.10 per watt before incentives, based on Lawrence Berkeley National Laboratory Tracking the Sun data and EnergySage marketplace pricing for the Pacific Northwest. A typical six-kilowatt residential system costs roughly $15,600 to $18,600 before the federal Investment Tax Credit — modestly below the national average due to Oregon's competitive installer market and the absence of sales tax on any purchase in the state. The thirty-percent federal ITC reduces the net cost to approximately $10,900 to $13,000. The Energy Trust of Oregon Solar + Storage Rebate provides an additional cash incentive — rebate amounts and eligibility are determined annually and vary by utility territory and program funding availability; homeowners should confirm current rebate levels directly with their installer or the Energy Trust website. For Portland-area homeowners served by PGE, the combination of federal ITC and Energy Trust rebate can bring the effective upfront cost of a six-kilowatt system materially below comparable systems in higher-cost markets like California or the Northeast. Eastern Oregon homeowners in Bend, Medford, and the high desert counties often see faster payback due to substantially higher annual solar production.
- Avg. installed cost
- $2.85/W
- Typical 6 kW system
- $15,600–$18,600
Top Solar Incentives in Oregon
Live incentive data not currently available for Oregon. See the federal incentive guidance via our Solar Tax Credit Calculator.
Electricity Rates in Oregon
Oregon residential electricity rates fall near or slightly below the national average, with most customers paying between 11 and 14 cents per kilowatt-hour on a blended basis including delivery charges. Portland General Electric customers typically pay between 12 and 14 cents per kilowatt-hour, while Pacific Power customers in western and eastern Oregon service territories often see similar rates with some variation by rate schedule. Eugene Water and Electric Board, the municipal utility serving the Eugene-Springfield area, typically offers competitive rates in the 10 to 12 cent range reflecting the low-carbon hydro-heavy generation mix common to Pacific Northwest utilities. The moderate electricity rate environment in Oregon means solar payback periods are somewhat longer than in high-rate states like California or Massachusetts, but the Energy Trust rebate, no-sales-tax environment, and favorable net metering framework partially compensate. Rate trends in Oregon have been gradually upward as PGE and Pacific Power invest in clean energy compliance under Oregon's 100 Percent Clean Electricity law, which mandates a carbon-free grid by 2040 — a trajectory that increases the long-run value of solar generation already installed.
Peak Sun Hours in Oregon
Oregon's solar resource varies dramatically by geography. The Willamette Valley — encompassing Portland, Salem, and Eugene — averages between 3.8 and 4.4 peak sun hours per day, limited by persistent marine cloud cover from the Pacific during the October through March rainy season. Central Oregon, anchored by Bend and Redmond in Deschutes County, is a dramatically sunnier environment with 5.0 to 5.5 peak sun hours per day, rivaling parts of Arizona or Nevada. Medford and the Rogue Valley in southwestern Oregon split the difference, averaging around 4.8 to 5.2 peak sun hours per day in a warmer, drier microclimate. Eastern Oregon — including Baker City and Ontario — receives comparable high irradiance to the central Oregon plateau. For Portland-area homeowners, the lower annual sun hours mean a larger system is needed to achieve the same annual output as an identical system in central Oregon. NREL's PVWatts tool uses ZIP-code-level Typical Meteorological Year data, so the production estimate from the calculator above captures Oregon's marked regional variation.
Example ROI for a 6 kW System
- Estimated annual savings
- $1,150
- Payback period
- 10.0 years
- 25-year net savings
- $19,000
Run a personalized estimate with your ZIP code using the Solar ROI Calculator.
Major Cities in Oregon
- Portland97201
- Salem97301
- Eugene97401
- Bend97701
- Medford97501
Common Questions About Solar in Oregon
What is the Energy Trust of Oregon Solar + Storage Rebate?
The Energy Trust of Oregon is a nonprofit organization funded through a small charge on Pacific Power and PGE customer bills. Its Solar + Storage Rebate Program provides upfront cash rebates to eligible residential customers who install qualifying solar photovoltaic systems, and additional incentives for systems paired with battery storage. Rebate amounts are set annually and vary by program funding availability, system size, and utility territory — homeowners should confirm current incentive levels with their installer or directly through the Energy Trust website before signing a contract. The Energy Trust rebate reduces the net installed cost before the federal ITC calculation, though it does not reduce the ITC basis (the federal credit is still calculated on the full installed cost minus any rebates that directly offset the system price under applicable IRS rules). Only customers of Pacific Power and Portland General Electric within Oregon are eligible; Eugene Water and Electric Board customers should contact EWEB directly for their solar incentive programs.
Does Oregon have net metering for solar?
Yes. Oregon's net metering rules, administered by the Oregon Public Utility Commission under OAR 860-083, require Pacific Power and Portland General Electric to credit excess residential solar generation at the full retail rate for systems up to 25 kilowatts. Credits accumulate monthly and roll over; at the end of a twelve-month reconciliation period, any remaining credit may be paid out at the utility's avoided-cost rate or carried forward depending on the specific rate schedule. Eugene Water and Electric Board operates a comparable net metering program for its service territory. The full-retail-rate credit is the financially significant element — each kilowatt-hour exported earns the same credit as a kilowatt-hour consumed from the grid would cost, maximizing the bill-offset value of solar production.
Is there a sales tax exemption for solar in Oregon?
Oregon has no general state sales tax, making this question moot — solar equipment and installation labor are automatically purchased without sales tax because no sales tax applies to any transaction in Oregon. This is a significant natural cost advantage compared to states like California (7.25 percent base), Washington (6.5 percent base), or Colorado (2.9 percent base plus local) where a separate solar exemption must be legislated and applied. Oregon homeowners pay no sales tax on solar panels, inverters, mounting hardware, wiring, or installation labor simply because no sales tax exists in the state. This permanently reduces the effective installed cost compared to neighboring states.
How does solar performance differ between Portland and Bend?
Bend in central Oregon receives approximately 5.0 to 5.5 peak sun hours per day, compared to Portland's 3.8 to 4.4 peak sun hours per day — a difference of roughly 25 to 40 percent in annual solar production per installed kilowatt. A six-kilowatt system in Bend might produce 8,500 to 9,500 kilowatt-hours per year, while the same system in Portland might produce 6,500 to 7,500 kilowatt-hours. At comparable electricity rates, the Bend homeowner achieves a shorter payback period by two to four years. Both are served by the Oregon net metering framework, both benefit from no sales tax and the federal ITC, and Bend-area Pacific Power customers may also be eligible for Energy Trust rebates. Eastern Oregon homeowners in the high desert should use the calculator with their specific ZIP code to capture local irradiance rather than relying on statewide or Portland-area averages.
Can Oregon homeowners combine the Energy Trust rebate with the federal ITC?
Generally yes, but with an important nuance regarding the federal tax treatment. The federal Investment Tax Credit is calculated as 30 percent of the qualified system cost. If a rebate from a utility or government-adjacent entity reduces the net cost you pay — a utility rebate under section 136 of the Internal Revenue Code — it may reduce the ITC basis. Energy Trust rebates have historically been structured to preserve the full ITC basis, but tax treatment can change, and individual circumstances vary. Homeowners should confirm the federal tax treatment of any Energy Trust rebate with a qualified tax professional before assuming the full 30 percent applies to the gross system cost. Oregon does not have a state income tax credit for residential solar since the Residential Energy Tax Credit (RETC) was discontinued in 2017, so the federal ITC and Energy Trust rebate represent the primary incentive stack.