If you own a warehouse in Clackamas, a winery in Dundee or a shop building in Vancouver and you have been meaning to look at solar, the timing question changed this summer — and not in the direction most people assume.
Here is the current landscape for commercial solar in Oregon and Washington, in plain terms. As always with tax matters, confirm the specifics with your own accountant; what follows is the shape of the thing, not advice for your books.
What changed for commercial solar in 2026?
The residential credit and the commercial credit went in different directions. The residential credit under Section 25D ended for systems placed in service after 31 December 2025. The commercial credit under Section 48E survived — but with a deadline structure that split businesses into two groups on 4 July 2026.
Projects that had begun construction by that date keep a long runway. Projects that had not are now working to a placed-in-service deadline of 31 December 2027.
What does that mean if you have not started?
It means the clock is a project timeline rather than a filing deadline. Being “placed in service” means the system is complete, inspected, interconnected and operating — not ordered, not permitted, not installed but awaiting permission to operate.
Work backwards from the end of 2027 and it is less generous than it sounds. Commercial projects involve design, structural review, utility interconnection studies for larger systems, procurement, installation and inspection. Interconnection in particular is the step nobody controls and everybody underestimates.
Does the deadline apply to battery storage?
No, and this is the part most commercial owners have not heard. Standalone battery storage sits on a different and much longer timeline than solar under the current rules, with a phase-out running toward the next decade.
For a business weighing both, that changes the sequencing conversation. Solar is the piece with the near-term deadline; storage has room to follow.
What about depreciation?
Depreciation is the other half of commercial solar economics and it is easy to overlook while focusing on credits. Accelerated depreciation applies to solar equipment, and the interaction between the credit and the depreciable basis — the half-basis rule — is the step most online calculators get wrong. We wrote that up in detail in our commercial MACRS guide for Oregon and Washington.
What should a business owner do now?
- Pull twelve months of billing data, including the demand charges — commercial bills have an energy component and a demand component, and solar reliably reduces only one of them
- Get the roof assessed for age and structure before designing anything; a membrane with a few years left changes the whole plan
- Ask about interconnection early, because larger systems can require a study rather than a simple application
- Talk to your accountant about which pathway your project falls under before you commit to a schedule
Why does local matter on a commercial project?
Because the constraints here are local: which jurisdiction reviews the permit, how your particular utility handles a commercial interconnection, whether your service is single or three-phase, and what a Pacific Northwest production model actually looks like for a flat roof in Woodburn versus a pitched one in Stevenson.
Sunbridge Solar has worked in NW Oregon and SW Washington for over 15 years, we are verified by the Energy Trust of Oregon, and our installations carry a 10-year craftsmanship warranty and 25-year product warranties. We will tell you plainly which part of your bill an array actually solves — and which part it does not.
Frequently asked questions
Is the commercial solar tax credit still available in 2026?
The Section 48E commercial credit survived the changes that ended the residential 25D credit. Projects that began construction by 4 July 2026 keep a long runway; those that did not must be placed in service by 31 December 2027. Confirm your project’s pathway with your accountant.
What does “placed in service” actually mean?
Complete, inspected, interconnected and operating — not ordered, permitted or merely installed. That distinction matters because permission to operate from the utility is often the last and least predictable step.
Does the 2027 deadline apply to battery storage too?
No. Standalone storage runs on a longer timeline than solar under the current rules, with a phase-out later in the decade. For businesses considering both, solar is the piece with the near-term deadline.
Will solar reduce my commercial demand charges?
Not reliably on its own. Solar dependably cuts the energy portion of a commercial bill; demand charges are set by your highest sustained draw, which may fall outside production hours. Storage or load controls address demand.
How long does a commercial solar project take?
Longer than residential, and interconnection is the variable. Design, structural review, procurement, installation, inspection and utility sign-off all sit on the critical path — which is why a 2027 in-service deadline is a 2026 decision.
Talk it through before the timeline decides for you
Call 360-313-7190 for a no-pressure commercial consultation. Sunbridge Solar serves Camas, Washougal, Vancouver, Portland, the Columbia River Gorge and the wider Willamette Valley.
