Solar Panel Cleaning in Beaverton, OR

Clearly Amazing cleans rooftop solar arrays in Beaverton, working from an office on SW 74th Avenue in Tigard a few minutes south. Beaverton gets plenty of rain, but hardly any of it arrives in midsummer, so an array here gets washed constantly through the darkest months and then left alone through the brightest ones. We wash with deionized water, soft brushes and eco-friendly products, never pressure, and we look at the mounts and the roof underneath while we are up there.

Call (503) 255-2532 for a free on-site estimate.

Nothing rinses your panels through the summer

Beaverton’s rain is not spread evenly across the year. The wettest months are November, December and January, and NOAA’s 1991–2020 normals for Portland–Hillsboro Airport put the year’s total at about 36 inches. That is a lot of water, and almost all of it lands in the half of the year when the sun is lowest and the days are shortest.

Then it stops. Through the long days of high summer there is no meaningful rain to move anything off the glass, so whatever settles in June is still there in September. Dust off dry ground, pollen, road film, whatever the wind carries — it builds as an even layer rather than a patch or a streak, which is exactly why nobody notices it from the driveway.

The other half of the pattern matters too. The first proper rain of the fall does not lift a summer’s film cleanly off the glass. It wets it, moves it around, and dries it back down thinner and more stubborn.

Freezing weather is not a driver here the way it is in colder states. Regionally, the NOAA 1991–2020 normals at Portland Airport put the average freeze-free period at 232 days, with the last spring freeze around March 25. Long mild damp seasons and short frost seasons are good conditions for organic growth and unremarkable ones for ice.

Your array sits on a valley floor that used to be wetland

Beaverton sits in the eastern Tualatin Valley, about seven miles west of Portland. The valley floor runs around 180 feet in elevation and the city itself around 236 feet, inside a ring of higher ground: the Northern Oregon Coast Range to the west, the Tualatin Mountains to the north and east, the Chehalem Mountains to the south. Before settlement this was low, fertile wetland threaded with small lakes and creeks; the city incorporated in 1893. Beaverton Creek still runs through it, feeding Rock Creek, which feeds the Tualatin River.

Low, enclosed ground holds damp longer than open ground does, and that is the most useful thing to know about solar here, because organic growth on glass and aluminum needs time damp more than anything else. Two identical arrays — one on an open lot, one tucked below mature planting near a creek corridor — will not be in the same condition a year after both were cleaned. The shaded one wants looking at more often, not less.

Elevation changes the picture inside the city as well. Cooper Mountain rises to 764 feet south of central Beaverton, close to 600 feet above the valley floor, and a roof up there sits in more air movement than one down on the flat. That helps with standing damp. It does nothing about shade, and shade is what actually decides how fast an array dulls, wherever the house sits.

What the job involves

Every visit runs the same three steps.

Areas we cover in Beaverton

The City of Beaverton organizes the city into 11 official Neighborhood Association Committees, and we work across all of them: Central Beaverton, Denney Whitford/Raleigh West, Five Oaks/Triple Creek, Greenway, Highland, Neighbors Southwest, Sexton Mountain, South Beaverton, Vose, West Beaverton and West Slope, plus the surrounding Washington County area.

Beaverton is one of the towns the Silicon Forest was named around — Tektronix built its headquarters on 313 acres of former Beaverton farmland after moving to Washington County in 1951, and Nike’s Philip H. Knight Campus covers roughly 400 acres here. Most of our solar work is still residential rooftop. If you have panels on a low-slope commercial roof, call and we will come and look; access decides that one rather than the panels.

When to schedule

Late June or early July is the ideal window. The wet season has finished, spring pollen is down and off, and a clean at that point carries you through the three months with the most daylight and the least rain.

October is the useful second slot. Going into November with clean glass and clean frames means the wettest three months of the year run over a surface with nothing on it, rather than washing a summer’s film down the panel and drying it back on.

We clean year-round, and any month is a fine month to book. People call in February because a monitoring app has them wanting one variable ruled out, in April because there is already equipment on the house, and in November because that is the week they are home. All good reasons. Cleaning on a regular cycle is maintenance on a system you paid real money for, the same as servicing anything else on the house.

Questions Beaverton customers ask