Wildfire Ash Is Quietly Cutting Into Utah County Solar Savings
I was out doing a job for a homeowner recently who mentioned something that caught my attention. Their solar app had flagged a drop in power savings, and they had no idea why. So I got up on the roof to take a look, and the panels were covered in a fine layer of ash and soot. I cleaned them off, and within a day the homeowner watched their power savings jump back up 15 to 30 percent on their own app. That’s not a small dip. That’s real money, and it’s happening to homes all over Utah County right now without anyone realizing it.
Why Are Solar Panels Covered in Ash This Year?
Utah’s 2026 wildfire season has been one of the worst on record, with more than 800 fires and over 500,000 acres burned statewide. This isn’t just smoky air sitting over the valley. KSL and Fox13 have both reported actual ash falling and visibly coating cars, grass, and windows here in Utah County, not just haze in the sky. If it’s landing on your car and your windows, it’s landing on your roof and your panels too, and panels don’t get wiped down every time you walk by them the way a windshield does.
Is Wildfire Ash Different From Regular Dust?
Yes, and this is the part most homeowners miss. Ordinary dust gets knocked loose by wind and rinsed off by rain on its own most of the time. Ash behaves differently. Once it settles on glass and goes through a dew cycle or two, it can bake onto the surface and stop washing off with normal weather. At that point it just sits there, quietly blocking sunlight, until someone physically cleans it off.
How Much Power Am I Actually Losing to Ash?
Research on solar sites across the western US during smoke and ash events has measured output drops in the range of roughly 9 to 38 percent, depending on how heavy the ash is and how long it’s been sitting. The homeowner I mentioned above saw a 15 to 30 percent recovery once their panels were cleaned, which lines up almost exactly with what the research shows. That’s not a guess. That’s a system telling you, in its own app, exactly how much it was losing.
How Do I Know if This Is Happening to My Panels?
Most solar systems today come with a monitoring app that tracks daily and monthly production. If your numbers have quietly dipped over the past few weeks and you haven’t changed anything about your system, ash buildup is one of the most common and most overlooked explanations this time of year. A quick look at your panels from the ground, or a walk up to check them directly, will usually confirm it.
The Bottom Line
A wildfire season this severe means ash is landing on roofs across Utah County whether anyone notices it or not. It won’t rinse off on its own the way normal dust does, and every week it sits there is a week of lost production you already paid for. I clean solar panels across Utah County using deionized water as my only method, so panels come out completely spot-free with no scrubbing and no risk to the panel surface. If your solar app has been showing lower numbers lately, send me a message and I’ll get you a free quote.
Frequently Asked Questions
Can wildfire ash actually reduce my solar panel output?
Yes. Research on solar sites during wildfire smoke and ash events has recorded output drops of roughly 9 to 38 percent, and real homeowners have seen their production recover by 15 to 30 percent once ash was cleaned off their panels.
Will rain or wind clean wildfire ash off my panels on its own?
Usually not. Ordinary dust gets cleared by normal weather, but ash can bake onto the glass after a dew cycle and stop washing off naturally. At that point it has to be physically cleaned to restore full output.
How do I know if ash is affecting my solar panels?
Check your solar monitoring app for a recent, unexplained dip in production, or look at your panels directly for a visible layer of ash or soot. If your numbers have dropped and nothing else has changed, ash buildup is one of the most common causes this time of year.
If your solar app has been showing lower savings than usual, you can schedule a solar panel cleaning or learn more about the service and I’ll get you a free quote.