Time it to the North Coast seasons

Best Time of Year to Clean Solar Panels

The best times to clean solar panels in Humboldt County are spring and late summer. Spring clears the moss and pollen that built up over a wet winter, and a late-summer clean resets your array before the rains return to the coast. Timing the visits to those windows gets you the most output for the money.

The spring clean

Spring clears winter's moss and pollen

Spring is prime time because a damp North Coast winter leaves moss, lichen and heavy pollen on the glass. Clearing it as the sunnier months arrive means you capture the strongest production window clean. Eureka and Arcata homeowners see the biggest spring payoff after a wet season.

The late-summer reset

Late summer resets you before the rains

Late summer is the second key window, clearing dust, pollen and any wildfire ash before the wet season returns. Going into winter with clean panels means less bonded buildup to remove later. It's the cheaper path than letting a season's grime set in.

Wildfire season

Clean after heavy smoke or ash events

Beyond the two main windows, inland Humboldt homes near Willow Creek should clean after significant wildfire smoke or ashfall. Ash is gritty and settles into a film that cuts output and can be abrasive if wiped dry. A proper wash after a smoke event protects both output and the glass.