Solar Maintenance & Cleaning in Chandler, AZ

Solar maintenance and cleaning matters more in Chandler than in rainy parts of the country. The city averages only about 9 inches of rain a year, so panels rarely get a full rinse. Dust from monsoon storms, farm fields and construction settles on the glass, and the occasional light shower turns it into a muddy film that dries hard. Bird droppings add spots that block light from whole cells.

How dirt affects output

A thin, even layer of dust trims output a little. Heavy dirt, droppings or mud near the bottom edge of the panel can do more, because shading part of a cell can reduce output for that whole section of the panel. EnergySage notes that desert areas like the Southwest need more frequent cleaning than most places. How much output a cleaning recovers depends on how dirty the panels were, which is why we compare production before and after.

Why we use purified water

Tap water can leave hard-water spots and residue on glass, especially when it dries fast on a hot panel, and those spots block light and are hard to remove. Professional cleaning uses purified or deionized water with soft brushes so the glass dries clear. We avoid pressure washers, harsh chemicals and abrasive pads, which can damage the glass coating or the seals around the panel edges, and we clean in the morning before the glass gets hot.

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More than a wash

While we are on the roof, we take a look at the things that wear in this climate: connectors, cable supports, conduit straps, the racking and roof attachments, and signs of birds settling under the array. On the ground, we check the inverter for error history and look over the disconnects. If production numbers were low before the cleaning, we compare them after to see whether dirt was the whole story or there is another problem to track down.

How often to clean

Most Chandler systems benefit from a cleaning once or twice a year. Good times are after the monsoon season, when storms have left dust on the panels, and in spring before the long summer production months. Homes near open fields, unpaved lots or active construction may need more. Watching your monitoring is the simplest guide: if output drifts down on clear days and recovers after a cleaning, you have found your schedule.

Safety on the roof

Walking on concrete tile can crack it, and wet glass on a pitched roof is slippery. If you clean your own panels, do it from the ground with a soft brush on an extension pole and purified water, early in the day. Never spray water on hot panels or climb onto the array itself.