How to Clean Your Solar Panels (And When You Actually Need To)

One of the best things about solar panels is that they’re low-maintenance—but not quite no-maintenance.

Over time, dust, pollen, bird droppings, or even leaves can build up on the surface of your panels and slightly reduce their performance. The good news? Cleaning your panels is simple and doesn’t need to happen often.

Here’s what you need to know about when—and how—to clean your solar panels safely.

Do Solar Panels Really Need to Be Cleaned?

In most cases, nature does most of the work for you. Rain typically rinses away dirt and debris, especially if your panels are tilted.

That said, in especially dry areas or during long stretches without rain, grime can build up enough to reduce efficiency by 5–10%. If you live near trees, farms, or construction, your panels might collect more buildup than usual.

Tip: You don’t need to aim for spotless panels—just clear enough for sunlight to pass through easily.

How Often Should I Clean My Solar Panels?

• Every 6–12 months is usually enough

• If you notice a dip in energy production, that may be a sign it's time to clean

• Panels located under trees or in dusty regions may benefit from more frequent cleaning

How to Clean Solar Panels: A Step-by-Step Guide

Safety First: If your panels are on a pitched roof, we recommend hiring a professional. Never risk injury to clean your system.

If your panels are easy to access (like on a ground mount or flat roof):

1. Choose the right time – Early morning or late afternoon is best. Avoid hot, sunny hours to prevent water from evaporating too quickly or damaging the glass.

2. Rinse with water – Use a garden hose with a gentle spray to rinse off loose dirt. Avoid high-pressure nozzles.

3. Use a soft brush or squeegee – A telescoping pole with a sponge or soft cloth works well. If needed, use a mild soap and water solution—never harsh cleaners.

4. Rinse again thoroughly – You don’t want any residue left behind.

5. Let them air dry – Or use a soft cloth to prevent water spots.

   
   

What Not to Do

• Don’t walk on your panels (this can cause cracks or void warranties)

• Don’t use abrasive tools (like steel wool or scrub brushes)

• Don’t use harsh chemicals or pressure washers

• Don’t clean without turning off your system if recommended in your inverter manual

When to Call the Pros

Not comfortable climbing up? No problem. CHNG Energy partners with trusted local professionals who can safely clean your system and inspect it for wear.

It’s a great option if:

• Your roof is steep or hard to access

• You’re due for a routine solar system check-up

• You want maximum efficiency during high-production months (like spring and summer)

Clean Panels, Maximum Power

Keeping your solar panels clean helps them capture the most sunlight possible—so you get the biggest return on your investment. A little maintenance goes a long way toward long-term performance.

Need help with solar panel cleaning or inspections? Contact CHNG Energy and we’ll connect you with a local pro who can get the job done right.