If your home or business uses solar energy, regular maintenance is key to keeping your system efficient. One of the most effective ways to do this is by cleaning your solar panels with a pressure washer. In this guide, we’ll explain how to do it safely and what tools to use.
Why Clean Solar Panels?
Over time, solar panels accumulate dirt, dust, pollen, and bird droppings — all of which can block sunlight and reduce energy output. Research shows that dirty solar panels can lose up to 25% of their efficiency. Cleaning them regularly improves performance, saves money and extends their lifespan.
Can You Use a Pressure Washer to Clean Solar Panels?
Yes — but it must be done carefully. A high-powered jet directed at the wrong angle can damage the panel surface. However, when used correctly, a Nilfisk pressure washer with the right accessories offers a safe, efficient, and chemical-free way to clean solar panels — no ladder required.
How to Clean Solar Panels With a Pressure Washer
- Use Low Pressure and Wide Spray
Use a low-pressure setting with a wide-angle nozzle to avoid damage. Avoid turbo nozzles or pencil jets. If you’re looking for the ideal tool, the Nilfisk Core series offers adjustable pressure for safer solar panel cleaning.
- Clean on a Cool Day
Perform cleaning early in the morning or on cloudy days. This prevents water from evaporating too quickly and leaving marks.
- Work From the Ground
Always clean from a safe distance. Use an extension lance if needed. Start at the top of the panel and move downward for full coverage.
- Rinse and Air-Dry
Finish with a clean water rinse using the same low-pressure setting. Let the panels dry naturally — no need to wipe.
Best Nilfisk Products for Cleaning Solar Panels
Here are a few recommended tools
- ✅ Nilfisk Compact or Core pressure washers– Compact and adjustable pressure control
- ✅ Auto Brush– Ideal for cleaning with a soft touch
- ✅ Extension Lance – Reach higher panels without ladders
How Often Should You Clean Your Solar Panels?
In most homes, you should clean them once or twice per year. If you live in an area with high pollen, air pollution, or lots of birds, clean them more frequently to maintain peak performance.
Summary: Keep Your Solar Panels Efficient With Nilfisk
Keeping your solar panels clean doesn’t require expensive services or risky ladder work. With a Nilfisk pressure washer, the extension lance and the right settings, you can maintain your system from the ground — quickly, safely, and effectively.
👉 Browse Nilfisk pressure washers and accessories now to find the perfect match for your home.
