Technically, yes – you can pressure wash solar panels, but it’s not recommended unless it’s done by a professional. While pressure washers can remove built-up grime, using the wrong pressure, angle, or technique can crack the surface, damage seals, or force water into the wiring, leading to faults and voided warranties.
Solar panels are delicate and require care when being cleaned. DIY pressure washing often causes more harm than good, especially without the right equipment or safety knowledge.
At Pressure Up, we use low-pressure, non-abrasive methods that are safe for your panels and approved by manufacturers. Our approach protects your system while restoring performance and improving energy output.
We’ll explain why pressure washing solar panels is unsafe, what’s at stake if you try it yourself, and how expert solar panel cleaning helps you protect your investment and boost energy savings.
What Are the Risks If I Pressure Wash Solar Panels?
Solar panels aren’t designed to withstand high-pressure water. While the frames may seem sturdy, the surface is made of tempered glass that can crack or fracture under intense force. Even if the damage isn’t visible, water can still find its way into the electrical components.
Pressure washing can lead to:
- Cracked or chipped glass, which reduces light absorption and lowers energy output
- Water getting in seals or wiring, leading to faults or corrosion
- Loosened panel fittings or mounting points, which compromise structural safety
- Electrical hazards, especially if water contacts exposed connections
- Voided warranties, as most manufacturers prohibit high-pressure cleaning methods
These risks don’t always show up straight away, but they can reduce system efficiency and lead to costly repairs down the track. In most cases, the money saved by doing it yourself is quickly lost in repairs or reduced performance.
If your panels need cleaning, it’s safer and smarter to leave it to professionals who use methods approved by manufacturers and designed to protect your system.
Will Cleaning My Solar Panels Void the Warranty?
Yes it can, depending on how it’s done. Most solar panel manufacturers include maintenance guidelines in their warranty terms. Using a pressure washer, harsh chemicals, or abrasive tools often goes against those terms and can void your warranty. Always check your manufacturer’s warranty guidelines before cleaning your solar panels.
DIY cleaning comes with the risk of damaging the panel surface or frame, even if it’s accidental. And if a claim is made later, manufacturers may inspect your system for signs of incorrect cleaning.
To keep your warranty valid, it’s better to hire professionals who understand them. At Pressure Up, we clean according to industry standards and manufacturer guidelines, giving you peace of mind that your panels stay protected in every way.
How to Clean Solar Panels Safely
Cleaning solar panels safely requires the right technique, tools, and timing. A soft, steady approach is key. Avoid pressure washers, harsh chemicals, or rough scrubbing.
Safe cleaning means using purified water, soft brushes, and non-abrasive techniques – never high pressure or harsh chemicals. You also need to consider the risk of working at heights and make sure you have the right safety gear.
Professional cleaning takes the guesswork out. Our team uses gear that’s made for solar panels, strong enough to clean properly but gentle enough to protect your system and your warranty.
How Often Should You Clean Solar Panels?
For most homes, solar panels should be professionally cleaned every 6 to 12 months. This keeps them working at their best and helps prevent a gradual drop in energy output caused by dirt, dust, and debris.
If your roof is near trees, exposed to bird droppings, or affected by high winds or dust storms, you may need to clean them more often. Homes in rural or coastal areas also tend to see faster build-up.
Regular cleaning doesn’t just keep your panels looking better—it keeps your power bills down. Even a thin layer of grime can reduce how much sunlight reaches the cells, which means your system has to work harder to produce the same energy.
At Pressure Up, we offer scheduled solar panel cleaning in Toowoomba and surrounding areas. Whether it’s part of your yearly maintenance or something that’s overdue, we’re ready to help you get the most from your system.
Signs your Solar Panels Need Cleaning
Not sure if it’s time to clean your solar panels? Here are a few common signs to look out for:
- Visible dirt or bird droppings on the panel surface
- Sudden drops in energy output, especially on clear and sunny days
- Noticeable shading or patchy grime when viewed from the ground
- Higher electricity bills, even though your usage hasn’t changed
- Nearby dust sources, such as farms, construction sites, or trees
Even if your panels look mostly clean, fine dust or residue can still block sunlight and reduce efficiency. The only way to be sure they’re working at full capacity is with a professional clean.
If you’re seeing any of these signs, it’s a good time to book in. At Pressure Up, we’ll restore your system’s performance safely and thoroughly—so you can keep enjoying lower bills and better results.
Get your Solar Panels Cleaned the Right Way!
Solar panels are a long-term investment, and keeping them clean is key to getting the best return. But that doesn’t mean you should do it yourself.
At Pressure Up, we know how to clean panels safely, without pressure washers or harsh chemicals. Our team uses the right equipment to protect your panels while removing the dirt that blocks performance, so we can maximise your energy output!
Whether your panels are on a single-storey home or a multi-level roof, we’ll get the job done properly so you get more power, fewer issues, and peace of mind.
Need a safe, professional solar panel clean?
Stop losing power to dirt and grime. Get a free quote for our solar panel cleaning service in Toowoomba and enjoy more energy, lower bills and no risk to your system.
