Solar Panel Cleaning Brush Guide for Optimal Performance

Cleaning is an essential part of owning solar panels, as it is part and parcel of the deal.

But before beginning the cleaning process, we first need to identify the best and most affordable solutions out there.

Today’s blog post will cover the same topic extensively, including its benefits, types of cleaning brushes, and address commonly asked questions related to cleaning panels.

Why Panels Cleaning Matters?

Solar panels don’t move like rotating generators to generate electricity. Because of that dust and other particles accumulate more easily on their surface.

The result? reduction of solar output (reduced electric current).

There is research conducted by the  National Renewable Energy Laboratory which estimates that dust and other particulates decrease the efficiency of solar panels by 7%.

So this is how it’s important to clean the panels for the best possible output.

How Often Solar Panels Should be Cleaned

There is no hard and fast rule for cleaning. It might be twice a month, every month, but at least once every six months.

The cleaning frequency depends on several factors such as:

• Dusty or polluted areas may require cleaning every three to six months.
• Climate: Areas with less rainfall accumulate more dirt, which may result in monthly cleaning
• Location: Residence near construction sites or high-traffic areas can increase dirt accumulation. So need regular checkups.
• Shading: Panels that are shaded may require more frequent cleaning due to faster plant remain buildup.
• Orientation and angle: South or west-facing panels may collect more dust and need better regular cleaning.

Solar Panel Cleaning Brush

In Pakistan, there are many options available for solar panel cleaning (depending on your pocket). We’ll have a quick roundup of common and effective methods that are adopted for the said purpose.

Cleaning With Two Star Wiper Brush

Two Star Brush is a high-quality product made in Pakistan, and what sets it apart is that you can achieve professional cleaning by using it yourself.

You can easily purchase from online stores merely with a cost of not more than PKR 5000.

It comes with three different sized (further extendable) tailored to your needs.

Design: Features an extra-large brush head (33×8 cm) with a gimbal joint for multi-angle adjustment.

Pole Length: Extendable from 8ft to 22ft, made of high-quality stainless steel.

Durability: Designed to withstand water pressure up to 230 PSI, suitable for thorough cleaning.

Cleaning With Telescopic Wash Brush

Telescopic brush is another great option—a bit more expensive. One thing that makes it a standout brush (that I like the most)is its brush softness and water-absorbing quality that gives a better finish.

Two Star Wiper brush offers specialized features for solar panel cleaning only. In contrast, telescopic brushes are more general-purpose tools that can be used for various cleaning tasks (like windows, mirrors, and cars).

Functionality: A general-purpose cleaning tool with an extended pole for hard-to-reach areas.

Water Control: Features an on/off water shower valve for better cleaning efficiency.

Cleaning With Cloth (the last option)

If you’re not willing to spend a penny on the above option (by the way, I will not recommend it), then the last option is washing your panels with a soft cloth for improved efficiency.

Use a soft, dust-free cloth to gently wipe the surface of the solar panels.

Avoid using abrasive materials like scouring pads, as they can scratch the glass surface and damage the panels.

Dip the cloth in a bucket of water mixed with a few drops of mild, non-detergent soap or a specialized solar panel cleaning solution.

Step-by-Step Process for Cleaning Solar Panels

Step 1: Gather Your Tools and Materials

• Soft-bristled brush or sponge
• Hose with Two-star or Telescope brush
• Specialized solar panel cleaning solution (it’s not mandatory)
• Bucket (if needed)
• Safety equipment (gloves, non-slip shoes, ladder if on a roof)

Step 2: Turn Off the Solar Panel System

Before cleaning, ensure that your solar panel system is turned off to avoid any electrical hazards.

Step 3: Remove Loose Dust and Debris

Use a soft brush to gently remove any loose dust, or leaves from the surface of the solar panels. This helps prevent scratching during the cleaning process.

Step 4: Rinse the Panels

Using a hose with a solar panel brush (discussed above), flush the panels with water. Ensure the water pressure is low to avoid damaging the panels. This step helps to remove any remaining loose dirt.

Step 5: Scrub Gently

Gently scrub the panels with a soft brush or sponge, focusing on areas with more dirt or stains. Be careful not to apply too much pressure (as this could scratch the surface).

Step 6: Rinse Thoroughly

After scrubbing, again rinse the panels thoroughly with clean water to remove any residue.

Step 7: Monitor Solar Output

After cleaning, monitor the solar output to ensure that the panels are functioning optimally. A noticeable increase in energy production indicates a successful cleaning.

What Are the Risks of Using a Pressure Washer

The specialized solar brush has very mild and low-pressure water that gently rinses on the panel’s surface.

But High pressure (commonly used pipes) can cause physical damage to the solar cells, leading to micro-cracks that are not visible at first. These cracks result in hot spots, reducing the panel’s efficiency.

Also, the force of the water can strip away protective coatings on the panels, exposing them to environmental damage (jhakhar or rain). 

 If damage occurs as a result of pressure washing, you will not be able to claim the warranty.

It is important to consider these potential consequences when taking this risk.

Does Rain Clean the Solar Panels?

We oftentimes hear people say that the rain does just fine cleaning their panels. While the rain does wash some dirt off, it doesn’t truly clean the panels.

If the panels are already filthy, the rain just makes it worse by converting dust to thick layers of mud.

The perfect analogy is to consider your car. If your car hasn’t been washed in six months, does leaving it out in the rain make the dirt better or worse?

The same is true with dirty solar panels.

Is It Safe to Clean Panels With Soap?

Many experts recommend avoiding soap when cleaning solar panels. The primary reason behind this recommendation is that soap can leave remains. That attracts more dirt and reduces the panels’ efficiency as time passes.

So is there any alternative?

It is suggested to use plain water or specialized cleaning solutions designed for solar panels (that are free from detergents).

Solar Panels Cleaning Services Near Me

Throughout this post we’ve discussed the DIY (do it yourself) process. But if you prefer professional cleaning (if you do not need regular cleaning) it definitely offers a unique experience.

Because they know their work and understand the best techniques and equipment to use.

And don’t forget that cleaning solar panels can also be unsafe, especially if they are installed at height or on sloped roofs.

Professionals not only clean the panels but also inspect them for any potential issues, such as loose wiring or damage, which can be addressed on the spot to avoid costly repairs later.

Luckily some online solar companies offer panel cleaning services in Pakistan. I’ve jotted down some of them below for your ease. You can explore their services by visiting their online webpage.

• Sowash Cleaning Services
• Solar Panel Cleaning Services
• Smart Cleaning Services
• Pak Cleaning Services

The Bottom Line

Following the above modus operandi, efficient solar panel cleaning is ensured.

Make it a habit to perform this effortless task (although I admit that easy work can be challenging), as it will be beneficial in the long term, ultimately shortening your payback period.

Frequently Asked Questions