Cleaning Solar Panels: Why, When and How You Should Do It
Last Updated on February 22, 2023 by Kravelv
There are times when you might notice that your solar panels are not performing as well as they used to. One reason could be that they’re dirty! Solar panels are constantly exposed to the elements, and over time, dirt, dust, and other debris can accumulate on their surfaces. This buildup can significantly reduce their efficiency, leading to lower energy production and increased costs.
In this article, we’ll take a closer look at why you should clean your solar panels, when to do it, and how to go about it. We’ll also provide some useful tips and recommendations to help you get the most out of your solar panel system.
Why Clean Solar Panels?
Solar panels work by converting sunlight into electricity. They are designed to capture as much sunlight as possible, and any obstructions or impediments to this process can significantly reduce their efficiency. Dirt, dust, and other debris on the surface of your solar panels can act as a barrier, preventing sunlight from reaching the photovoltaic cells and reducing the amount of energy they produce. In fact, studies have shown that even a thin layer of dust can decrease efficiency by up to 10%! This reduction can translate into lost savings for homeowners and businesses that rely on solar power.
Regular cleaning of your solar panels can help to remove this buildup and ensure that they are operating at their maximum capacity. In addition to improving energy production, keeping your solar panels clean can also extend their lifespan and prevent potential damage caused by long-term exposure to the elements.
When Should You Clean Your Solar Panels?
The frequency of cleaning your solar panels depends on several factors, including the location, weather conditions, and surrounding environment. As a general rule of thumb, you should clean your solar panels at least twice a year, preferably before the start of the summer and winter seasons. These seasons tend to bring more dust, debris, and extreme weather conditions that can reduce the efficiency of your panels.
However, if you live in an area with heavy rainfall or near a dusty construction site, you may need to clean your panels more frequently. Similarly, if you have trees near your solar panels, you may need to clean them more often to prevent bird droppings, leaves, and other debris from accumulating on the surface.
How to Clean Your Solar Panels?
Cleaning solar panels is a straightforward process that can be done with a few simple tools and materials. Here’s what you’ll need:
- Soft-bristled brush or sponge
- Bucket of warm water
- Cleaning solution (mild soap or specialised solar panel cleaner)
- Hose or pressure washer (optional)
Before you begin, it’s important to consult the manufacturer’s instructions for your solar panels to ensure that you’re using the right cleaning methods and solutions. Some solar panel manufacturers may recommend specific cleaning products or advise against using certain types of equipment or cleaning solutions.
To clean your solar panels, follow these steps:
- Turn off your solar panels: Before starting the cleaning process, turn off your solar panels to avoid any electrical shocks.
- Gather your cleaning supplies: You will need a bucket of warm water, a non-abrasive sponge, and a squeegee or soft cloth. Avoid using harsh chemicals, abrasive materials, or high-pressure washers as these can scratch or damage the panels.
- Rinse the panels with water: Use a hose or a spray bottle to rinse the panels with water to remove any loose debris.
- Clean the panels: Dip the sponge in the warm water and gently scrub the surface of the panels. Start from the top and work your way down in a horizontal motion. Avoid applying too much pressure as this can scratch or damage the panels.
- Rinse the panels again: Once you’ve cleaned the panels, rinse them with water again to remove any remaining soap or debris.
- Dry the panels: Use a squeegee or a soft cloth to dry the panels. Avoid leaving any water or soap residue as this can affect their efficiency.
Bird Proofing Your Solar Panels
Birds can be a major source of debris on your solar panels, and their droppings can be difficult to remove. To prevent birds from nesting on or around your solar panels, you can install solar panel bird proofing measures such as mesh netting, spikes, or wire mesh. These measures can help to prevent birds from roosting on your solar panels and causing damage or leaving droppings that can reduce their efficiency. It’s important to note that some bird deterrents may require professional installation or may not be suitable for all types of solar panels.
In addition to bird proofing, there are also other measures you can take to minimise the amount of debris that accumulates on your solar panels. For example, trimming trees or bushes near your solar panels can help to reduce the amount of leaves and twigs that fall onto them.
Cleaning your solar panels is a crucial maintenance task that can significantly impact their performance and longevity. By following the recommended cleaning frequency and using the proper cleaning methods and tools, you can ensure that your solar panels are producing the maximum amount of energy possible.
Also, taking preventive measures such as bird proofing can help avoid the accumulation of debris and bird droppings, which can be challenging to remove. Remember to always follow the manufacturer’s instructions and safety precautions when cleaning your solar panels to avoid damaging them or yourself.