![]() ![]() Solar Panel Wash Video (Source – Polywater) Use Water With a Similar Temperature It is also recommended that the water jet cleaning creates a sheet of water spray at the nozzle in order to reduce the pressure received by the glass. As a general approach, it is recommended that when using a hose, pressure stays below 40bar. Using high pressure to clean the solar panels can force water to enter into the junction box or plugs that are not 100% sealed. If you do not have access to de-ionized or distilled water, you can use a water-softening hose attachment to filter those minerals. Mineral-rich water may leave deposits of particles over time and its chemistry is not recommended for the glass of modules. Module manufacturers recommend the use of distilled or de-ionized water to clean solar panels. However, if they are located on the roof, then you must use a soft brush coupled with a long extension to make the work easier and safer from the ground.Īvoid Using Water with High Mineral Content ![]() If your solar panels are installed on the ground, then you can opt to use a simple sponge to clean them up or a soft brush as well. The glass is strong but using abrasive materials can scratch the surface of the glass, reducing its performance or even damaging the module. When cleaning solar panels it is essential to use the right cleaning equipment. This will guarantee security in any case for the homeowners and firefighters as well.Īlways remember to push that red button in the rapid shutdown box before going to clean your solar panels. New PV systems in the US according to NEC 2017 are now required to have a rapid shutdown system, that will instantly reduce the voltage of the PV array to zero from an easy access location inside the house or business. This is essential to guarantee your safety and to make sure that the solar panels won’t get damaged by water inside the junction box, exposed wires, or broken seals while DC electricity is flowing through the system. The first step that you need to think of before cleaning your solar panels is to turn off the DC switch located in the combiner box. Tips Before Cleaning Turn Off the PV System That is why it is important to know how often or when to clean your solar panels. Typical annual losses attributed to this factor are located between 2% and 5% regularly, however, by accumulating soiling on the PV system, losses can increase over time. ![]() Soiling on solar panels related to debris, dust, bird droppings, or dirt can accumulate on the surface of the module and lead up to 30 % annual losses in worst cases. In this article you will learn some valuable tips that will make the cleaning process even easier for you. However, there are different ways to clean them and various tips that should be used during the process. Using a soft brush with distilled water and dish soap is sufficient to clean your solar panels. ![]()
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