How to clean photovoltaic modules correctly?
The reasons are as follows:
(1) Prevent the photovoltaic array from generating power loss due to man-made shadows during the cleaning process, and even produce hot spot effects;
(2) At noon or when the light is good, the surface temperature of the parts is high to prevent cold water from impacting the glass surface and causing damage to the glass or parts;
(3) Ensure the safety of cleaning staff.
In addition, when cleaning photovoltaic modules in the morning and evening, you should also choose a time when the sun is dim to reduce potential safety hazards. It can also be considered that sometimes cleaning can be carried out on rainy days. At this time, thanks to the help of precipitation, the cleaning process will be more efficient and thorough.
Daily cleaning can be divided into ordinary cleaning and cleaning.
Under normal circumstances, use a dry broom or rag to remove the attachments on the surface of the part, such as dry floating ash, leaves, etc. Hard foreign objects stuck to the glass, such as sand, bird droppings, and viscous materials, can be scraped with a hard scraper or gauze, but be careful not to scrape with hard objects to avoid damage to the glass surface. From the cleaning effect, it is necessary to clean.
For cleaning, the staining substances attached to the glass, such as guano residues, plant juices and other objects that cannot be removed, or wet soil and other objects that cannot be removed, should be cleaned. The cleaning process is generally rinsed with water and cleaned with a soft brush. If there is greasy dirt, you can wash the contaminated area with detergent or soapy water.
When cleaning photovoltaic power plants, how to protect photovoltaic modules from damage and the safety of cleaning personnel are issues that need to be considered. The following are:
When wiping or damp cloth, wipe with a soft clean cloth, do not wipe with corrosive solvents or hard objects;
When the radiation intensity is less than 200W/m2, the photovoltaic module should be cleaned, and the liquid with a large temperature difference between the module and the module should not be used to clean the module;
The wind power exceeds level 4, and it is forbidden to clean photovoltaic modules in severe weather such as heavy rain and heavy snow.