The Importance of Timing: When to Clean Your Solar Panels for Optimal Performance | PBOX

The Importance of Timing: When to Clean Your Solar Panels for Optimal Performance

clean solar panels

1. Why we need to clean solar panels

1.1 Influence of power generation efficiency

Solar panels are devices that absorb sunlight and convert solar radiation directly or indirectly into electrical energy through the photoelectric or photochemical effect. The service life of solar panels is determined by the material of the cells, tempered glass, EVA, TPT etc. In general, the power will decay by 30% in 20 years and by 70% in 25 years.

The lifetime of a photovoltaic module is determined by its power generation efficiency. One of the factors that affect the efficiency of solar panels is stains, dust and debris on the surface of solar panels can affect the efficiency of the electricity generated. If we don’t clean solar panels or maintain properly, they will not be as efficient as they were at the beginning, even after only a year or two.

1.2 Influence of environmental factors

Temperature, the intensity of light radiation, wind and snow and ice load will also affect the battery life. We all know that solar panels are usually installed on top of the caravan, the wind and rain, and long-term exposure to the outdoor environment, dust and debris are inevitably adhered to it, giving it a “thick clothing”, thus leading to a reduction in its power generation efficiency.

In general, manufacturers who use better materials can produce panels with a service life of 25 years, but with the impact of the environment, solar panel materials will age with the change of time.

2. How often to clean solar panels

Regular cleaning of solar panels. Usually, solar panels have a service life of more than 20 years. To ensure that the panels generate electricity normally as well as their service life, it is generally recommended that solar panels should be cleaned 1-2 times every month. The surface of the solar panel is made of high-strength toughened glass, and since it is glass, there is also the problem of wear and tear. In use, the photovoltaic parameters and output power of the solar panels should be tested regularly (e.g. 1 to 2 months). In windy weather, the panels and supports should be inspected with emphasis. Look at the surface to see if there are any coverings. Abnormalities found in time for repair or replacement. The normal operation of the solar panels can be ensured. In general, no need to clean solar panels outside frequently. Because when it rains the panels will be washed. If there is no rain for a longer period of time, resulting in the accumulation of a lot of dust on top of the battery pack. It also has a harmful impact on the service life of the battery. This is why regular cleaning is required.
clean solar panels

3. What to clean solar panels

3.1 Solar panel cleaning robot for solar power plant

Large solar panels, such as large power stations, are better suited to solar panel cleaning machine. If carried out manually, the cleaning solar panels cost can be a lot. And may not be cleaned properly .

An automatic cleaning system for solar panels. The system comprises longitudinal rails fixed to the support structure of the solar panel and located on opposite sides of the solar panel unit being cleaned. As the system moves a cleaning brush moves along the guide rail to clean The surface of the solar panel is kept clean.

In solar power stations, a large number of solar panels are mounted on support bays and arranged in an array configuration. Long rows of solar panels are usually formed in close proximity to each other. Due to environmental changes, dust, sand, snow, plant leaves and other debris can easily contaminate the surface of the solar panels. If a large number of solar panels were to be cleaned or inspected by manual maintenance, it would be very expensive in terms of time and labour.

3.2 Solar panel cleaning brush for home use solar panels


Water-feeding telescopic cleaning brush with its own water dispensing system. Simple to use and easy to clean home use solar panels.The built-in water feed system designed for cleaning provides a long water supply. This is certainly a simple and value for money solution for solar panel users. Makes the solar cleaning process easy.

Brush and pole

Brushes and poles will be the solar panel cleaning tools you rely on. They will allow you to reach the roof from the ground and remain highly secure. For cleaning solar panels, you want to find quality brush heads with two important features.

Soft bristles

To avoid using any abrasive materials, so that scratches that affect performance do not become a factor. Particles and dust are easily and quickly cleaned. Gentle bristles for maximum cleaning without scratching the surface of the solar system.

Flow-through design

In this case, the brush head allows water to flow through the brush head. This flow will allow you to quickly spray the panel, add soap to the water source and rinse the panel after cleaning.

Telescopic ladder

Different types of solar panel cleaning tools. If you choose to manage your cleaning project from the roof, or if the environment does not allow cleaning from the ground, then safety equipment must be considered. Some rooftop units; some have ground level. Some roofs are easily accessible from the ground; others are not. All these factors must be taken into account when planning your cleaning strategy.
Depending on the height of your home, there are several options for finding the right ladder for the job. Ladderssafety equipment must be considered.

clean solar panels

4. Conclusion

Regular cleaning of solar panels helps to maintain its power generation efficiency. Different types of solar panels are suitable for different cleaning tools. Large solar panels are better suited for solar panel cleaning machines. Home solar panels are more hairy and quicker to clean manually by yourself.
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