What is soiling monitoring dust IQ?

With the growing global demand for clean energy, photovoltaic (PV) power generation, as a clean and renewable energy source, has attracted widespread attention. However, dust accumulation on the surface of photovoltaic modules can significantly reduce the photoelectric conversion efficiency of solar cells, resulting in decreased power generation. Traditional dust monitoring methods mainly rely on periodic manual inspections, which are inefficient, costly, and incapable of providing real-time monitoring.The Test System for Dusting Solar Cell Modules has emerged to address these challenges. By integrating advanced sensor technologies and data analysis algorithms, this system enables real-time and accurate monitoring of dust accumulation on photovoltaic modules, providing reliable support for the cleaning and maintenance of photovoltaic power plants.This article will introduce this equipment from the following aspects, with the aim of helping readers gain a better understanding of its functions, advantages, and applications.

Impact of Dust on Solar Power Generation

As everyone knows, when dust covers photovoltaic (PV) modules, it creates a shading effect that directly reduces the power output of the modules. In addition, long-term dust adhesion can have a certain corrosive effect on the modules. At the same time, persistent dust accumulation can cause hot spots on the modules, further reducing output power and even affecting the service life of the modules. Moreover, the hot spot effect is irreversible for PV modules; once it occurs, there is no remedy other than replacing the affected module. Otherwise, it will not only reduce power generation but may also pose safety risks to the power plant. The impact of dust on photovoltaic power generation can be summarized in the following three aspects:

1. Temperature effect

At present, most photovoltaic power plants use silicon-based solar cell modules, which are highly sensitive to temperature. As dust accumulates on the surface of the module, it increases the thermal resistance and acts as an insulating layer, thereby affecting heat dissipation. Studies have shown that for every 1°C increase in solar cell temperature, the output power decreases by approximately 0.5%. Under prolonged sunlight exposure, the shaded areas of the cell heat up much faster than the unshaded areas, leading to excessively high temperatures and the formation of dark burn marks.

Under normal irradiance conditions, the shaded portion of the solar panel may change from a power-generating unit into a power-consuming unit. The shaded photovoltaic cells become non-generating load resistors, consuming the electricity produced by connected cells, which manifests as heat—this is known as the hot spot effect. This process accelerates panel aging, reduces output, and in severe cases may cause module burn-out.

2. Shading effect

Dust adhering to the surface of solar panels blocks, absorbs, and reflects incoming light, with shading being the dominant effect. Dust particles affect the absorption of light by photovoltaic panels through reflection, absorption, and obstruction, thereby reducing conversion efficiency.

Studies indicate that dust deposition on the illuminated surface of PV modules first reduces the surface transmittance of the panel. Secondly, it changes the incident angle of some light rays, causing uneven light propagation within the glass cover. Research has shown that under the same conditions, clean PV modules can generate at least 5% more output power than dust-covered ones, and the higher the dust accumulation, the greater the decline in performance.

3. Corrosion effect

The surface of most photovoltaic panels is made of glass, whose main components include silicon dioxide and limestone. When moist acidic or alkaline dust adheres to the glass cover, it can react with the components of the glass.

As the exposure time in acidic or alkaline environments increases, the glass surface is gradually eroded, forming pitted and uneven textures. This causes diffuse reflection of light on the glass surface and disrupts the uniform transmission of light within the cover. The rougher the PV module surface becomes, the lower the energy of refracted light reaching the solar cell, resulting in reduced power generation.

In addition, rough and sticky surfaces with adhesive residues tend to accumulate dust more easily. Moreover, dust itself can attract additional dust; once initial particles are present, further accumulation is accelerated, which further speeds up the degradation of photovoltaic power output.

Composition of a Solar Module Dust Accumulation Testing System

A complete solar module dust monitoring system is typically composed of four layers: the sensing layer, the transmission layer, the platform layer, and the application layer.

The sensing layer is responsible for data acquisition, including various dust sensors and meteorological sensors. Taking the HGQ-TC1 dust accumulation sensor from Huiyang Zhilian as an example, it is based on the optical scattering principle and can measure multiple parameters such as dust pollution ratio, as well as detect icing, frost, dew, and snowfall. It can also distinguish between uniform and non-uniform dust accumulation.

The transmission layer is responsible for reliable data uploading. It usually adopts wired or wireless communication methods to transmit the data collected by the sensing layer to the monitoring platform.

The platform layer serves as the “brain” of the system, responsible for data storage, processing, and analysis. The platform of Huiyang Zhilian’s photovoltaic module dust monitoring system integrates big data analytics capabilities, enabling it to extract valuable insights from large volumes of monitoring data and support operation and maintenance (O&M) decision-making.

The application layer directly serves end users by providing functions such as cleaning alerts, power generation loss assessment, and cleaning priority ranking. When the dust accumulation index reaches a preset safety threshold, the system automatically triggers an alarm, promptly notifying the O&M team of the photovoltaic power plant.

Functions and Advantages of a Solar Module Dust Accumulation Testing System

Real-time monitoring and data visualization

Users can view key indicators such as dust coverage rate and power generation loss rate in real time through a local display screen or cloud platform. The system also generates historical data curves and supports multi-dimensional comparative analysis.

Optimized cleaning management

By integrating meteorological data, the system recommends the optimal cleaning time, avoiding unnecessary cleaning operations and reducing resource waste. It can also be linked with automated cleaning equipment (such as cleaning robots and sprinkler systems) to enable intelligent operation and maintenance.

O&M cost control

The system reduces the frequency of manual inspections and lowers labor costs. At the same time, precise cleaning strategies help extend the service life of PV modules and improve overall power generation revenue.

Comparison of Intelligent Dust Monitoring System and Traditional Monitoring Methods

Comparison with Traditional Methods

Traditional dust monitoring methods have the following limitations:

Low efficiency: Manual inspections are time-consuming and labor-intensive, making it difficult to cover large-scale photovoltaic power plants.

High cost: Labor costs and transportation expenses result in consistently high monitoring costs.

Inaccurate data: Manual judgment is highly subjective, making it difficult to ensure data accuracy.

Poor real-time performance: Manual inspections cannot achieve real-time monitoring of dust accumulation conditions.

In contrast, our intelligent dust monitoring system offers the following advantages:

High efficiency: Automated monitoring significantly improves overall inspection efficiency.

Low cost: After initial investment, long-term operating costs are relatively low.

Accurate data: Sensor-based data is reliable and enables quantitative analysis.

Strong real-time capability: Enables 24-hour continuous monitoring, allowing timely detection of dust accumulation issues.

Technical Features of the Solar Module Dust Accumulation Testing System

Real-time data monitoring

The system can collect and analyze four key parameters: pollution ratio, cleanliness ratio, dust thickness, and backsheet temperature. The pollution ratio and cleanliness ratio are calculated using a dual-probe averaging data model, ensuring high accuracy and reliability.

Advanced data acquisition unit

The dust environment data acquisition device adopts a new-generation 32-bit MCU processor and integrates high-precision 4G and Bluetooth digital chips on board. This enables data transmission to the monitoring platform via either wired or wireless communication.

Innovative blue-light technology

The system adopts a new-generation Blue-Light Pollution Closed-Loop Measurement (OMBP) technology, which ensures high-precision dust detection and effectively eliminates interference from sunlight on optical closed-loop data acquisition. It supports all-weather long-term operation and outperforms the IEC 61724-1 standard, which limits effective monitoring to only three hours per day (11:00–13:00).

Smart power plant cleaning management

The built-in IoT control module offers four operation modes: normally open/closed, cyclic control, time-based control, and manual control. Based on preset pollution thresholds and control modes, the system can be linked with cleaning robots or IoT control devices to automatically clean PV module surfaces, ensuring efficient power plant operation.

Automatic accuracy self-calibration

The device integrates a one-touch calibration function. Since measurement accuracy may decline over time and under different environmental conditions, the self-calibration function automatically recalibrates the blue-light monitoring circuit to ensure consistent and reliable data accuracy.

Green power management system

The data acquisition unit supports both AC 220V and DC 12V power supply modes. It also integrates a new-generation green power management module that enables intelligent switching between AC and DC power sources, ensuring stable and energy-efficient operation.

Significance of the Solar Module Dust Accumulation Testing System

The solar dust monitoring instrument plays a crucial role in photovoltaic (PV) power plants. It can continuously monitor dust accumulation on the surface of solar modules and, through accurate data analysis, provide cleaning recommendations for operation and maintenance (O&M) teams.

According to research, dust deposition can significantly reduce the power generation efficiency of PV modules, in some cases by up to 30%. Timely cleaning not only helps maintain optimal system performance but also contributes to extending the service life of the equipment. At the same time, the application of this technology enables photovoltaic power plants to manage resources more effectively and improve the overall economic efficiency of solar power generation. Early detection of issues and prompt action are essential for ensuring the efficient utilization of renewable energy.

To achieve efficient and sustainable power generation, the solar dust monitoring instrument has undoubtedly become an indispensable tool. It enables real-time and accurate monitoring of dust accumulation on PV module surfaces, helping O&M personnel carry out timely cleaning and maintenance, thereby ensuring the efficiency and long-term stable operation of photovoltaic systems.We sincerely invite interested readers to leave a message or contact us directly so that we can provide more detailed product technical information, application solutions, and related service support.