Contaminants on the glass of solar modules are one of the main problems that quickly affect photovoltaic power plants, reducing power generation efficiency and cost performance.
In recent years, the sharp decline in the production cost of photovoltaic modules and the support of national industrial policies have made photovoltaic power generation quickly become the most potential new energy industry. The power generation efficiency of solar modules is affected by ambient temperature, light intensity, the way cells are interconnected, and dust. Among them, dust has a greater impact on battery components
During the operation of the solar photovoltaic power generation system, it will be affected by dust in the environment in which it is located. The photoelectric conversion efficiency of photovoltaic cells is related to the intensity of solar radiation. Dust accumulation on the surface of the photovoltaic panel will reduce the light transmittance of the front cover glass. The decrease in light transmittance will lead to a decrease in the output performance of the battery. The greater the deposition concentration, the lower the light transmittance. The lower it is, the lower the amount of radiation absorbed by the panel and the greater the degradation in its output performance.
Dust is particulate matter, and its sources are divided into natural sources and man-made sources. Including: fine particles of soil, sand and rocks formed by the action of wind and some biomass of animals and plants.
When dust covers the surface of the photovoltaic module unevenly, the output U-P characteristic curve of the photovoltaic module appears as a multi-peak characteristic curve, which will greatly affect the position of the maximum power point.
In addition, because dust absorbs solar radiation, it can heat up photovoltaic panels, and dust contains some corrosive chemical components, which also reduces its photoelectric conversion efficiency. Therefore, regular cleaning and maintenance of solar cell components is an effective way to quickly improve the power generation efficiency of photovoltaic power stations.
By measuring the proportion of pollutants (SR), it is converted into a loss of power generation in real time. This allows operations personnel to know when contaminants have reached a critical point and it is necessary to start cleaning procedures. The operation and maintenance personnel of the power station no longer need to conduct visual inspection through experience and can scientifically and accurately select the best cleaning solution, thereby avoiding the loss of power generation efficiency and the waste of cleaning costs. Effectively improve the revenue of power stations.
| Parameter name | Parameter description | Mark |
| Soiling ratio (SR) range | Dual sensor value 50~100% | |
| Soiling ratio measuring accuracy | Measuring range:90~100% | Measuring accuracy ±1%+ 1%FS of reading |
| Measuring range:80~90% | Measuring accuracy±3% | |
| Measuring range:50~80% | The measurement accuracy is ±5%, which is processed by internal precision algorithm | |
| Stability | Better than 1% of full range (per year) | |
| Backboard temp sensor | Measuring range:-50~150ºC Accuracy:±0.2ºC resolution:0.1ºC | Optional |
| GPS location | Working voltage:3.3V-5V Working current:40-80mA Location accuracy:The average is 10m, the maximum is 200m. | Optional |
| Output | RS485 Modbus | |
| Linkage output(Passive normally open contact) | Generally used to connect cleaning equipment, relays(Optional) | |
| Alarm threshold | Upper and lower thresholds can be set | |
| Working volatge | DC12V(Allowable voltage range DC 9~30V) | |
| Current range | 70~200mA @DC12V | |
| Max consumption | <2.5W @DC12V | Low consumption design |
| Working temp | -40ºC~+60ºC | |
| Working humidity | 0~90%RH | |
| Weight | 3.5Kg | Net weight |
| size | 900mm*170mm*42mm | Net size |
| Sensor cable length | 20m |
