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Automatic Soiling Sensor
SEVEN Soiling Sensor is designed to measure the loss of energy production due to soiling caused by environmental
factors on photovoltaic panels. The Soiling sensor, which is suitable for commercial, utility, industrial and rooftop projects,
notifies the user of production losses due to soiling. If soiling ratio read from the sensor is 10%, it means that there is
10% energy loss in the facility.
Category: Soiling Sensor
DESCRIPTION
SEVEN Soiling Sensor calculates the soiling rate of the PV system by comparing the irradiance values received from
two clean and dirty irradiance sensors. While the dirty irradiance sensor in the system is exposed to soiling in the same
way as the panels, the clean irradiance sensor is automatically cleaned every day. Monitoring systems give the user the
energy loss by comparing the two irradiance values according to the data received from the cleaned and dirty irradiance
sensors.
TECHNICAL DATA
| Item Code | 3S-SMS-MB |
| Soiling Ratio | 0% – 100% |
| Resolution | 0,1 |
| Uncertainty | ≤1% |
| Data Output | RS485 up to 38400 Baud |
| Communication Protocol | Modbus RTU |
| Output Rate | 1/s |
| Operating Temperature Range | -20°C … +85°C |
| Operating Humidity Range | 0 to 100% RH |
| Power Supply | 110-240V AC or 24V 5A DC |
| Power Consumption | 20 mA @ 24 V DC When the pump is passive |
| 3 A @ 24 V DC When the pump is active | |
| Electrical Connection | 3 m LI2Y(st)C11Y PUR Cable (UV and weather-resistant) |
| Galvanic Isolation | 1000 V between power supply and RS485 Bus |
| Water Tank Capacity | 18 Liter |
| Water Consumption | 36lt/year (2 times filling per year) |
| Washing Liquid | 100% Pure Water when the ambient temperature is above 0°C |
| 65% Pure Water + 35% Antifreeze when the ambient temperature is below 0°C | |
| Water Hose Length | 5 m (on request up to 20m) |
| Max. Water Line Height | 5 m |
| IP Rating | IP54 (Optional IP65) |
| Weight | 10.5 kg |
| Followed Standard | IEC61724-1 (Annex C) |
The system consumes approx. 100 mililiter water for single run for 2,5 meters water hose length. The water tank is able to serve 400 days (13.3 months). Consult SEVEN if the water hose longer than 2,5 meters.