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 0,001
Uncertainty ≤1%
Irradiance 0…1600 W/m²
Followed Standard IEC61724-1 (Annex C)
Data Output RS485 up to 38400 Baud
Communication Protocol Modbus RTU
Output Rate 1/s
Operating Temperature Range -40°C to +85°C
Operating Humidity Range 0 to 100% RH
Power Supply 220 VAC (24 VDC-5A option is available)
Power Consumption 20 mA @ 24 V DC When the pump is active
3 mA @ 24 V DC When the pump is active
Electrical Connection 3 m LIYYC11Y PUR Cable, UV and weather resistant
Galvanic Isolation 1000 V between power supply and RS485 Bus
IP Rating IP 65
Weight 10.5 kg
Calibration Each sensor is calibrated and normalized under Class AAA Sun Similator as per IEC 60904-2 by using a reference cell calibrated by ISFH-Germany
Test Each sensor is tested under natural sunlight by using a calibrated reference cell from Fraunhofer ISE, Germany.)
Water Tank Capacity 18 Liter
Water Consumption 36lt/year (2 times filling per year)
Cleaning Fluid 100% Pure Water when the ambient temperature is above 0°C
65% Pure Water + 35% Antifreeze when the ambient temperature is below 0°C
Max. Water Line Length 20 Meter
Max. Water Line Height 5 Meter

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.