Precise Recording of Power Production Values


Sensor Box Professional Plus

Sensor Box Professional

Ambient temperature sensor

Wind sensor


Irradiation sensor specifically designed for large-scale PV plants

Sensor Box Professional and Professional Plus

Sensors precisely record the deviations between the possible and the actual power production and provide important key figures in regard to the quality of the entire plant. An error message is generated when a deviation is detected. The irradiation sensor is the most important element of the Sensor Box Professional and Professional Plus. It provides a reference value for the amount of solar irradiation that can be used to to evaluate the potential power production.  Power reductions are easier to analyze with the internal cell temperature sensor. The sensor evaluation provides indications of the cause of the fault. Up to nine Sensor Boxes Professional and Professional Plus can be connected. It is possible to use the Sensor Boxes with their own RS485 inverters on the same bus the Solar-Log™. The Sensor Box Professional Plus also has the option to connect an ambient temperature sensor and window sensor.

Technical dataSensor Box ProfessionalSensor Box Professional Plus
Solar cell, laminated inside glassMono crystalline silicon (5 cm x 3.3 cm)

Dimensions (w x h x d) in mm, weight155 x 85 x 40; approx. 360 g

HousingPowder-coated aluminum

protection modeIP65
operating temperature-35 °C to +80 °C-35 °C to +80 °C
Power supplyVia RS485-data cable from Solar-Log™, no additional power supply required

Supply CurrentTypical 80 mATypical 80 mA
Communication PortRS485RS485
ProtocolSolar-Log™, 9600 Baud, 8N1Solar-Log™, 9600 Baud, 8N1
Measurement uncertaintyRadiation strength: 5 W/m2 ± 2.5 % of the measured value
(0 W/m2 bis 1400 W/m2)
cell-temperature: ± 1K (-40 °C to +85 °C)

InstallationSame orientation and pitch as the PV generator

Connection cable4-pole, 3 m, weather and UV resistant (LiYC11Y(4 x 0.14) prolongable up to 50 m (0.14 mm2)

ConformityCE in accordiance with DIN EN-61000-6-1:2007 and DIN EN-61000-6-3:2007

Wind sensor-
Ambient temperature sensor-
CompatibilitySolar-Log 250, 300, 1200, 1900 and 2000Solar-Log 250, 300, 1200, 1900 and 2000
Warranty2 years2 years

Ambient temperature and wind sensor

Sensor Box Professional Plus accessories

The ambient temperature sensor (PT1000) provides additional information on power generation. One problem that could arise and contribute to decreased yields is that the combination of cold temperatures and sunshine causes a buildup of ice. Such problems are easily detected when a sensor is being used. In addition to this, wind speeds can be tracked with a wind sensor and identified much better as possible causes for breakdowns, power reductions or power losses.

Precise measurements of irradiance

Weather Station with a Pyranometer

The Weather Station with integrated CMP3 pyranometer provides information on air pressure, wind direction, wind strength, humidity and the local solar irradiation. The local measured values give information on how weather influences the PV plant’s output. This data is available in the Solar-Log WEB Enerest™ XL portal.

MeasurementMeasuring RangeMeasuring Method
Pyranometer1400 W/m2; spectral range
(50 %): 300 – 2800 mm
Kipp & Zonen CMP3
Ambient temperature-50 °C – +60 °CNTC
Air pressure
0 – 100 %,
300 – 1200 hPa
Capacitive, MEMS capacitive
Wind direction,
Wind speed
0 – 359,9 °,
0 – 75 m/s

Technical data
Power supply24 Vdc +/- 10 %
Power consumption20 VA at 24 V
Connection, Protection class RS485, IP66
Dimensions in mmDiameter: 150, Height: 332, Weight: 1.5 kg 
CompatibilitySolar-Log 300, 1200, 1900 and 2000
Warranty2 years
Article numberon request
Compatible pyranometer typesWS 301 UMB, WS 501 UMB