RT1 Smart Rooftop Monitoring System

  • ISO 9060 Class C 
  • Designed for rooftop PV installations
  • Fits to a corner of any solar panel
  • Smart digital duo-sensor
  • Irradiance and back panel temperature
  • Recalibration not needed for 2 years
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RT1 Smart Rooftop Monitoring System

For the best commercial rooftop PV monitoring it is advised to measure both the solar irradiation and the PV panel temperature.

PV panel temperature has a significant influence on the output of the PV panels and shouldn’t be mixed up with influences of e.g. soiling, cable losses and inverter losses.

The rugged housing of RT1 simply fits to the corner or side of a PV panel and contains the digital electronics. It also houses a sensor that reliably measures the incoming plane of array solar irradiance. The plug-in temperature sensor is easily attached to the back of the panel.

RT1 is the perfect solution for monitoring the efficiency of commercial rooftop PV installations and is also suitable for small-scale ground and floating solar installations where IEC 61724-1 Class C (basic accuracy) monitoring of POA irradiance is required.

Watch this video to see how the RT1 is installed using the included mounting plate when the corner is not an option. Still easily and quickly.


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Irradiance 0 to 2000 W/m²
Resolution W/m2 1 W/m2
Spectral range (overall) 400 to 1100 nm
Non-stability (change/year) < 1 %
Non-linearity (0 to 100 W/m²) < 1 %
Operating temperature -40 to +80 °C
Classification to ISO 9060:2018 Class C
PV panel temperature -20 to +100 °C, ± 1 °C
Input ranges 5 to 30 VDC
Power consumption 60 mW



Accessory Description
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LOGBOX SE is a weatherproof field data logger with 4G LTE cellular communication. Designed for use with all Kipp & Zonen solar radiation instruments, both analog and Modbus®, including RT1. It is also compatible with DustIQ and Lufft all-in-one weather stations. LOGBOX SE can operate from internal batteries, external DC power or a solar panel. Add To Basket