Frequently Asked Questions

  • What is the benefit of sensors and monitoring for solar PV plants?Read More

    PV monitoring helps to monitor the power production and immediately informs the operator when any fault happens at site. In conjunction with sensors, you can see the expected production and actual production on same screen and look for possible reasons of power losses and less performance ratio (PR).

  • What are the standards related to solar sensors and monitoring?Read More

    IEC 61724 “Photovoltaic System Performance Monitoring – Guidelines for measurement data exchange and analysis” ASTM E1036 “Standard Test Methods for Electrical Performance of Nonconcentrator Terrestrial Photovoltaic Modules and Arrays Using Reference Cells” Read more in NREL 50643 Monitoring System Performance

  • Which meteorological sensors are needed for solar PV plants?Read More

    As per IEC 61724 following meteorological sensors are needed: – Total irradiance, in the plane of the array – Ambient air temperature – Module temperature – Wind speed Read more in NREL 50643 Monitoring System Performance

  • Pyranometers and Reference Cells, What’s the Difference?Read More

    Read in NREL 54498 Pyranometers And Reference Cells

  • Pyranometers or Reference Cells: Which Makes Sense for PV Plants?Read More

    Read in NREL Pyranometer Or Reference Cells – What Makes the Most Sense for PV Power Plants?

  • What is the effect of weather on Performance ratio (PR)?Read More

    Read in NREL 57991 Weather-Corrected Performance Ratio

  • Which type of ambient temperature sensors are available?Read More

    There are PT100, PT1000, DS18B20 ambient temperature sensors with many signal outputs like 4-20mA, 0-10V, Modbus RTU etc. Please see our catalogues for more details.

  • Which dataloggers are compatible with SEVEN Sensor Box?Read More

    Huawei Smartlogger 1000, Smartlogger 2000, Goodwe EzLogger Pro, Impetus, Meier and any Modbus RTU datalogger can be used with SEVEN Sensor Box. For analog sensors like PT100/1000, 4-20mA or 0-10V signal output, compatibility is not a question and this type of sensors will work with any datalogger having analog input e.g. Huawei Smartlogger 2000.

  • Why to buy solar sensors from SEVEN Solar?Read More

    SEVEN Solar provides good quality products made in Germany, Turkey and other European countries. Also, we provide after sales support like remote setup, commissioning, installation and training at site services. Our engineers speak in English, Spanish, French, Turkish or Arabic.