Frequently Asked Questions

  • What is the benefit of sensors and monitoring for solar PV plants?
    Advantages of solar sensors for monitoring of solar photovoltaic projects. Use irradiance sensor to get Performance Ration (PR) of your PV plant.

    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?PDF
    IEC 61724, ASTM E1036, Fraunhofer ISE, NREL requirements for Photovoltaic System Performance Monitoring Guidelines for measurement data exchange and analysis.

    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”

  • Which meteorological sensors are needed for solar PV plants?PDF
    Radiation sensors, pyranometers, ambient and module temperature sensors, wind speed and direction sensors, weather stations required for solar projects.

    As per IEC 61724 following meteorological sensors are needed:

    – Total irradiance, in the plane of the array
    – Ambient air temperature
    – Module temperature
    – Wind speed

  • Pyranometers and Reference Cells, What’s the Difference?PDF
    Meteorological stations and solar Photovoltaic Systems, which sensor is more economical and convenient for solar PV plants. NREL 54498 file explain in details.
  • Pyranometers or Reference Cells: Which Makes Sense for PV Plants?PDF
    Which sensor makes the most sensor for solar Photovoltaic plants. Pyranometer or reference cells, radiation sensor? Comparison available in NREL file.
  • What is the effect of weather on Performance ratio (PR)?PDF
    Importance of meteorological sensors for calculation of Performance Ratio (PR). What is the effect of weather measured by solar sensors on performance.
  • Which type of ambient temperature sensors are available?
    Solar and industrial standard RTD PT100, PT1000 and Maxim DS18B20 temperature sensors for solar photovoltaic applications. 4-20mA, 0-10V, Modbus RTU output.

    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?
    Seven Solar Sensor Box is compatible with Huawei Smartlogger, Goodwe EzLogger Pro and any Modbus RTU datalogger. Read more in case studies and technical files.

    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?
    We serve economical, robust and good quality solutions with outstanding price-performance ratios. 10 years warranty. Remote setup or installation services.

    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.