Sunmeter Pro Sunspec – Photovoltaic Pyranometer

Last update

The SUNMETER PRO SUNSPEC is based on Sunmeter PRO, a digital photovoltaic pyranometer for calculating photovoltaic performance with a high degree of precision and reliability. This SUNMETER also has a SUNSPEC prescribed Modbus mapping. Like the Sunmeter PRO, the PRO SUNSPEC has a cell laminated in glass that increases the durability and stability of measurements over time; the microprismatic glass is the same glass used in photovoltaic modules. This pyranometer, thanks to a precise production process, has a performance decline of less than 1.5% per year. Sunmeter - power socket Sunmeter PRO SUNSPEC is equipped with an FW capable of managing the SUNSPEC mapping present in many recent generation inverters. Sunmeter PRO SUNSPEC has all the E.M.C certifications and is Fimer Power-One approved. The FIMER ordering code is: YCU.00198 (SM1 – 485 PRO), while for the kit version with temperature sensor module it is: ycu.00200 (SM1 – 485 PRO kit). Below is a list of compatible FIMER inverters.
Inverter model Power Compatibility
PVS 20/30/33-TL 20,30 e 33 kW Plug&Play
PVS 50/60-TL 50 e 60 kW Plug&Play
PVS 100/120-TL 100 e 120 kW Plug&Play
PVS 175-TL 175 kW Plug&Play
UNO DM xxx Various Via datalogger VSN700 03/05
TRIO nnn Various Via datalogger VSN700 03/05
REACT1 and REACT2 Various Via datalogger VSN700 03/05
Note: the terms irradiance sensor, photovoltaic pyranometer, reference cell and solarimeter are interchangeable. On this site we will use photovoltaic pyranometer. To learn more click here.

Key features

  • Microprismatic front glass for photovoltaic modules
  • Monocrystalline silicon cell
  • Inbuilt TZOS® technology for measurement
  • IEC 60904-2 compliant, RS485 standard Modbus RTU for reliable signals up to 500m from the datalogger
  • IEC EN 61724-1:2017  compliant (standard for PV Monitoring Sistems)
  • Uses temperature compensation for more accurate reading.
  • Performance decline of less than 1.5% per year.
  • Separation between sensors and electronic board
  • Higher weather resistance.
  • IEC EN 61215 par.10,11,12 compliant (product aging).
  • Fixing brackets for easy installation.
  • Accurate calibration with primary calibrated regularly at Accredited Institute IEC 60904-4
  • High calibration of temperature data for an error less than 1%
  • FREE 12 month recalibration service included.
The technological improvements aim to extend the product useful lifespan to at least 7-8 years.


PRODUCT Digital Solarimeter
REFERENCE STANDARDS IEC 60904-2; 60904-4; 60904-10, EN 61215
Calibration Made through a double adjustment for comparison with a reference silicon cell calibrated by the Dakks accredited ISFH Institute.
Input range Irradiance: 0 ÷ 1500 W/m(IEC EN 61724-1:2017 compliant)  
Spectral range 0,3 μm ÷ 1,1 μm
Temperature -30÷ +90 °C (with external PT100)
Output Voltage(1) 0 ÷ 10 V, 0 ÷ 5 V (optional kit for 0 – 40 mV)
Current(1) 0÷ 20 mA, 4÷ 20 mA
Digital RS485 standard Modbus RTU
Output precision Irradiance <± 2%
Temperature ≤± 0,5°C
Supply 9 ÷ 30 Vdc protected against reverse polarity and short circuiting
Encapsulation Laminated with glass for photovoltaic modules, E.V.A. UV resistant (see IEC 60904-2)
Casing Aluminum with screw-clamp for mounting
Wire 50cm with UV-resistant casing
Connectors Male M12 8 IP67; Female M8 3 pin IP67
Dimensions 114x70x22mm without the fixing clamp
(1) Output: Digital RS485 always present with six cables n # 4 and n # 5. Cable # 6 can be configured for both current and voltage output
(2) Recalibration service is included in the price, recommended after the first 12-18 months


  • USB/RS485 interface cable

  • USB/MICRO-USB smartphone adapter

  • Sm configuration for Android smartphone and tablet

    SMCONFIG allows you to configure Sunmeter in the field from your Android smartphone. It is no longer necessary to bring the Sunmeter back to the laboratory for configuration. The software allows you to:
    • configure Sunmeter.
    • make a diagnosis of the basic functions.
    • log irradiance, temperature and wind (Sunmeter Wind only) readings.
    The software is available for free on this page in the downloads area. In the Download area you can also find a wiring diagram for building the cable between the Tablet and Sunmeter and a 9V battery. In addition to the software it is necessary to have a USB / RS485 converter, an adapter cable between micro USB and USB and a female connector for Sunmeter. Alternatively, you can purchase a cable from Soluzione Solare, eliminating the need for a 9V battery as it takes and transforms the voltage present on the USB.

Protection against lightening

Protects irradiance sensors and photovoltaic monitoring equipment from lightening induced overvoltages. Discover Blitz-Wall!


Drop us a line for free and impartial advice from highly experienced professionals.