IRR1-SOL Solar Irradiance Meter helps troubleshooting of photovoltaic installations

IRR1-SOL Solar Irradiance Meter helps troubleshooting of photovoltaic installations

Fluke’s IRR1-SOL solar irradiance meter is designed to simplify the installation and troubleshooting of photovoltaic arrays in a single handheld tool

Solar energy converts the sun’s energy into electricity; solar technology is improving with costs of going solar decreasing rapidly. Fluke’s IRR1-SOL solar irradiance meter provides industrial, residential and commercial installation and maintenance professionals with a single handheld tool designed to simplify the installation, commissioning, and troubleshooting of photovoltaic arrays, measuring irradiance, temperature, inclination, and direction of the solar array.

The simple user interface, instantaneous solar irradiation measurements, and built-in temperature sensor make it easy to meet the IEC62446-1 requirements for testing, documenting, and maintaining photovoltaic systems.

The meter can measure irradiance by simply placing the meter directly onto the PV panel. The integrated compass and inclination sensor also allows quick measurement and documentation of roof and site orientation, pitch, and panel tilt, while surveying, installing, or adjusting an installation.

  • Optimizes placement on solar power systems and verifies window efficiency
  • Measures solar output used to calculate overall energy efficiency and placement of solar systems


  • Measure solar irradiance, ambient and PV module temperature, array orientation, and tilt angles
  • Make instantaneous measurements to determine the watts per square meter solar irradiation required by IEC 62446-1 standard
  • High contrast LCD with large numbers for easy readability in direct

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Mike is the founder and editor of, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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