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 sunlight High precision mono-crystalline solar sensor " instantaneous irradiance measurements up to 1400 W/m" Integrated compass " measure and document roof or site orientation Inclination sensor " know roof and PV panel tilt when surveying, installing, or adjusting the installation