The Megger PVM210 irradiance meter is a solar detector and meter housed in one compact unit, ideal for working on a sloping roof or at the top of a ladder. With the easy to read display and measurement hold feature the meter gives fast, accurate readings of solar power for initially choosing optimum position for the photovoltaic panel. In addition this meter can provide the vital measurement for the calculation of short circuit current in conjunction with a suitable ammeter to verify the stated short circuit current provided by the manufacturer of the panel.