Solar Testing Torque Testing Technicians use calibrated torque wrenches to measure and apply the correct amount of rotational force to fasteners View More IV Curve Testing An IV curve (current-voltage curve) graphically represents the relationship between the current and voltage output of a solar panel or string of panels. View More EL & Flash Testing This test simulates sunlight by flashing a high-intensity light onto a solar panel and measuring its electrical output. View More