Hioki FT4310 PV Solar Panel Bypass Diode Tester

Hioki FT4310 PV Solar Panel Bypass Diode Tester

Bypass diodes protect solar cells from overheating when partial shading occurs. However, they only jump into action when a panel is shaded, so defective diodes can go undiscovered until it is too late. When a defective bypass diode is unable to prevent a shaded cell from receiving more and more negative voltage, the cells can overheat and cause eventual damage

• Simply set the rotary knob to “BPD TEST” and press the “Measure” button to measure and display all parameters necessary for fault identification (open-circuit voltage, short-circuit current, and bypass route resistance).
• Easily test using the strings in the junction boxes, eliminating the need to climb onto the roof and dramatically improving work efficiency.

Traditionally, bypass diodes can only be inspected for good working condition at night or when power is not being generated
by the solar panels in order to verify that any applied current is guided past the solar cells. With the FT4310, you can detect for open faults even when the sun is out without covering the panels. Testing can also be performed at night.
*Testing for short-circuit faults can only be performed during the day.