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ECTIVE MSP & SSP
5. Troubleshooting and Maintenance
5.1 Defective Bypass Diodes
Shaded solar cells can cause high reverse currents, causing the affected
cells to heat up strongly. To protect the solar modules from damage in
such cases, they have bypass diodes. If one of these diodes fails, you must
replace it. By stating the serial number of your module, you can request the
appropriate diode type from ECTIVE.
5.2 Low Voltage
Excessive low voltage may be caused by faulty terminations or defective
bypass diodes.
• Check all cable connections to ensure that they are connected
correctly.
• Measure the open circuit voltage at each module.
• Cover all modules with an opaque material.
• Disconnect both terminals on the module under test, remove the cover
on that module, and measure the open circuit voltage at the terminals.
• If the voltage is only half the nominal voltage, the bypass diode is
defective.
• If the voltage between both terminals deviates by more than 5 %,
there is a faulty connection.
5.3 Maintenance
We recommend the following measures for regular maintenance of your
ECTIVE Solar modules:
• Remove dirt from the glass surfaces with water and a soft cloth or
sponge. Do not use any abrasive cleaning solutions.
