After repairing inverters from hundreds of plants, we see the same root causes again and again. Most are preventable.
1. Heat
Electronic component life drops sharply at high temperatures. Inverters in direct sun or enclosed rooms age fastest.
2. Dust
Dust clogs heat sinks and fans, raising internal temperature.
3. Voltage surges and lightning
Without proper SPDs and earthing, surges damage input stages and communication boards.
4. Moisture
Water ingress and condensation cause isolation faults and corrosion on PCBs.
5. Poor installation
Loose terminals, undersized cables and wrong string design cause overheating and stress.
6. Ageing capacitors and fans
Electrolytic capacitors and fans are wear parts that need timely replacement.
7. Grid instability
Frequent high voltage and fluctuations stress relays and power stages.
8. Ignored early faults
Running an inverter with recurring errors often turns a small fault into a major failure.
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