Some inverters produce a faint humming sound, especially during peak hours. This is normal and is caused by:

• Cooling fans – To prevent overheating.
• Electronic components – Which can cause high-frequency vibrations.

However, loud or irregular noises may indicate a problem:

• Constant loud noise → Possible overheating or wear and tear of components.
• Clicking sounds → Relays switching on and off, which often occurs in the event of a defect.
• Sudden increase in noise → Possible malfunction or defective fan.

In these cases, it is wise to have an installer perform a check or repair.