Hi everyone,

I'm fairly new to solar and recently got a basic setup installed at home (5kW inverter with 4.8kWh lithium battery and 6 panels). Everything seems to be working fine, but I’ve noticed that my inverter makes a faint humming or buzzing noise, especially during the day when it’s sunny.

It’s not loud or disruptive, just something I noticed because the inverter is mounted inside my garage. I asked the installer, and he said it’s normal, but I just wanted to check with the community here — is this humming sound common with inverters? Or could it be a sign of something wrong?

Also, is it normal for the sound to get a bit louder when the solar production is at its peak?

Thanks in advance!
Looking forward to learning more from you all as I go deeper into this solar journey. 🌞

Fan noise?

Yeah, a faint humming or buzzing sound from the inverter is pretty normal especially when it's under load during peak solar generation.

Inductor Noise – Inverters use high-frequency switching to convert DC to AC, and the coils inside can vibrate slightly, causing a hum.

The fan should be running at peak solar production so the humming should not be audible when the fans are running.

Edited March 24, 20251 yr by TaliaB
Added text

On 2025/03/24 at 10:37 AM, TaliaB said:

Yeah, a faint humming or buzzing sound from the inverter is pretty normal especially when it's under load during peak solar generation.

Inductor Noise – Inverters use high-frequency switching to convert DC to AC, and the coils inside can vibrate slightly, causing a hum.

The fan should be running at peak solar production so the humming should not be audible when the fans are running.

Thanks