What you will see
- Power drops or stops on hot afternoons
- Error 408 in May to August
- Unit hot to the touch from the front
Why it happens
Inverters must cut back when the air around them is hot and still. Many Growatt models cool by natural airflow, so space around them matters.
Diagram
Heat makes the inverter cut back
Shaded, open air
InverterCool
→OutputFull
Direct sun or closed space
InverterToo hot
→OutputReduced or stopped
Many Growatt models cool by natural airflow, so space around them matters.
What you can check yourself
- Check if afternoon sun hits the inverter
- Keep space around it clear
- Wipe dust off with a dry cloth when it is safe
What not to do
- Do not wet or cover the inverter
When to call us
- Fit a shade or relocate
- Check the temperature sensor if it trips when cool
Punjab summers
Summer heat in Faisalabad and Lahore pushes many inverters into derating. We shade and relocate Growatt inverters.
Send us
a photo of the inverter location and the alarm