What do I do when error code 409 occurs?

Error code 409 indicates that the voltage in one or more strings is too high. When there is an alert for 409, the installer needs to check the voltage in the strings and ensure compliance with the datasheet and manual requirements.

If the voltage is within the approved range, a software update can often solve the problem in most cases. Please contact our Growatt support at growatt@aprilice.se for further help.