The inverter was left on default setting. Get the installer to change it up to 253 volts.

i have seen this once.

The manual available that i saw on the intenet didn't have details about changing settings

The inverter was left on default setting. Get the installer to change it up to 253 volts.

i have seen this once.

If you want to look for,the setting yourself, The button press styles and description are below.

Single touch - Switch display or Number +1

Double touch - Enter or confirmation

Three touch - Previous menu

Hold 5s - Confirm country or recover default value