The reset is triggered by a specific "on-off-on" cycle that must be completed within a strict . Resetting Password - SUN2000-(2KTL-6KTL)-L1 User Manual

This guide details the exact power-cycle sequence required to reset the login password to its factory state for the "Installer" role. Prerequisites for a Successful Reset

The inverter must be connected to both AC and DC power supplies simultaneously.

How to Successfully Reset the Huawei SUN2000 Installer Password