To reset the installer password for a Huawei SUN2000 inverter, you must perform a specific power-cycle sequence involving both the AC and DC switches. This process triggers a temporary window where the initial password can be used to log in and set a new one.
: The inverter indicators should be steady green or blinking slowly for at least 3 minutes before you begin the power-cycle sequence.
: Turn the switches back on, wait 90 seconds for slow green blinking, then turn them off again until LEDs are off.