Many guides skip this, but you must attempt the "Forgot Password" flow inside the or Inverter WebUI before trying hard resets.
If the defaults fail, follow this procedure to reset the password to 00000 :
: On some newer models, the reset also requires you to be within a certain distance of the inverter to verify physical proximity via the app. default WLAN name and password for your specific inverter model to help you reconnect?
Wait until every active LED indicator on the interface panel . Step 4: Final Power-Up Activation Turn the AC switch ON and flip the DC Switch to ON . huawei+sun2000+reset+installer+password+work
the AC and DC switches and wait for all LED indicators to turn off.
– Make sure both the AC and DC sides of the inverter are powered on. Wait until the inverter panel indicators are steady green or blinking slowly at long intervals for more than 3 minutes. In some Chinese documentation this is referred to as waiting for the indicators to be in a "green slow‑flash state".
Phase 2: The Physical Hardware Reset Sequence (AC/DC Power Cycle) Many guides skip this, but you must attempt
Watch the LEDs: They will blink in a specific sequence (Solid on -> Rapid blinking -> Slow blinking).
Connect to the inverter's WLAN using the credentials on the unit label. Device Commissioning in the app and log in as Follow the prompts to define a new password. 4. Troubleshooting and Tips Verification:
Losing access to your solar inverter's installer settings is a common headache, especially if your original installer is no longer available. Fortunately, Huawei has built-in safety procedures to let you regain control. Wait until every active LED indicator on the interface panel
Attempting random passwords too many times will lock the login interface for 15–60 minutes.
: The most common reason the reset "doesn't work" is timing. The cycles must be performed quickly enough to stay within the 4-minute window, but you must wait for the LEDs to actually start blinking before turning the switch off again. FusionSolar
👍 Found this helpful? Save it for your next service call. #HuaweiSolar #SUN2000 #SolarInstallers #TechTip
This exact timing sequence triggers an internal hardware interrupt on the inverter's control board, forcing it to reset local login parameters back to factory defaults without erasing your historical solar production data.
Note: You may need to repeat the off-on sequence multiple times if the first attempt fails. 3. Local Commissioning & New Password Setup Open the FusionSolar App.