The following video demonstrates the exact timing and switch operations required for a successful manual reset:
A: According to user experiences, a password reset does affect the core inverter parameters. Only the Wi‑Fi connection settings may need to be re‑entered (router name and password). Your production data, grid code settings, and other operating parameters remain intact.
If your residential ecosystem includes a connected energy storage system (e.g., LUNA2000 battery), switch the physical .
Key lessons from Luca’s day:
Choose the role. The default password is often 00000a (five zeros and a lowercase 'a'). Follow the prompts to set a new password immediately. Important Tips
⚠️ This clears:
| Method | Best for | Difficulty | Password recovery time | |--------|----------|------------|------------------------| | LCD soft reset | KTL-L1, M0 series | Easy | 2 min | | Dip switch reset | M series (commercial) | Moderate | 10 min | | SD card param file | Older locked units | Advanced | 15 min | | Huawei support ticket | Newest firmware | Professional | 24–48 hrs | huawei+sun2000+reset+installer+password+work
Resetting is best done in the morning or at night when solar irradiance is low to ensure the DC side doesn't fluctuate during the cycle. Huawei Technical Support Key Features of the Reset Process Resetting Password - SUN2000-(2KTL-6KTL)-L1 User Manual
While the methods above work for the majority of SUN2000, specific older or specialized models might have slight variations in the timing, so consulting the exact user manual is always recommended. Conclusion Regaining access to your Huawei SUN2000 inverter
Attempting random passwords too many times will lock the login interface for 15–60 minutes. The following video demonstrates the exact timing and
Because these smart inverters do not feature a physical reset button for security reasons, resetting the device requires direct physical access to the electrical breakers and the Huawei FusionSolar App
: Switch both the AC and DC switches back to the ON position. Step 3: Confirm Successful Hardware Reset
: On the login screen, select Installer and tap "Forgot password?" . If your residential ecosystem includes a connected energy
: Connect to the inverter's built-in WLAN. The default installer password is now Troubleshooting "Not Working" Issues