The following guide outlines the hardware-based procedure for resetting the installer password for Huawei

series inverters. This process involves a timed sequence of power-cycling the device to trigger a reset mode, allowing for a temporary login to set a new password. 1. Prerequisites for Reset Before beginning, ensure the following conditions are met: Power Supply: The inverter must be connected to both power supplies. Stable State: The DC and AC indicators on the inverter panel must be steady green or blinking slowly for more than FusionSolar app

installed on a mobile device and be within range of the inverter's WLAN. 2. Hardware Reset Procedure (Power Cycling) The following steps must be completed within a window once the power cycling begins:

the AC and DC switches and wait for all LED indicators to turn off.

the AC and DC switches, wait 90 seconds, and ensure indicators blink green slowly.

the AC and DC switches again, waiting until all indicators turn off.

the AC and DC switches and wait for the inverter to restart and indicators to blink green at long intervals. 3. Setting a New Password Within 10 minutes of the reset, log in via the FusionSolar app to set a new password: support.huawei.cn

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:

If needed, tap "Forgot password?" to receive a code via the app. Conditions:

Perform the reset when solar irradiance is low (e.g., morning/night). If prompted, try default passwords like Assistance: Huawei Technical Support if the reset fails. support.huawei.cn

For specific model instructions (M1, M2, L1), refer to the official documentation. support.huawei.cn Resetting Password - SUN2000-(2KTL-6KTL)-L1 User Manual

To reset the installer password on a Huawei SUN2000 inverter, you must perform a specific power-cycle sequence using the AC and DC switches. Reset Procedure (Step-by-Step)

This process must be completed within 4 minutes once started:

Preparation: Ensure the inverter is operating normally for at least 3 minutes.

Power Off (Cycle 1): Turn off the AC switch and set the DC switch at the bottom of the inverter to OFF. Wait for all LED indicators to turn off.

Power On: Turn the AC and DC switches back ON. Wait until the indicators flash (roughly 90 seconds).

Power Off (Cycle 2): Turn the AC and DC switches OFF again immediately.

Final Power On: Turn the AC and DC switches ON. The password will be reset once the inverter restarts and the indicators return to their normal state. Login & Default Passwords

After the reset, use the FusionSolar App to connect to the inverter's local WiFi and log in using the initial credentials: Initial Installer Password: 00000a Common User Password: 000001

Note: You will be prompted to set a new password immediately after the first login for security.

Are you having trouble connecting to the inverter's WiFi during this process, or is the app not recognizing the default password?

SUN2000-3-4-5-6-8-10KTL-M1 FAQ | HUAWEI Smart PV Global - Huawei

This method forces the inverter to reload a configuration file with known credentials.

  "installer_password": "YourNewPass123",
  "reset_flag": 1

Note: Some firmwares require a digitally signed file. If this fails, you need FusionSolar installer-level support or a direct RPC reset via the SmartLogger maintenance port (requires Huawei proprietary cable).

Title suggestion: Security Mechanisms and Authorized Reset Procedures in Grid-Tied Inverters: Case Study of Huawei SUN2000

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