To reset the installer password for a Huawei SUN2000 inverter, you can use either a manual hardware power-cycle or the FusionSolar app if the device is already commissioned. 1. Hardware Reset Method (Manual)
This method restores the local login password, WLAN name, and WLAN password to factory defaults without affecting historical data or the remote FusionSolar account.
Prerequisites: Both AC and DC power must be on, and the indicators must have been steady green or blinking slowly for more than 3 minutes.
Step-by-Step Procedure (Perform steps 2–4 within 4 minutes):
Power Down: Turn off the AC switch, set the DC SWITCH at the bottom of the inverter to OFF, and turn off any connected battery switches.
First Power Cycle: Wait for all LED indicators to turn off. Turn on the AC switch and the DC SWITCH. Wait roughly 90 seconds until the indicator blinks green slowly.
Second Power Cycle: Turn off the AC switch and DC SWITCH again. Wait for all indicators to turn off.
Final Power-On: Turn on the AC switch and DC SWITCH. Wait for the indicators to blink and then turn off after about 30 seconds.
Final Login: Wait until the indicator blinks green slowly. Within 10 minutes, connect to the inverter's WLAN using the initial SSID and password (usually "Changeme") found on the side label. Log in as "Installer" with the default password "00000a" and set a new password immediately. Resetting Password - SUN2000-(2KTL-6KTL)-L1 User Manual
The process for resetting the Huawei SUN2000 installer password is a high-stakes "sequence game" that works effectively if you follow the strict timing requirements
. Users often find the procedure reliable but "fiddly" due to the specific 3-to-4-minute windows required for the power-cycling steps. Huawei Technical Support Expert Performance Review Reliability:
High, provided you follow the manual's power-on/off cycle exactly. Difficulty:
Moderate. It requires physical access to both AC and DC switches and a stopwatch. Time Commitment: Approximately 15–20 minutes total. Success Tip: 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
The Huawei SUN2000 installer password can be reset through a specific physical power-cycling sequence if you have lost access to the local commissioning screen. This process is useful if your original installer is unavailable or if you need to regain local management of your solar system. Initial Default Password
Before attempting a full hardware reset, check if the inverter is still using the factory default settings: Default Installer Password: 00000a. WLAN Hotspot Name (SSID): Starts with SUN2000-.
WLAN Password: Typically Changeme or found on the sticker on the side of the inverter. Hardware Password Reset Procedure
If the default password does not work, follow these steps precisely to restore the password to its initial state. This must be completed when the inverter has both AC and DC power. Resetting Password - SUN2000-(3KTL-10KTL)-M1 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 To reset the installer password for a Huawei
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
To reset the installer password for a Huawei SUN2000 inverter so that it actually works, you must follow a specific physical sequence to trigger the reset mode. This process reverts the password to the default ( ) and resets the network configuration. The Reset Sequence Check Conditions
: Ensure the AC and DC power supplies to the inverter are both connected and that the indicators (LED1 and LED2) are steady green or blinking slowly for more than 3 minutes.
: Turn off the AC switch and then set the DC switch at the bottom of the inverter to
. Wait until all LED indicators on the inverter panel turn off. Power On/Off Cycle : You must complete the following three steps within
: Turn on the DC switch and wait until the LED indicators blink. Then, turn off the DC switch.
: Turn on the DC switch again and wait until the LED indicators blink. Turn off the DC switch.
: Turn on the DC switch and wait until the inverter LEDs blink. Keep it on this time. Wait for Reset
: Wait for the inverter to enter the reset state. The indicators will blink to show the reset was successful. Comparison with other inverter brands
: Connect to the inverter's built-in WLAN. The default installer password is now Troubleshooting "Not Working" Issues
: 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
app still rejects the password, try clearing the app cache or using a different mobile device to connect to the inverter's local WiFi signal directly.
: 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?
Title suggestion: Authorized Installer Password Recovery for Huawei SUN2000 Inverters: A Technical Overview
Key sections:
Before you short pins or factory reset your $2,000 inverter, understand the risks:
The Huawei SUN2000 series inverters (ranging from residential 2-10kW to commercial 50-150kW models) use a tiered access system:
If the installer password is lost, forgotten, or inherited from a previous installer, physical access and a specific reset procedure are required. There is no remote backdoor.
Before attempting a reset, try the standard default passwords. Note that newer firmware updates often force a password change upon first login, so these may not work on used units:
Crucial Warning: Attempting random passwords too many times will lock the login interface for 15–60 minutes.