If you followed the steps but the password 00000 still fails, check these three issues:
Huawei introduced a security patch in late 2024 (Firmware V100R001C20SPC110 and above) that disables the physical jumper reset for "Installer" level access.
Huawei has changed the process over time. Below are the three working methods as of 2024-2026.
Before you short pins or factory reset your $2,000 inverter, understand the risks:
Please reply with:
I will then produce a complete, original, and responsible paper that avoids security bypass instructions and stays within ethical, practical bounds.
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 Power-Cycle Reset Procedure
This manual method is the standard way to regain access when the installer password is lost. Ensure the inverter has been running for at least 3 minutes before starting.
First Power-Off: Turn off the AC switch and the DC switch at the bottom of the SUN2000. Wait until all LED indicators on the inverter panel turn off.
First Power-On: Turn on the AC switch and the DC switch. Wait for about 90 seconds or until the LED indicators blink.
Second Power-Off: Within 4 minutes of powering on, turn off the AC and DC switches again.
Second Power-On: Turn the AC and DC switches back on. The inverter will restart.
Reset Window: Once the indicators show a "slow blinking" state (typically after the restart), you have a limited time to connect via the app and reset the password. Initial/Default Passwords
If you have successfully triggered the reset or are logging in for the first time, try these common default passwords found in the Huawei Solar Product Documentation:
Installer/Special User: 00000a (common for newer SUN2000L models). Common/Advanced User: 000001.
Alternative Installer: Changeme (often used in some regions or older firmware). Post-Reset Actions
Login: Connect your mobile phone to the inverter's built-in WLAN.
Set New Password: Use the FusionSolar App to log in with the initial password. You will be prompted to change it immediately for security.
Validation: If the sequence fails, verify that the inverter remained on for at least 3 minutes before the first power-off, as a premature reset may not register. huawei+sun2000+reset+installer+password+work
Are you currently on-site with the inverter, or are you trying to troubleshoot this remotely via the FusionSolar portal?
SUN2000-3-4-5-6-8-10KTL-M1 FAQ | HUAWEI Smart PV Global - Huawei
Forgot Your Huawei SUN2000 Installer Password? Here’s How to Reset It
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.
Here is a step-by-step guide to resetting your Huawei SUN2000 installer password manually. Prerequisites Before You Start Ensure the inverter is connected to both AC and DC power.
The indicators should be steady green or blinking slowly for at least 3 minutes before beginning the reset.
You must complete the power-cycling steps within a 4-minute window. Step 1: The Power Cycle Sequence
To trigger the reset mode, you must perform a specific sequence of switching the unit off and on:
Power Off: Turn off the AC switch first, then set the DC SWITCH at the bottom of the inverter to OFF. If you have a battery connected, turn that switch off too.
Wait: Wait until all LED indicators on the inverter panel are completely off.
Power On: Turn the AC switch back on, then set the DC switch to ON. Wait about 90 seconds until the indicator blinks green slowly.
Repeat Power Off: Turn the AC and DC switches off again and wait for all LEDs to turn off.
Final Power On: Turn both AC and DC switches back on. The LEDs should blink and then turn off after about 30 seconds, indicating the reset is active. Step 2: Logging in Locally
Once the reset is triggered, you have 10 minutes to set a new password: Open the FusionSolar app on your phone.
Connect to the inverter’s local WLAN hotspot. You can find the initial SSID and password on the label on the side of the inverter.
In the app, go to Device Commissioning and select your inverter.
Choose the Installer role. The default password is often 00000a (five zeros and a lowercase 'a'). Follow the prompts to set a new password immediately. Important Tips
Time Sensitive: If you don't set the new password within 10 minutes, the inverter will revert to its old settings, and you'll have to start the power cycle over. If you followed the steps but the password
Low Light Recommendation: It is best to perform this reset in the morning or evening when sun irradiance is low to avoid high-current switching.
What Resets?: This process only resets the local login and WLAN credentials. It does not delete your historical energy yield data or your FusionSolar cloud account password.
You can find detailed manuals on the Huawei Enterprise Support site. Resetting Password - SUN2000-(2KTL-6KTL)-L1 User Manual
The Struggle to Reset the Huawei SUN2000 Inverter
It was a sunny day in late summer when John, a solar engineer, arrived at a residential solar panel installation site. His task was to troubleshoot a faulty Huawei SUN2000 inverter, which was not communicating with the grid. After reviewing the system's monitoring data, John suspected that a software issue might be the culprit.
As he began to investigate, John realized that the previous installer had left behind a cryptic note with a faintly scribbled password. Unfortunately, the password was not documented anywhere, and the homeowner had no record of it either. Without the password, John couldn't access the inverter's settings to perform a reset.
Frustrated but determined, John decided to dig deeper. He downloaded the Huawei SUN2000 inverter's user manual and searched for clues on how to reset the device. The manual hinted at a reset procedure, but it required him to access the inverter's built-in web interface. The catch: he needed the admin password.
John tried using the default passwords listed in the manual, but none of them worked. He then attempted to use a password recovery tool, but it didn't recognize the inverter's firmware version. As the hours ticked by, John's frustration grew. He knew he needed to find a solution before the homeowner's electricity bill skyrocketed.
Just when John was about to give up, he stumbled upon an obscure forum post from a fellow engineer who had encountered a similar issue. The engineer had mentioned a specialized installer tool that could reset the SUN2000 inverter to its factory settings. The tool was password-protected, but the engineer had shared a faintly remembered password: "HuaweiSUN2000_reset!"
With trembling fingers, John entered the password and... voilà! The tool worked its magic, and the inverter's lights flickered back to life. John breathed a sigh of relief as he reconfigured the inverter's settings and rebooted the system. The solar panels began to feed electricity back into the grid, and the homeowner's energy bills would soon return to normal.
As John packed up his tools to leave, he couldn't help but feel a sense of accomplishment. He had battled the Huawei SUN2000 inverter and emerged victorious, thanks to a combination of persistence, resourcefulness, and a little bit of luck. From that day on, John made sure to document every password and configuration detail, so he wouldn't have to face a similar challenge again. The experience had taught him a valuable lesson: even the most stubborn technical issues can be resolved with the right mindset and a dash of creativity.
To reset the installer password on a Huawei SUN2000 inverter, you can use a hardware-based "power cycling" method or the FusionSolar app. If the device is new or has been reset, the default installer password is typically 00000a. Method 1: Hardware Reset (Power Cycle)
This method is used when you cannot log in to the system at all. It requires physical access to the inverter's AC and DC switches.
Check Power Status: Ensure both AC and DC power are connected. The indicators should be steady green or blinking slowly for at least 3 minutes. Power Down: Turn off the external AC switch. Set the DC switch at the bottom of the inverter to OFF.
Wait until all LED indicators on the panel are completely off. Cycle Power (Must be done within 3-4 minutes):
Turn the AC switch ON and the DC switch ON. Wait about 90 seconds until the indicator blinks green slowly.
Turn the AC switch OFF and the DC switch OFF again. Wait for all LEDs to turn off. Turn the AC switch ON and the DC switch ON a second time.
Reset within 10 Minutes: Once the indicator blinks green at long intervals (or blinks red/green rapidly depending on the model), you have 10 minutes to set a new password via the app. If you wait longer, the inverter will revert to the old password. Method 2: FusionSolar App Reset Please reply with:
If you are already connected to the inverter's WLAN but forgot the local password, follow these steps in the FusionSolar App:
Connect to WLAN: Connect your phone to the inverter’s built-in WLAN hotspot (SSID and initial password are on the side label).
Forgot Password: On the login screen, select Installer and tap "Forgot password?".
Verification: Follow the prompts to "Get Code." You may need to switch to a network with internet access to verify your FusionSolar account and receive a verification code.
Set New Password: Enter the code in the app to set a new installer password. Quick Reference for Defaults Initial Installer Password: 00000a Initial WLAN Password: Changeme Common/Advanced User Password: 000001
For specific model manuals, you can visit the Huawei Support Portal for the SUN2000-L1 or SUN2000-M2 series. Resetting Password - SUN2000-(8KTL-20KTL)-M2 User Manual
Many guides skip this, but you must attempt the "Forgot Password" flow inside the SmartLogger or Inverter WebUI before trying hard resets.
If you need a legitimate, well-cited informational document (e.g., a technical note or white paper) on related topics, here are three valid directions:
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
Disclaimer: Performing a password reset will disrupt monitoring and may require re-configuration of grid parameters. Only proceed if you are authorized to manage this equipment.