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.
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
To reset the installer password for a Huawei SUN2000 Go to product viewer dialog for this item.
inverter, you must perform a specific sequence of AC and DC power cycles within a strict timeframe. This process restores the local login password, WLAN name, and WLAN password to their factory defaults. Preparation
Before starting, ensure the inverter has been powered on and operating normally (steady or slowly blinking green indicators) for at least 3 minutes. Physical Reset Procedure You must complete these steps within 4 minutes:
Power Off: Turn off the AC switch and set the DC switch at the bottom of the inverter to OFF. If a battery is connected, turn off its switch as well. Wait for all LED indicators to turn off completely.
Power On: Turn the AC and DC switches back to ON. Wait roughly 90 seconds until the indicator blinks green slowly.
Repeat Power Off: Turn the AC and DC switches to OFF again. Wait until all LED indicators are off.
Final Power On: Turn the AC and DC switches back to ON. The indicators should blink and then turn off after about 30 seconds, signaling a successful reset. Setting the New Password
Once the reset is complete, you have 10 minutes to set a new password:
Connect to WLAN: Connect your mobile device to the inverter's built-in Wi-Fi. The default SSID and password (typically "Changeme") are located on the label on the side of the inverter. huawei+sun2000+reset+installer+password+work
FusionSolar App: Open the app, go to Device Commissioning, and log in. You will be prompted to set a new password immediately.
Default Credentials: If prompted for a default login, the initial password for roles like "Advanced User" or "Special User" is often 00000a or 000001.
The following video demonstrates the exact timing and switch operations required for a successful manual reset:
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.
: 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?
How to Reset Your Huawei SUN2000 Installer Password Losing access to your Huawei SUN2000 inverter’s installer account can stall maintenance and system updates. Whether you've forgotten a custom password or the default isn't working, here is the official process to reset it and regain control. 1. Try Default Passwords First
Before performing a hard reset, try the manufacturer’s initial credentials. Note that these are often changed during the first setup for security. Common/Advanced/Special User: SUN2000L App Installer: Charger-Only Installer: 2. The Physical Reset Procedure (Hard Reset)
If you cannot log in, you must use a specific power-cycling sequence to trigger a password reset on the unit itself. Important: This entire process must be completed within Preparation
: Ensure the inverter is operating normally for at least 3 minutes before starting. First Power Off Turn off the AC switch. Turn off the DC switch at the bottom of the inverter.
If connected to energy storage (battery), turn off the battery switch. Wait for all LED indicators to turn off. First Power On
: Turn the switches back on. Wait for the LEDs to cycle through solid green and rapid blinking until they reach a slow blinking Second Power Off
: Immediately turn off the AC, DC, and battery switches again as soon as you see the slow blink. Second Power On
: Turn everything back on. The inverter will restart. Once it reaches the slow blinking state again, the password has been reset. 3. Reconnecting via the App
Once the physical reset is complete, you must re-pair your mobile device with the inverter to set a new password: FusionSolar App SUN2000 App
Connect to the inverter’s local Wi-Fi or via Bluetooth/USB.
Scan the QR code or label on the side of the inverter to log in. Set a New Password
: The system will prompt you to create a new installer password immediately. Choose a strong one and record it securely to avoid repeating this process. 4. Remote Reset (For FusionSolar Admins) Forgot Your Huawei SUN2000 Installer Password
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
Resetting Installer Password for Huawei SUN2000
The Huawei SUN2000 is a popular inverter model used for solar power systems. If you've forgotten the installer password or need to reset it, this guide will walk you through the process.
Why Reset Installer Password?
The installer password is used to access and configure the SUN2000 inverter. If you've forgotten the password or need to make changes to the inverter settings, resetting the password is necessary.
Precautions
Before attempting to reset the installer password, ensure you have the following:
Step-by-Step Instructions to Reset Installer Password
Method 1: Using the LCD Screen
Method 2: Using Software (e.g., SmartEnergy Manager)
Method 3: Using the RS485 Interface (for advanced users)
Workarounds and Common Issues
Conclusion
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. Authorized access : Only authorized personnel should attempt
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
Here’s a well-structured, helpful post tailored for solar installers or system owners who’ve encountered the Huawei SUN2000 installer password issue.
You can use this on LinkedIn, a forum (like SolarPanelTalk or DIY Solar Power), or a company blog.
Title: 🔧 Forgotten Huawei SUN2000 Installer Password? Here’s a Safe Reset Workaround
Intro
You’re on-site, the Huawei SUN2000 inverter is connected, but FusionSolar asks for the installer password — and no one remembers it. Don’t worry, you don’t need brute-force tools. There’s a legitimate hardware reset method.
✅ The Official(ish) Way – Reset Using the Physical Button
Most Huawei SUN2000 models (4–12 kW) have a physical reset button near the COM port or under the bottom cover.
⚠️ This clears:
- Installer password → back to default (
000000)- WiFi/4G settings
- Grid parameters (you’ll need to reconfigure for your country)
🔄 After Reset – Set a New Installer Password
Huawei_SUN2000_XXXXXX).00000a (note the letter a at the end).🚨 If the physical reset fails (e.g., newer models without button)
Some SUN2000s (especially 3-phase) require SD card recovery:
recovery.txt with text:reset installer password000000.💡 Pro tip
Always register the inverter under your FusionSolar installer account. That way, if you forget the local password, you can remotely reset it via the cloud — no truck roll needed.
Final warning
Never share a working installer password in public forums. It grants full control over grid protection settings — a serious safety risk.
👍 Found this helpful? Save it for your next service call.
#HuaweiSolar #SUN2000 #SolarInstallers #TechTip
Once you reset the installer password, the inverter is "Naked." It has lost its grid parameters. If you reconnect it to the grid without setting the country code, it will not export power (or worse, trip breakers).
Please reply with:
I will then produce a complete, original, and responsible paper that avoids security bypass instructions and stays within ethical, practical bounds.
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.
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:
Many guides skip this, but you must attempt the "Forgot Password" flow inside the SmartLogger or Inverter WebUI before trying hard resets.
This method forces the inverter to reload a configuration file with known credentials.
paramcfg.json with the following content (adjust to your device model):
"installer_password": "YourNewPass123",
"reset_flag": 1
SD slot (under the front cover).YourNewPass123, then delete or ignore the file.Note: Some firmwares require a digitally signed file. If this fails, you need FusionSolar installer-level support or a direct RPC reset via the
SmartLoggermaintenance port (requires Huawei proprietary cable).
Before we fix the issue, we must understand the architecture. The Huawei SUN2000 has two distinct user roles: