Huawei+sun2000+reset+installer+password+work -

Change password immediately.

Power off, reset dip switches to all OFF, restart normally.

Huawei introduced a security patch in late 2024 (Firmware V100R001C20SPC110 and above) that disables the physical jumper reset for "Installer" level access.

If the official recovery fails, the only reliable way to reset the installer password is a physical reset of the inverter. Warning: This will erase energy statistics and grid parameters. Do not do this if you are unsure of your local grid code (e.g., G98/G99, VDE-AR-N 4105). huawei+sun2000+reset+installer+password+work