Ensure both DC (solar panels/battery) and AC (grid) power sources remain active and stable during the process. Never flip the DC switch off while the update is running.
If you use Modbus TCP for third-party monitoring, be aware that new firmware as a security measure. You must reconnect to the inverter's Wi-Fi network and manually re-enable it in the settings. If your integration software fails, updating to the latest beta version may resolve compatibility issues. sun2000-6ktl-m1 firmware
Use this summary checklist when performing a firmware update on your SUN2000-6KTL-M1: Ensure both DC (solar panels/battery) and AC (grid)
Open the FusionSolar App, go to the commissioning screen, and scan the WLAN QR code on the inverter to connect to its local Wi-Fi. Log In: Log into the local account (installer account). You must reconnect to the inverter's Wi-Fi network
A: Do not power off. The inverter will often retry. If it fails three times, use the USB recovery method. If the LCD is frozen, cut AC+DC power for 5 minutes to hard reset.
While exact version numbers change rapidly, typical release families for the M1 series look like:
: Power grids frequently update their localized stability requirements. Installing the latest Huawei Support patch releases updates internal profiles like CEI0-21 or EN50549.