Open Device Manager on your PC to find the assigned COM port ID. Close Background Apps:
Identify the in Windows Device Manager under "Ports (COM & LPT)". Prepare for Reflash : easun firmware update
: Once finished, disconnect the cable, turn the inverter switch to OFF for 30 seconds, then back to ON to initialize the new software. Troubleshooting Communication Failed Open Device Manager on your PC to find
Ensure the inverter is not in "Power Saving" mode and that the battery voltage is stable (above 12V/24V/48V depending on your system). disconnect the cable