You’ll need:
Open the update executable application (typically named Inv_Update.exe or ReflashTool.exe ). Select the correct matching your Device Manager.
Once the progress bar hits 100%, the software will display a "Flash Successful" or "Update Ready" message. The inverter will automatically reboot, and the LCD screen will light back up. Troubleshooting Common Update Failures Symptom: "Communication Error" or "Command Refused"
Once the software confirms success, perform a hard reset to clear the cache of the processor: Close the flashing software and unplug the data cable. easun firmware update
Email official Easun technical support or your direct seller. Provide a photo of your inverter’s specification sticker and your current firmware version.
Updating the firmware on your Easun solar inverter is the most effective way to unlock new features, fix persistent software bugs, and improve overall system efficiency. However, flashing firmware carries inherent risks. A single mistake can brick your inverter, voiding your warranty and leaving your solar setup offline.
Connect the data cable from the inverter’s COM port to your laptop. Open the Windows on your laptop. The inverter will automatically reboot, and the LCD
Newer firmware adds communication protocols for the latest LiFePO4 battery management systems (BMS).
Once the software displays a "Success" or "Update Finished" dialogue box, close the program. Disconnect the data cable.
Set the baud rate (usually defaults to 2400 or 9600 , leave as instructed by Easun). Provide a photo of your inverter’s specification sticker
Reconnect the battery, turn the inverter switch back , and check the LCD menu settings to verify that the new firmware version number is displayed. Reconnect your PV solar panels and grid inputs. 5. Troubleshooting Common Update Failures Symptom / Error Root Cause "Record Error" or "Open Serial Port Fail" The software cannot see the inverter.
Updating your Easun firmware is a relatively straightforward process. Follow these step-by-step instructions:
Issue 2: The Flash Failed Mid-Way and the Inverter Won't Turn On
Turn on the inverter switch and check the LCD menu to verify that the new or U2 version matches your update. Re-engage your PV and Grid breakers. 6. Troubleshooting Update Failures Probable Cause Action Step "Communication Timeout" Wrong COM port selected or bad serial adapter.