Once the software displays "Update Successful" or reaches 100%, close the program. Step 5: System Reboot Turn off the inverter using the physical power switch.
Firmware patches resolve known glitches, such as random error codes (e.g., Error 09 or Error 51), screen freezing, or monitoring log gaps.
Open the flashing software provided by Easun (run as Administrator if necessary). easun firmware update
Easun produces dozens of inverter models (e.g., Isolar, SML, SMX, IGrid).
Ensure the inverter is connected to a stable battery bank. Never update on PV power alone. 📝 Step-by-Step Update Process Connect the Hardware: Once the software displays "Update Successful" or reaches
Take a clear photograph of the silver specification sticker on the side of your inverter. Take a photo of your current U1/U2 firmware screens.
Plug the RJ45 end of your cable into the inverter's computer port and the USB end into your laptop. Identify COM Port: Open the flashing software provided by Easun (run
Select the correct discovered in Step 2. Set the Baud Rate according to the manufacturer’s instructions (commonly 9600 or 19200).
Set the Baud Rate (usually specified by Easun, often 9600 or 19200).
Updating the firmware on an EASUN inverter is a critical maintenance task used to resolve bugs, such as continuous fan operation or sensor inaccuracies, and to enable features like parallel system compatibility. Because many EASUN units are based on Voltronic Power architectures, they often share update procedures with brands like Axpert or MPP Solar. 1. Pre-Update Requirements