Easun Firmware Update
Once you have successfully completed the , your work is not done.
Most Easun inverters (including popular models like the SMG II and SMH III) follow a similar update procedure using a PC. Guide to Firmware Update | Lenovo US
Click or Open and select the firmware file (usually ending in .hex , .bin , or .dld ). Click Update or Start . Step 4.4: The Flash Process
The software cannot talk to the inverter. Ensure the monitoring software (like WatchPower) is completely closed so it does not block the COM port. Check your Device Manager to ensure your USB-to-Serial drivers are fully updated. easun firmware update
There’s no single central repository. Here is where the Easun community has had the most success:
The safest way to get firmware is by contacting EASUN directly through their official website or the store where you purchased the unit (e.g., AliExpress official store).
If your unit is out of warranty, highly trusted solar DIY communities like the Power Forum host verified repositories of Voltronic/Axpert-based firmware, which many EASUN models utilize. Cross-reference your hardware version multiple times before downloading from third-party sources. Step 3: Prepare the Required Tools Once you have successfully completed the , your
This comprehensive guide covers everything you need to know to safely navigate an Easun firmware update. Why Update Your Easun Inverter Firmware?
Most Easun inverters require a dedicated RJ45-to-RS232 cable paired with a high-quality USB-to-Serial adapter (often utilizing the FTDI chip) to connect to your laptop. Newer models may support direct USB connection. Step-by-Step Guide to Updating Easun Firmware Step 1: Source the Correct Firmware File
The inverter’s LCD screen will typically go blank, turn red, or display a specific code like UP or FL . Click Update or Start
In the tool interface, select the exact you found in the Device Manager.
Provide a clear photograph of the silver specification sticker. Provide your current U1 and U2 firmware versions.
It typically takes between 3 to 8 minutes. Step 5: Verification and Reboot