update using only solar (PV) power, as a passing cloud could cut power and fail the update. Phase 1: Preparation Request Firmware
Power cycle the inverter (off, wait 30 seconds, on). Go into the LCD settings to confirm the firmware version numbers have changed.
Optimizes Maximum Power Point Tracking (MPPT) algorithms to extract more power from solar arrays during low-light conditions.
Select the correct COM port and choose the new firmware file. Step 4: Perform the Update Click "Update" or "Reflash." The display on the inverter might go blank or show "U1."
on Windows to see which port (e.g., COM3) the cable is using. Run the Update Tool: easun firmware update
Most EASUN models (SMH, SML, SPL, SPH) share similar procedures. Step 1: Check Current Version
Proper preparation is vital to minimize risk. Before you begin:
Most modern Easun units are updated using a Windows laptop running a proprietary manufacturing utility like , WatchPower , or a standalone ISP (In-System Programming) Tool . Step 4.1: Preparation and Isolating the Inverter
After a successful update, you must reapply your settings, which often reset to defaults: update using only solar (PV) power, as a
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
Open the flashing software provided by Easun (run as Administrator if necessary).
Click "Update" or "Start." You will see a progress bar. The inverter’s fans may spin at full speed, and the screen may go blank or show "UP"—this is normal. Step 5: Restart and Verify
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Optimizes Maximum Power Point Tracking (MPPT) algorithms to
This comprehensive guide covers everything you need to know to safely and successfully update your Easun inverter firmware. Why Update Your Easun Inverter Firmware?
Optimized Maximum Power Point Tracking (MPPT) logic for better solar yields.
Ensure the COM port is correct and no other software is using it.
EASUN does not maintain a public, centralized firmware repository. You can obtain files through: