Sometimes, firmware updates are pushed or notified through the WatchPower PC software when connected via USB. Step-by-Step Update Guide Prerequisites A Windows laptop/PC.
You must match the update to your specific hardware. A "VM III" update is not compatible with a "VM II" or "King" model. Where to Find Official Firmware
Do not attempt an update if your batteries are low or if there's a risk of a power cut. If the inverter loses power during a flash, it may "brick." axpert vm iii firmware
Before looking for files, you need to know what you’re currently running. On the Axpert VM III, you can find this on the LCD:
Once the tool says "Update Successful," the inverter will restart. Re-check the U1/U2 screens to confirm the new version. Critical Safety Warning Sometimes, firmware updates are pushed or notified through
Newer firmware versions often include improved protocols for communicating with Pylontech, Dyness, and other popular lithium batteries via the RS485 or CAN port.
Fine-tuning the Maximum Power Point Tracking algorithm helps the inverter harvest more energy in cloudy conditions. Identifying Your Current Firmware A "VM III" update is not compatible with
Try a different USB cable or a different laptop. Inverters are notoriously picky about Serial-to-USB chipsets (FTDI chips are recommended).