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Troubleshooting and Maintenance
12.3.2 Upgrading Firmware
WARNING!
• Make sure that the type and format of the firmware file are correct. Do not modify the
file name. Otherwise, the inverter may not work properly.
• Do not modify the folder name and file path where the firmware files are located, as
this may cause the upgrade to fail.
WARNING!
• Before upgrading, ensure that the PV input voltage is higher than 180 V (preferably on
sunny day), or that the battery SOC is higher than 20%, or the battery input voltage
is higher than 180 V. Failure to meet one of these conditions may result in upgrade
process failure.
WARNING!
• When upgrading firmware including ARM, please give priority to upgrading the ARM
program.
Upgrade preparation
• Prepare a USB drive (USB 2.0/3.0, FAT16 supports up to 2GB; FAT32 supports up
to 2TB).
• Check for the current firmware version of the inverter.
• Contact our service support for the update firmware file, and save it to the USB
drive.
»
For ARM file: XXX.XXXXX.XX_HYB_3P_ARM_VXXX.XX_XXXX.usb
»
For DSP file: XXX.XXXXX.XX_HYB_3P_DSP_VXXX.XX_XXXX.usb
Upgrade steps
a. Press and hold the Enter key on the inverter LCD for 5 seconds to enter the OFF
mode.
b. Remove the dongle from the Dongle terminal of the inverter by hand, and then
insert the USB drive. The inverter will automatically display the Upgrade Selection
interface. (For the position of Dongle terminal, see "8.1.1 Terminals and Parts of
Inverter".)
c. On the Upgrade Selection interface, select ARM or DSP based on the file type,
and then tap OK.
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