JUST POWER ON66
8. System Maintenance
8.1 USB firmware upgrade
The EP760 inverter supports firmware upgrades via a USB drive to optimize its
performance and avoid failures caused by firmware errors.
Step 1: Connect the USB drive to a USB port on your computer.
Step 2: Download the upgrade file*, unzip and store it on the USB drive.
Step 3: Connect the USB drive to the USB port on EP760.
Step 4: Power on EP760.
Step 5: The firmware upgrade starts automatically once the upgrade files are
detected.
Step 6: The buzzer beeps once after the firmware is updated successfully. Please
unplug the USB drive, or EP760 will report a USB Format Error.
Step 7: Pair EP760 ESS with BLUETTI App, then you can check the firmware version
in System information>> Firmware version. If any of the following occurs, please try
the solutions provided. If the symptom persists after 5 attempts, contact the
BLUETTI support team.
* Please contact our company for further assistance.
8.2 OTA firmware upgrade
The EP760 ESS also supports OTA firmware upgrade. For details, please refer to
"Firmware Upgrade" in the BLUETTI App Instructions.
Error Description
USB Upgrade Failed. Please contact the BLUETTI support team.
1.Make sure the USB is formatted as FAT32 with no
more than 32G in size.
2.Check if the upgrade files exist or expire. Please
download the latest upgrade files.
Please download the latest upgrade files. If the
symptom persists, contact the BLUETTI support team.
USB Format Error
Firmware version not
updating or abnormal.
Solution
Table 8-1