Installers can manually update firmware with a USB flash drive using a .zip file provided by their Tigo support team. If your firmware is significantly out-of-date, you may need to update it to an intermediate version and then update it again to the latest version.
To update firmware, you will:
Determine if You Must Update to an Intermediate Version
- On the inverter LED screen, select About > Internal Code and press the Enter arrow.
- Check the last two digits of the code:
• Single phase – if <29, you must update to the intermediate version.
• Three phase – if <27, you must update to the intermediate version.
To obtain an intermediate firmware update file, contact your Tigo distributor for a link to a .zip file or a USB flash drive. Use the following procedures to update the inverter firmware once for the intermediary version (if needed) and then again for the latest version.
Prepare a USB Flash Drive (requires USB v. 3.0)
- Extract All ... from the .zip file.
- Format a <32 GB USB flash drive for a FAT32 file system.
- Find and copy the extracted Update folder to the USB flash drive.
Update must be the top-level folder on the drive.
The update must be performed during daylight while DC current from the solar array is powering the EI Inverter.
Update Firmware
- On the EI Link, check that the DC disconnect switch on the left of the box is ON.
- Insert the USB flash drive in the EI Inverter Update port.
If the port is currently used by a different cable, temporarily remove that cable. - Scroll to select Upgrade > ARM and press the Enter arrow.
Upgrade ARM before upgrading DSP. - Select OK and press Enter.
- When the Upgrade DSP? prompt appears, press Enter.
- Select OK and press Enter.
- When the Upgrade BMS-Master? prompt appears, press Enter.
- Select OK and press Enter.
- When the Upgrade BMS-Slave? prompt appears, press Enter.
- Select OK and press Enter.
- Upon completion, an Upgrade Successful prompt appears.
- Reconnect any other cable that had occupied the Update port.