How do I update the firmware on my solar inverter

General Firmware Update Procedure

1. Identify Your Inverter Model and Firmware Version
   Check your inverter’s current firmware version via its display panel or monitoring app to know if an update is available. Contact the manufacturer or visit their official website with your model number to find the latest firmware version compatible with your device.
2. Obtain the Necessary Update Software and Tools
   • For many inverters (e.g., Voltronic-based), you will need specific cables such as a serial to Ethernet adapter and possibly an RS232 to USB adapter to connect your inverter to a computer.
   • For other models, firmware files may be downloaded in a zipped package from the manufacturer’s website, or updates may be done via USB flash drive or directly through a smartphone/tablet app/web portal.
3. Prepare Your Computer or Device
   • Install any required software tools or update applications provided by the manufacturer.
   • Format and prepare a USB flash drive if the update uses this method. The drive should typically be FAT32 formatted and meet any size requirements specified by the manufacturer (e.g., 4 to 8 GB recommended).
4. Download and Transfer the Firmware File
   Download the correct firmware file for your inverter model and transfer it to the prepared USB flash drive or load it into the update program on your PC.
5. Power Down and Connect
   • Power off your inverter and other inputs (PV disconnect, AC output, grid input) to ensure safety and prevent power loss during updating.
   • Insert the USB flash drive into the inverter’s USB port or connect your laptop to the inverter’s update port with the necessary cables.
6. Initiate the Firmware Update
   • Follow the on-screen instructions on the inverter’s display or use the update software on your PC/smart device to start the update process.
   • The update process may take 5 to 15 minutes or longer depending on the inverter and firmware size. Do not interrupt the power or disconnect cables during this time.
7. Completion and Verification
   • After the update completes, the inverter may reboot automatically.
   • Verify the firmware version on the display or app to confirm successful installation.
   • In some cases, additional updates may be necessary for remote panels or displays, which follow a similar process.
8. Final Steps
   • Safely eject any USB drives.
   • Perform a full system shutdown and restart your inverter to ensure the new firmware is fully loaded and operational.

Brand-Specific Notes

• Voltronic/Axpert Inverters: Require a serial to Ethernet adapter cable to connect the inverter to a PC for firmware reflashing. The update fixes bugs and restores functionality. The update software is usually provided by the manufacturer after contacting them with your model details.
• Growatt Inverters: Firmware updates are handled via USB flash drive. Download the latest firmware from the Growatt website, copy it to a USB drive, power off the inverter completely, insert the drive, and follow on-screen prompts to update. Monitor progress and restart after completion.
• Hybrid Inverters (e.g., NHX-10): Firmware files may be downloaded from the manufacturer or a partner site. Updates often involve first updating the display firmware via a USB drive and then uploading the main inverter firmware via a USB-C connection to a laptop and dedicated software.
• 6000xp Inverters: Firmware updates are typically done through the inverter’s app or web portal under the Maintenance > Remote Update section. Installer codes may be required to access updates.

Summary Table

By carefully following the instructions specific to your inverter model and using the correct cables and software, you can keep your solar inverter firmware up to date, improving performance and fixing bugs. If unsure, always consult your inverter’s user manual or contact manufacturer support for detailed guidance.