Solis-(25-40)K-4G inverter HMI firmware updating procedure

Most current HMI firmware version: 3D
For the following inverter models:


Solis-25K-US-SW, Solis-30K-US-SW, Solis-36K-US-SW, Solis-40K-US-SW, Solis-40K-US-F-SW, Solis-25K-US, Solis-30K-US, Solis-36K-US, Solis-40K-US, Solis-40K-US-F 

Note: A Solis Update Stick is required in order to perform DSP and HMI firmware updates. Please reach out to your distributor or to Solis US Service to obtain an Update Stick. 

Solis inverters have two kinds of firmware: Digital Signal Processor (DSP) and Human-Machine-Interface (HMI)

1. Verify the Current Firmware Version:

    A. Advanced Info – Version and hold Up and Down or go to Settings – HMI Update and verify HMI Version Ginlong Technologies (Ningbo) Co. Ltd. Ginlong Solis USA: 565 Metro. Pl. S. Suite 3214, Dublin, OH 43017 Toll free: 866.438.8408,

2. Prepare the Files for the USB Stick: 

    A. There is one file that should be on the USB stick 

    B. The file will be named xxxxxx25-40KxxxxxV3C.bin when sent to you. Copy the file. 

    C. Rename the file to HMI.bin 

    D. Ensure no other files or folders are in the USB directory. 

3. Prepare the Inverter and Install Firmware 

    A. Go to Advanced Setting – Password 0010 - Grid On/Off and turn the Grid to Off. 

    B. Insert the USB Stick in the bottom of the firmware update tool 

    C. Remove Wiring Box Cover 

    D. Remove the RS-485 Wires that go are used in the communication daisy chain 

    E. Set the Address to 1 

    F. Install the firmware update tool in the bottom of the inverter at the green 4 pin plug. 

    G. With the Special 25-40K stick that are labeled in big black letters “25-40K”, once you insert them in all three lights will light up (unlike the normal stick that you need to hold the back button to scroll through the options) 

    H. VERIFY AGAIN the address is set to 1 and the RS-485 wires are out. 

    I. Click the button and you should see the inverter go directly into the update mode. 

    J. It will fast blink for many minutes and not slow blink like a normal update. 

    K. Once it completes the lights will go solid and verify the inverter HMI version has been updated. 

    L. Reinstall the RS-485 Lines and turn the grid back on 

Victor is the author of this solution article.

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