Hello, I have this device and I want to update its firmware. My problem is that when I press the Enter key and navigate to code 29, the battery voltage shows 48 volts, and I can't control the remaining battery percentage. I want an update that allows me to control the percentage at which the device shuts down. The current firmware on the device is U17404/U22225.

I need a suitable, modern presentation program that supports SoC% for settings 29.

Thank you...

Edited Sunday at 09:585 days by AN solar

On 2026/06/22 at 3:40 AM, AN solar said:

I want to update its firmware. My problem is that when I press the Enter key and navigate to code 29, the battery voltage shows 48 volts, and I can't control the remaining battery percentage. I want an update that allows me to control the percentage at which the device shuts down. The current firmware on the device is U17404/U22225.

74.04 is the latest 74.xx firmware that I have. It does not support the QDOP command, so it won't allow setting 29 and two others to use SoC%. Sorry.

On 2026/06/22 at 3:40 AM, AN solar said:

I need a suitable, modern presentation program that supports SoC% for settings 12, 13, and 29.

I don't own one of these inverters, but I've read that you can only change these settings on the front display, not via monitoring software. Once set, you can do everything else via the monitoring software. I have not looked into this.

Edit: BTW, from the looks of the label, I'd guess that this is a clone.

Edited Tuesday at 12:413 days by Coulomb