Meshsolar unresponsive

I have a Meshsolar, and it was working for 4 months. Yesterday it stopped working and I cannot connect to it with usb or bluetooth, no matter what I do.

  1. The BMS is working, I did shutdown it and reenable it with 20V USB power adapter multiple times.
  2. I checked the BMS OUTPUT voltage, and it’s around 12,9 - 13 Volts, so all 4 batteries are connected correctly.
    4.I tried putting it in DFU mode by double pressing the RST button, but nothing happens when I do.
  3. Ι checked the battery switches, and they are ok.
  4. The device does not show up as a usb device or in chrome meshtastic web flasher/ client tool or the Meshsolar webserial tool (BMS).
  5. I tried 2 different known working usb cables (they work on my Heltec T114 just fine for data).

I don’t have a display so I can’t say if the node is on at all. In future iterations of the product, please include a display, I had such a hard time without one.

Is there any way I can factory reset it? What else would you suggest?