Thank you very much. I understand more now and was able to find my mistake. I’ve focused too much on trying to get DT_N_S_vbatt_S_vbatt0 to be defined while the mistake was somewhere else - in my case it was a DEVICE_DT_GET(DT_IO_CHANNELS_CTLR(VBATT_LIPO)) further - as you previously indicated that there might be the source of the problem. Thank you again for your time and help!