We would like to inform you that the supported voltage for this unit is 19v only.
Please find this information in our technical product specifications located at the following link:
I notice other links on NUC that indicate otherwise. did you just look in the manual or discuss with the NUC team. reason i ask is that i see new tech guides that indicate 12VDC is acceptable. can you dig a bit deeper? thanks it's critical.
In this case this unit support 19 V DC, you can see more detailed information in the technical product specifications.
See page 43