Power requirments for A603 Orin carrier

We have a very nice A603 carrier board for the Nvidia Orin NX 16GB.
We want to supply power from a 6S battery - that means more than 21V.
The A603 only support up to 19V so we need a voltage converter to e.g. 12V.
Mateksys have a nice BEC that convert power to 12V @ 5A continous and 9A in bursts.
Will this work or do we need a different power supply?
Looking forward to answers or suggestions!