Sata Hat on Raspberry PI 5 can't boot via USB?

Hello All! New here novice user. I have my sata hat with 4 ssd drives ruining OMV on a pi 5 with 4 gig. The OS is on a 16 gig Sun SD card. And it works fine. I wanted to set it up to boot from a USB drive as the SD cards don’t last very long.however when I try and boot the pi via the USB drive I get an under voltage Error when I am using the 12 volt 5 amp barrel connector on the SATA hat? The pi will boot OK if i use an official Pi power supply. But I did not try a full install of OMV with the supply.
For now I am running off the SD card.
Any input is welcome, as I am just a novice.
Best regards
Tony