I have something of my own creation a somewhat overclocked (725Mhz) BM1397 that averages 480GH/s, its using about 18Watts at the DC port including the power for the fan and the RaspberryPI Zero 2W thats controlling it.

Presently its pointing at CK pool, but I had it running on my local node for about a week without any issue.

Updating Kano's CGMiner is a bit of a chore but its achievable provided you follow the differences carefully.

Good luck!