Three m20s were tested.

One did 69th at 3360 watts
One did 68th at 3350 watts
One did 65th at 3180 watts.

If you use  208, 220, 240 as volts only the 65th passes as at all levels it is under 16 amps.

No one has run or tested or demo’ed the 57th. From innosilicon but they claim multiple power settings so they will be able to be under 15 amps on the low setting.