BeamV2 has got a higher hash and more power consumption. You cant compare it with BeamV1.

Data of some of my rigs:

1070   120 Watt 31-35 Sol
1080   140 Watt 40-41 Sol
1080ti 220 Watt 54-56 Sol
2080   125 Watt 46-48 Sol

Wotan