I measured the watts at the wall with a standard watt meter. The miner is on a 240V line. Model is S9i 14TH.
UPDATE: I've tried two new power settings for auto-tuning. I put in 1200W on the configuration and it auto-tuned to 1111W at 14.8TH which is 75W/TH. I next entered 910W on the configuration page and it auto-tuned to 834W at 12.04TH, about 69.3W/TH. For my S9i-14TH miners, anything above 910W the efficiency starts to go down.
I have three S9i-14TH miners running at about 36TH and 2500W.
https://pasteboard.co/J7MYtI6.jpg