This is in addition to my previous chart on miner roi for different Antminer models. The S9 is the only model making a profit now and is the only sha256 miner currently used by Bitmain according to news articles. My previous chart only looked at ROI for retail miners. Here I show estimates for Bitmain (area plots) itself who pay less for their mining equipment...
Chart shows the return on investment of Antminer S-series miners:
S1 (yellow): approx released July 2013, power consumption 2 kW/TH/s
S3 (purple): approx released June 2014, power consumption 0.71 kW/TH/s
S5 (orange): approx released December 2014, power consumption 0.51 kW/TH/s
S7 (green): approx released Aug 2015, power consumption 25 kW/TH/s
S9 (blue):...