S9 would not profit if your daily operating cost is above USD0.13/kWh, just enough to cover operating cost / break-even to cover electricity/cooling etc.

See example below :-

(TH/s) / Opex (USD/kWH) / Profit (USD/D)
13.5 / 0.10 / 1.43
13.5 / 0.11 / 1.04
13.5 / 0.12 / 0.66
13.5 / 0.13 / 0.27
13.5 / 0.14 / -0.11

* Assumptions : Current yield of USD0.39/(TH/s), power of 1580 Watt/S9.