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Why you not keep your A741 run 24/7? You keep turning on/off each 12hours?
Coz for 8 hours a day in the afternoon, except on weekends, electricity costs me almost 50c kW/hr
So I turn it off for at least those 8 hours ... though I didn't yesterday

Too expensive, 0.5$/kW! In my citi, only 0.05$/kW, but the weather is hot, so easier to kill my miners?
Do you plan to buy more miners?