No BTC price boost means only cheap power mining makes profit.
Coins were 19990
Coins are 6750
an s-9 earns about $3.56 a day
power cost at 10 cents is about $ 3.41 a 15 cent profit.
power cost at 9 cents is about $ 3.07 a 49 cent profit
power cost at 8 cents is about $ 2.73 a 83 cent profit
power cost at 7 cents is about $ 2.39 a $1.17 profit
power cost at 6 cents is about $ 2.04 a $1.52 profit
power cost at 5 cents is about $ 1.70 a $1.86 profit
power cost at 4 cents is about $ 1.36 a $2.20 profit
power cost at 3 cents is about $ 1.02 a $2.54 profit/b]
note 4 cent power in big scale 100 mega blocks is pretty easy to get.
and each s-9 make about 2.20 so at 440 for a s-9 with a psu a 200 day payoff add 30 days for a 15 percent dead gear rate and
buying 80000 s9's sounds good
The solar array that buysolar owns is pretty much paid off. we estimate 1 cent a kwat to maintain it.
So we sound be good to go well the problem is the size of the array is 200000 watts which is 33.3 kwatts 23/7/365 at a penney
which is about 20 s9-s.
or 20 x 3.56 = 70 a day - 7 = 63 a day profit and it shrinks with more diff growth.
so even a 1 cent power setup struggles due to expansion and diff increase.
5 cent power = $1.89 profit
4 cent power = $2.20 profit
3 cent power + $2.54 profit
so anyone paying 480 for an s-9 + psu with 3 to 5 cent power does just fine.
since bitmain is selling a s-9 with a psu for 499 and giving a 55 dollar coupon they are charging 444 + shipping
asic mining is thriving if you have 4 or more megawatts at 4 cents
that is 280 s-9's which means you are earning $616 a day all your gear is paid off in 280 days and you have a cash profit of more then 30000 usd