I am thinking of investing about value equivalent to 1BTC at today's price 16.K in a dedicated solar power panels at my roof and use the energy produced for mining bitcoins.
If I buy second hand miners with 200TH hash power included in the package, how I would calculate time of investment return?
well assuming you can get 10 k-watts for 14000 you only have the power to run
10000/5 =2000 watts 24/7
best case.
or
10000/6 = 1667 watts 24/7. you can get a used s19 for 1500 use braiins down clock it to burn say 2000 watts gives you around 60th
that is 60 x 7 cents = 4.20 a day or 4000 days to break even
that is 11 years.
I also left tons of constants.
7 cents a th in earnings constant
difficulty constant
16k for a coin constant
I left out all the incentives you government may give you for having the solar panels.