Re: Braiins OS: open-source mining firmware [S9, T1]. New release includes AsicBoost
I agree. Might be really fun. 
In your case, when electricity is free (at least up to 40 kW), I do understand your reasons as you can run a certain amount of miners up to 40 kW. Until you reach 40 kW you can just add more miners and if you reach 40 kW you just remove a few. In this case the only thing that matters is minimum W/THs (if you already have enough miners and don't need to take miner investment costs into the calculations). With the 13 cents/kW the situation is probably pretty much the same.
In my case with my electricity costs the fact is that the only reasonable thing to do would be to just unplug and buy the bitcoins. The BTC I'm mining at the moment I would need to sell at 5.500 (with present difficulty) to even break even and at present BTC price I would get not far from double amount of BTC buying instead of mining.
Sad but true.
BR.
Steff
In your case, when electricity is free (at least up to 40 kW), I do understand your reasons as you can run a certain amount of miners up to 40 kW. Until you reach 40 kW you can just add more miners and if you reach 40 kW you just remove a few. In this case the only thing that matters is minimum W/THs (if you already have enough miners and don't need to take miner investment costs into the calculations). With the 13 cents/kW the situation is probably pretty much the same.
In my case with my electricity costs the fact is that the only reasonable thing to do would be to just unplug and buy the bitcoins. The BTC I'm mining at the moment I would need to sell at 5.500 (with present difficulty) to even break even and at present BTC price I would get not far from double amount of BTC buying instead of mining.
Sad but true.
BR.
Steff