His problem is that day, where he has the rigs is a workshop, and he can not have access to all the energy to run the rigs at 100%, and he wants to lower the OC so that the workshop and the Rigs work. And then at night increase the OC to the maximum you can to maximize income.

I suppose this kind of situation will happen to many people. It does not have to do with the price of electricity, only with electricity availability when sharing electricity with a house, a workshop etc ...