My current transfer fee is 0,03€/kWh. There is also the electricity tax (0,028€/kWh) and energy sales commission (0,004€/kWh). With hourly energy rate of -0,50€/kWh any usage will lower my energy bill for the current month even considering all the above costs.
Ah thanks. The rule of thumb "you don't earn" applies to "ordinary" negative energy prices caused by favorable weather. Obviously here the price was so extreme that old wisdoms no longer apply.
Myself I enjoy the comfort of a fixed rate contract. No efforts in trying to optimize consumption profile over days and weeks.
