The spinning energy MUST be consumed. Otherwise the turbine will accelerate until it breaks, what may take a block away from some city.
Powering down generators take some time, and powering them back up costs quite a bit (both vary widely from one tech to another). For short durations it is just cheaper to pay somebody to take the energy.
Powering down generators take some time, and powering them back up costs quite a bit (both vary widely from one tech to another). For short durations it is just cheaper to pay somebody to take the energy.