Power is not the limit it looks like
Ten cars in a company car park do not need ten times the power of one. They sit still for eight hours and none of them arrives empty: most only need to replace the commute from home to work. With dynamic balancing, the system shares the available power between the connected cars and respects the limit of the supply.
In practice, most companies take far more points than they think without touching their contracted power, which is where the real cost sits.