When those wheels are parked and the car is plugged in, that power capacity can be available to the grid. In his testimony, Brooks described how the electrical equipment on board electric vehicles can serve double duty, powering the car, typically for just for one or two hours a day, and supporting the power grid the rest of the time. Once you have several thousand vehicles, they add up to a significant generating asset. Since the power generation is close to the power consumption, you reduce congestion on the grid too. When parked, they can generate power with zero or almost zero emissions.
Electric vehicles are an ideal source of reserve capacity.
Once California has several thousand EVs on the road, the vehicles can supply a chunk of the reserves needed by the ISO and earn a handy profit for their owners. We know of at least four auto companies that are looking at using vehicles to make AC electricity. I would bet that most auto companies are looking. The electricity situation in California right now is serious, but the ZEV mandate won't have any negative effect in the near term. For the longer term, putting electric vehicles on the road offers the potential to help solve California's electricity problems.