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Note also the 10 GW of "Controllable Charge Load". Considering the audience, this is signaling an interest in selling aggregated control of charging to utilities. The math is simple. 1 million cars need 10 kWh per day and if the utilities support it, they can each charge at 10 kW or higher. So this is daily demand for 10 GWh and can provide 10 GW of load. This is like being able to absorb the load of 10 nuclear power plants. It has the potential to preserve the value of baseload generation assets for utilities. So if utilities want to play, policymakers can accomodate. This would give Tesla and Tesla owners an additional revenue stream to offset the cost of EV ownership. Try to imagine a financial product whereby the value of this revenue stream would flow to Tesla in such a way that the upfront sticker price could be reduced. Perhaps this could knock off about $1000 off the price of the car. This sort of thing could make a real difference as we move into Gen 3 economics.
Well there is also some sort of pilot going in the Netherlands. Tesla owners can opt in for a program where the utility controls charging of their car overnight in 15 minute blocks. Correspondingly they get a rebate on electricity consumed during that period. Unfortunately since the charging protocols between car and charger aren't developed enough this can only be accomplished by giving the utility the login to your remote Tesla. But it does show there is an active interest from utilities.
If the grid could signal desired charging rate and could query cars how much supplemental load they can still absorb, it would go very far in helping power distributors manage grid wide fluctuations without having vehicle to grid capabilities (which, I think, car manufacturers are not interested in due to the extra strain on their battery)