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V2G in a robotaxi world

Buckminster

Active Member
Aug 29, 2018
2,993
14,890
UK
Apologies for opening up the V2G debate again but I need to get this off my chest.

Background to robotaxi model:
Tesla Network / Robotaxi Business Model

New discussion from Warren - 40 mins in:

Thought experiment 1:
100 million Tesla owned robotaxis plugged into the grid - either charging or discharging whilst waiting for a ride. 10 Terawatts of discharge capability that Tesla can call upon. My calcs tell me this could power the world for a 5 hour power outage.
This truly enables wind and/or solar only.

Thought experiment 2:
20 year old Tesla (Tesla owned) with 900k on the clock is parked at a lone charger servicing a tiny community as a robotaxi for 1% of the time and V2G for 10% of the time.

How is this not a good thing.

One reason why Elon has not yet fully committed to V2G is because he is waiting for robotaxi in combination with V4 supercharger etc. He is pushing Powerwalls for homes so that homes have emergency power in a world were we don't own the vehicle and therefore can't use V2H.
Something interesting I discovered today, relevant to the powerwall business...
This is a map of the hourly electricity price auctions in Europe:
I presume its price per MWH.
At 5am in the UK today, power was £1.90/MWH. At midday it was £60! I think its because it was SUPER windy early this morning, so our wind farms were probably going bananas at 5AM. Anyway... if I had a smart meter and a powerwall and a flexible tariff, I could have totally filled the car/powerwall at 5AM today and used that sweet cheap power all day...
Thats a HUGE price variance...
 

Doggydogworld

Active Member
Mar 4, 2019
1,525
5,823
Texas
V2G can make sense for consumer cars which sit parked 95% of the time. Smart charging at home and work is enough to always have a huge buffer for grid operators to use. The whole point of Robotaxis is to stay on the road 24x7, thus not really useful for V2G.
 

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