Vehicle-to-Grid Charging.

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JejuSoul

JejuSoul

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Six Soul EVs Will Be Used to Help Develop and Demonstrate Vehicle-to-Grid Smart Charging Software Algorithms at the University of California, Irvine (UCI). see http://www.kiamedia.com/us/en/media/pressreleases/11526/kia-motors-america-provides-electric-vehicles-to-the-advanced-power-and-energy-program-at-the-univer

My own opinion is that this will never work. Dynamic shaping of the charging to the car is possible, but it makes no economic sense to charge the grid from the car.
 
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There never was any follow up to the press release above.
The research article that came out of it was probably this one.
Assessing the stationary energy storage equivalency of vehicle-to-grid charging battery electric vehicles

The main conclusion I get from this
Vehicle-to-grid-based energy storage has less overall flexibility compared to stationary energy storage.
Click to expand...
It is better to buy a Powerwall as battery backup than try to use your car.

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There's an interesting talk about the battery survey results collected by Plugin America. here -

https://www.youtube.com/watch?v=WLUUfmRkRcA

His talk is very cautious and careful not to dramatise the results. You only get a sense of possible negative data in the Q and A at the end.
I think the most interesting part of the talk is his analysis of the cost of battery deterioration per kWh throughput. He suggests a cost of 40 cents for each kWh cycled through the battery. He uses this to inform the economic reality of using V2G.

For our Soul EVs, if hypothetically a replacement battery costs $6,000USD and lasts only 1000 cycles (160,000km) then the cost of battery deterioration per kWh throughput is about 45 cents.
 
Here an article about V2H and some calculations if EV or Powerwall is more interesting.
This article is of course very dependent on the electricity tariffs.

The use of a V2H enabled charger can reduce the electricity bill by up to 85% with the Nissan Leaf 2018, compared to just charging the EV without using V2H and the Time-of-use tariff. A minimum of 30% reduction in the total electricity price can be achieved while using V2H regardless the tariff or EV used, compared to just charging the EV without using V2H. Moreover, a 50% reduction in the total electricity cost is expected when adding a battery to the household regardless of the tariff or battery used, with up to 85% reduction when using the Tesla Powerwall 2 and the Time-of-use tariff when compared to not using a battery.

For all the tariffs analysed in this paper the SOC behaviour of the Nissan Leaf 2018 is similar to the Tesla Powerwall 2, where the Tesla Powerwall 2 presents a steeper charge and discharge behaviour due to its lower energy storage capacity when compared to the Nissan Leaf 2018.
Click to expand...
 

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