[bot403]

I can't see how this could be true. Many people will need to drive the ev to work during the day, and if you discharge it at night then when are you really charging?

It may be true for some who WFH often or in some cases, but not enough EVs will be able to discharge overnight for a v2g battery revolution.

[djaychela]

You're not left with a flat battery at the end of the night. Many vehicles are combined in intelligent systems which work together to ensure that the vehicles have the energy they need (which is easy to set in all the systems I've seen) but provide enough grid support to make this work.

Remember that even my little town car (Renault Zoe) has a 52kWh battery.... which would run my house for five days. So the energy stored in these systems can be considerable.

The people doing these things have thought a lot about it. Take a look at this video - it's a bit 'puff piece' but shows what one way of doing it looks like:

https://www.youtube.com/watch?v=fKItLGPdN0k

[audunw]

There are several scenarios where it would contribute:

1. You have access to a charger at work 2. You’re retired 3. You take public transportation or bike to work (fairly common scenario in Europe) 4. Work-from-home (got more common after covid, I know many people who do it at least once a week now, and that’s generally enough to charge what you need to drive for a week) 5. You charge only during the day on weekends (should be enough to cover the week for most people, even if you feed say 20% of it back to the grid through the week) 6. Rental fleet operators (booking data can inform charge/discharge policy) 7. Residential batteries, where you charge the EV at night with what you got during the day, every day, but set up a policy where you allow both the home battery and the EV battery to discharge if the electricity is expensive enough. I could see myself making decisions about WFH or biking to work based on electricity pricing.

[andyferris]

Ideally in that case you’d charge the car from the grid during the workday, when the grid is powered by solar and power spot prices are low.

BYO house solar is optional when there is grid solar (and home solar exports).

[zmmmmm]

Yes, it does rely on charging infra rolling out - either at work or with fast DC charging. But that is happening too. Well, in markets where EV adoption is encouraged - for the US, I guess we'll see.

[Mashimo]

I think peak energy usage is in the morning and afternoon / early night when people are at home.

Would be stella if people could charge during noon. I don't know how feasible that is.