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.
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:
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.
BYO house solar is optional when there is grid solar (and home solar exports).
Would be stella if people could charge during noon. I don't know how feasible that is.