Aren't people wary about using their very expensive car batteries for the grid? E.g. imagine you plug in your phone for the night, but instead of a single top up change it is now constantly discharging and charging again. Lifetime of pocket sized batteries is not too great even now, and in such scenario they will go bust 2-3 times faster, in year instead of 3 or so. Also discharge swings would be probably much bigger. Instead of using say 30% of the battery per day in normal use cycle, maybe not even every day, you will now see multiple 0%-100% charge cycles daily.
New battery for small car costs 13-20k$, so if its lifetime will be shortened from I don't know, say 10 years, to 3 years, then electric company need to compensate owners accordingly and I highly doubt they will pay even 10% of that sum over 3 years.
New battery for small car costs 13-20k$, so if its lifetime will be shortened from I don't know, say 10 years, to 3 years, then electric company need to compensate owners accordingly and I highly doubt they will pay even 10% of that sum over 3 years.