I suspect many users will be happy with their car down to half the usual range (ie. the 700 cycle mark). Even if the original owner isn't happy with this, they can resell to someone needing less range.
After that, there really aren't many cycles left in the battery before it gets to zero. Remember that cycles aren't the only thing degrading batteries - simply storage also causes degradation, so even utilities who rarely have to make use of their batteries (eg only once per week) might only see a year or so use of the cells. I doubt that pays for the installation cost.
http://www.calce.umd.edu/batteries/pics/dcir.png
I suspect many users will be happy with their car down to half the usual range (ie. the 700 cycle mark). Even if the original owner isn't happy with this, they can resell to someone needing less range.
After that, there really aren't many cycles left in the battery before it gets to zero. Remember that cycles aren't the only thing degrading batteries - simply storage also causes degradation, so even utilities who rarely have to make use of their batteries (eg only once per week) might only see a year or so use of the cells. I doubt that pays for the installation cost.