aviators99
Model S - R140
This is total speculation on my part, but there probably would be a residual value in your original pack that Tesla would use to offset the price of a brand new pack, so your net cost may not end up being $45k (or what ever the total price is of a new pack at the time of purchase). Now the question is, would Tesla first charge you the entire price of a new pack and then have you wait for a credit to show up? If so, then it would be pretty tough to run the credit card model on a swap station. It would still be a stretch if say Tesla offered a 50% residual rebate on your existing pack in a swap. That would mean a current price of about $22,500. While I'm sure some owners have individual credit card limits that high, I'm also sure a great many others don't have such a high limit available.
It will be interesting to see what develops over time. The intersection of Tesla with SolarCity will add an interesting economic wrinkle to this whole venture with the potential for SolarCity to utilize older battery packs in their backup power installations.
Well, just so you know...they didn't offer me anything for my current pack.