Cut to today (a few weeks later), and I'm getting mixed-signals. I tried doing a calibration several times by allowing the battery to fall to <20% twice before charging back to 100% in a single session. But each time, the SOH remained unchanged. Then on the third attempt, I took the battery to ~10% and when it finished charging, the SOH re-calculated to 61%. I suspect that the SOH prior to purchase was outdated (drive history confirms that the car sat mostly-undriven in the dealer's shop for over 3 months). So perhaps this was the first full cycle it's had in a while. The GOM range hasn't changed much (it's actually gone up a few mi, likely due to careful driving performance).
I'll let the car get another calibration in to confirm my findings before heading into the dealership for an in-warranty repair. But before I do, I just thought I'd check in with this community since you've offered such good advice so far.
- It appears from other threads that 2015 EV batteries are getting replaced with refurbished units rather than new. This is reasonable, so no complaints from me. Should I expect a 27 kWh or 30 kWh pack if this is the case?
- Do refurbished batteries degrade more quickly, more slowly, or about the same as new batteries? My driving and storage conditions will be pretty ideal for an EV (garage-kept, low-speed driving).
- How much push-back should I expect from the dealer? Will they require repeat-visits and troubleshooting before allowing the replacement?
- How long should I expect to be without a car if I take this in? Will I be allowed to keep driving it while they order a new battery? My impression is that it takes several weeks to arrive here.
- Is there anything else we know about the battery replacement process which would give me reason to delay the replacement - such as if for some reason they started using newer (2018/2019) batteries to replace 2015-2017 models? I know this might be a pipe-dream, but why not ask?