WOW that is crazy! What kind of electrical problems or symptoms were ya having?
It all started in August 2020 - the car couldn't charge. They replaced the chargeport, and while in service the MCU failed so that got replaced as well. Both covered by ESA (I paid deductible).
My car has dual on-board chargers and after the chargeport repair, I noticed that the car no longer could charge past 40 A. Back to service - they found an internal fault with one of the onboard chargers, had to order the part. While it was there they replaced the lower rear control arm assemblies which are a known problem for certain cars this age.
Finally the part showed up and got replaced under ESA (another deductible).
About a month later, I got in the car and it gave me piles of warnings - "Park Assist Unavailable", "Stability Control Disabled", "Regenerative Braking Disabled", "Steering Assist Reduced", "Safety restraint system fault", "Traction Control Disabled". The car then completely bricked - headlights on, can't use touchscreen, nothing responsive. It got towed to service with the headlights shining into the cab of the tow truck! This time,, according to the work invoice - "the TPMS sensor module shorted at the ground internally, and brought down the entire network, resulting in vehicle not drivable". So I got upgraded to the newer TPMS sensors for the cost of an ESA deductible.
Less than 2 weeks after getting the car back from that repair, once again it shut down when I got in it to drive. "Unable to Drive - Voltage Supply too low", "Electrical system power reduced - Vehicle may shut down unexpectedly", "Power Reduced - Vehicle systems shutting down". Towed again to service. After two days the diagnosis was that the DC to DC converter was shot and had to be replaced. Not only that but it had to be retrofitted to a gen 2 system (mine was gen 1). It took nearly a month to get the more than 40 parts required for this work. In the end I lost several inches of frunk space too since it needed to get rebuilt to fit the updated DC DC converter. Covered by ESA, paid another deductible.
Less than three weeks after getting the car back I was driving through a mountain canyon road at night and both headlights failed suddenly. I was able to turn on the hazards and that provided enough light to see the road and slow down and pull over. After flipping the lights to Off and back to On and Auto a few times they came back and I was able to finish the drive. Back to the service centre (at least it didn't need a tow this time). They replaced both headlights - of course again under ESA and another deductible.
3 weeks after the headlights, I was picking my son up from school and the car shut down at the side of the road - "Service is required", "Acceleration and top speed reduced", "regenerative braking disabled", "Unable to drive - voltage too low", "Vehicle may not restart - Service is required", "Electrical system power reduced - vehicle mat shut down unexpectedly". Then the large screen went black, and the car froze, unable to do anything. I called roadside and they sent a tow truck which took 2 hours to arrive. I was a 45 minute drive from home through mountains when this happened.
I had been complaining for months that I thought there was a problem with the battery - it had been refusing to charge at all at moderately low temps of 2-4 C. It could not precondition for supercharging at all. The only way I could get the battery to charge at a normal rate was to drive it hard to heat it up, then immediately charge. Regen was almost never working fully, even after an hour or more of driving. This had been going on for a couple months during all of this and they kept saying they didn't see any problems from the logs and that should be expected in low temps. I've had this car through 7 BC winters in mountain driving and it had never behaved like this. Anyhow...
This most recent time they diagnosed as "HV battery required replacement due to an internal fault". They gave me a new battery - this time covered under the original warranty, yay no deductible!
I just picked up the car a couple hours ago and it seems fine. It felt like a whole new car - acceleration and power draw were great - regen working properly, so fun to drive! The battery was charged to 86% and showed range of 408 km. My previous one was topping out at 405 km when charged to 100%, so I definitely got a bunch more range from this one.
Since mid December I think I've been driving loaners more than my own car. If I get through the next 3 weeks without another electrical meltdown of some sort I'll actually be surprised.
Fingers crossed this is the last of my problems. My 8 year battery warranty as well as my ESA expire on Oct 14, 2021 - not sure I want to keep this thing at all once it's out of warranty. Maybe having a new battery (plus all of those other new parts) will help resale value - it actually has more range as of now than the day I took it home nearly 8 years ago.