Pete UK
Member
The benefit is if the replacement battery has higher energy density. The oldest Leafs can be fitted with a newer battery (relatively easily - unplug the old, plug the new in - if rather expensively) and get a huge increase in range (and of course get back the degradation that Leaf's are notorious for)
Whether that will be a thing for cars such as Tesla that have a much greater range battery I think is debateable. When I changed mine I went from 250 to 300 (true motorway) mile range - and sticker-price was 20% less too I'm happy with 300 mile range, I have very few out-and-back UK journeys that need more, so whereas my Supercharge usage was a couple of days a month now it is only for longer trips - i.e. exceeding 300 miles - typically journeys which are drive-charge-drive-charge
Higher density batteries will have less weight (for a given range), so if the replacement is "same kWh" it will have more range due to less weight.
But batteries are very expensive, so I'm sceptical there will be demand (unless the battery is knackered for some reason). Battery will be good for 150K miles, probably stretch to 200K miles with perhaps a tolerable amount of degradation ... by which time the rest of the car is going to pretty old / worn, so in most cases the car may well be pretty knackered by then. Lifetime cycles of batteries is increasing - next generation will be million-mile - maybe the need will be for a replacement frame, rather than replacing the battery!
All very interesting. (Probably hijacked the thread a bit here, so apologies). Yes it would be lighter and hence improved range (and cheaper for Tesla!) - forgot about that. And, as you say probably largely irrelevant, as the rest of the car will be pretty "tired" by then. I was kind of thinking about what happens if the battery has an issue that means it needs to be replaced and it was just out of the Y's 8 year warranty. There could be a fair few low mileage users whose cars aren't thrashed about like 150,000 mile Rep-mobiles and only do 5,000 miles a year. Would it be considerably more expensive to replace if it was a structural battery instead of the current on one the Y? I'm just kind of pondering the thought and don't really have any knowledge about it.
You say you replaced a battery already. What model was that on? an S? and can you explain a bit about what happened and why it needed replacing? Was it under warranty or not?
Thanks in advance.