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I just figured that the 'extra' 15kW would be charged/cycled just as much as the rest, resulting in less cycling overall per battery over say 10yrs. Shouldn't this pack have less degradation then the original 60kW packs? Sounds logical, but I'm far from knowledgeable in this area.One of the big issues to determine the actual answer to your question is that we don't actually know the State of Charge (SoC) range that is programmed into the software limiter. That determines the voltage range of the cells and that is one of the determinants of degradation.
I just figured that the 'extra' 15kW would be charged/cycled just as much as the rest, resulting in less cycling overall per battery over say 10yrs. Shouldn't this pack have less degradation then the original 60kW packs? Sounds logical, but I'm far from knowledgeable in this area.
if you charge its to 100 % ... its is not 100 % of the capacity on the battery ! ! !
I just figured that the 'extra' 15kW would be charged/cycled just as much as the rest, resulting in less cycling overall per battery over say 10yrs. Shouldn't this pack have less degradation then the original 60kW packs? Sounds logical, but I'm far from knowledgeable in this area.
I agree, given most people charge to 90% most of the time, that'd be 80% SOC used most of the time used everyday. If it's a typical ~60 mile commute like I have, I'd figure over the pack's lifetime=less degradation. Remains to be see how much of a difference, if significant at all.(Also not an expert.) Let's assume for now that a 60 limits the top end of charging. If your driving results in going below 10% more often because you got a 60, that's probably worse than charging over 90% occasionally. If however you max charge the 60 (which is 80% of the 75) and don't go below 20%, then yes you'd get the same degradation as a 75 staying between 80% and 20%. I think it's more likely that on road trips you'd end up driving into the bottom of the pack more often than if you had a 75 which is (supposedly) worse than charging higher.
Everyone is seeming to forget that Tesla will choose the best option that will give them the least amount of battery degradation for CPO resale later. Mark my words, the "70kw" battery will make a comeback on these 60kw that are traded back in.(Also not an expert.) Let's assume for now that a 60 limits the top end of charging. If your driving results in going below 10% more often because you got a 60, that's probably worse than charging over 90% occasionally. If however you max charge the 60 (which is 80% of the 75) and don't go below 20%, then yes you'd get the same degradation as a 75 staying between 80% and 20%. I think it's more likely that on road trips you'd end up driving into the bottom of the pack more often than if you had a 75 which is (supposedly) worse than charging higher.
On another thread a Tesla employee said that the 60 will have max voltage restricted so that all cells are used charged to approx 80%. He didn't know if the charging software would be written to give a charge curve mimicing an actual full charge.
On a side note, if the S60 is the same production price of an S75, that will mean the S60's profit margin will be ~12% less, right?
Yes, but Tesla would have only made this decision if after running the numbers of expected upgrades that they would come out even or ahead in the long run — which means the 75kWh packs are probably on-par cost-wise with the older 70kWh packs (if not somehow cheaper thanks to the magic of economies of scale).On a side note, if the S60 is the same production price of an S75, that will mean the S60's profit margin will be ~12% less, right?