Quote:
Originally Posted by Steve W
That must explain why there are so many used and rebuilt Porsche lithium batteries and rebuild services listed on Ebay. That issue must be unique to the Porsche BMS if it locks you out if it drops below a certain level. The BMS systems in aftermarket lithium batteries don't do that. If anything, if it drops below a certain level, it will disconnect to protect the cells, but will reconnect upon recharge (most), or by pressing a reset button. You want that cell protection because if just one cell gets completely discharge, it cannot be recovered.
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Yes - regarding the eBay comments.
The Porsche OEM LiFePO4 lithium battery was sourced by Porsche from a supplier in South Korea. Given all of the problems and inconvenience that battery caused (Porsche as well as their customers), the new Cayennes no longer come with them.
(I had a 2019 Cayenne that had that battery; suffered the failure; and subsequently was replaced - under the emissions warranty by Porsche. Others were not so fortunate and had to pay out of pocket for the replacement battery, programming of the vehicle and installation - about $2,200 or so.) My 2024 Cayenne came from the factory with an AGM battery.