acbytesla
Penultimate Amazing
- Joined
- Dec 14, 2012
- Messages
- 39,406
Yeah, I know the charging slows down a lot as it gets closed to full.I think it's a reasonable point. I haven't seen anything about not draining the battery regularly, but then I haven't read every word of the bumph that came with it. There's no doubt that LFP batteries are pretty robust, and it's also true that there are built-in protections, but maybe it is wise to be a little more cautious.
Nobody is going to be charging their EV up when it gets to 50%, that's for sure. It's bonkers. Especially as it is recommended not to charge NMC batteries above 80% routinely, and everybody is advised to unplug at 80-85% on a DC charger and get going because the top of the charging curve is so slow. What would your range be? 50 miles? People who know their cars and can calculate their range regularly drive below 10%. They seldom leave the cars there for any length of time though, because obviously you want to get on, or at least you want the car ready for next day or even an unexpected trip. So I'm not sure why I should treat my home battery any different.
You can go on the Out of Spec Motoring YouTube channel. It's all about EV motoring in the US. I might have the year and model of his Tesla wrong. It might be older than that. Nevertheless, he told me that range is half of what it was when he bought it.Your story about the Tesla driver only having 50% SOH in a 2018 car is not credible unless there was something very wrong with that battery. These cars have a battery warranty of eight years, that triggers if the SOH falls below 80%. YouTube is crawling with people looking at old cars and being amazed by how well the batteries have stood up. Even old Leafs, which are notorious for degradation as they didn't have thermal management. I have never heard of an EV with a battery SOH as low as 50%.
In a series of 4 episodes, 10 different cars with teams of 3 drivers race 3,000 miles from Seattle to Boston. 9 EVs including a new Model 3, a Tesla Model S Plaid Edition and a 2013 Tesla. The 2013 came in last by almost 2 days. See, the 3:04:00 point. 11 year old car with 1/3 to 1/2 the battery capacity.
.
Of course not.People are already using their EVs to run their houses. Leafs are particularly favoured for this. VtG is going to see cars partially charged and discharged a lot as their batteries are used to buffer the grid. There is honestly nothing to worry about. The issue about old EVs (Leafs, Zoes and the like) is that they were built with small batteries and people want more than that now that it is available. Not that these batteries are spectacularly less capable than they were when they were new. Yes there is some degradation, and yes this is more of a worry when you only had 90 miles of range to start with, but imagine a car with 300 miles of range. Its battery is technically "end of life" when it reaches 80% SOH.
But it still has 240 miles of range? Would you think that car was useless? But the fact is that even today's batteries aren't getting down to 80% SOH in their first ten years, and this is only going to get better.
Good luck with that.But now, update on my home battery. I set it to export with an export limit of 10%. And it went right on exporting until it hit 5%, which is as low as it wants to go under normal circumstances. I have no idea why this was. It usually does what it's told, but not this titime.




