Battery Health
Discussion
I checked my battery stats via OBD and Car Scanner Pro
I’ve owned the car for 15 months and covered 18,000 miles
Battery health is at 99%
Even if the rate of wear continues at this rate (degradation is normally worst in the first year) that will mean it takes until 540,000 miles for the battery to degrade to 70% capacity.
99.4% of the time the car has been AC charged, the rest DC. That might help to explain the very low battery degradation.
Total time spent DC charging over 15 months was 8 hours (although a lot of that was discretionary ie I left the car plugged in because I was shopping or eating, the real additional time spent was more like 4 hours in 15 months)
Cost £226 (DC) plus £491 (AC) assuming 80p/kWh DC and 8p/kWh AC
Total £617 for 18,000 miles
For my previous 911 18,000 miles would cost around £5,560
By cost the EV is effectively doing 200mpg!
Average efficiency 2.8m/ kWh
The battery is at 68% and outside temp 9 degrees with 716 nM of torque available.
All the cells are at exactly 3.86v
The battery is warrantied to retain 70% charge capacity at 7 years. I estimate mine will retain at least 94% capacity by then. At my current (more than average) annual mileage, it will take until 38 years for the battery to degrade to 70%, at which stage the car would still be perfectly useable, even for me. I only charge to 80% so as the battery wears I could charge to 90 or even 100% to compensate if I needed to.
So the bottom line is that the useful life of the battery is likely to far exceed that of any petrol or diesel car.
A used EV is going to be a great buy!
I’ve owned the car for 15 months and covered 18,000 miles
Battery health is at 99%
Even if the rate of wear continues at this rate (degradation is normally worst in the first year) that will mean it takes until 540,000 miles for the battery to degrade to 70% capacity.
99.4% of the time the car has been AC charged, the rest DC. That might help to explain the very low battery degradation.
Total time spent DC charging over 15 months was 8 hours (although a lot of that was discretionary ie I left the car plugged in because I was shopping or eating, the real additional time spent was more like 4 hours in 15 months)
Cost £226 (DC) plus £491 (AC) assuming 80p/kWh DC and 8p/kWh AC
Total £617 for 18,000 miles
For my previous 911 18,000 miles would cost around £5,560
By cost the EV is effectively doing 200mpg!
Average efficiency 2.8m/ kWh
The battery is at 68% and outside temp 9 degrees with 716 nM of torque available.
All the cells are at exactly 3.86v
The battery is warrantied to retain 70% charge capacity at 7 years. I estimate mine will retain at least 94% capacity by then. At my current (more than average) annual mileage, it will take until 38 years for the battery to degrade to 70%, at which stage the car would still be perfectly useable, even for me. I only charge to 80% so as the battery wears I could charge to 90 or even 100% to compensate if I needed to.
So the bottom line is that the useful life of the battery is likely to far exceed that of any petrol or diesel car.
A used EV is going to be a great buy!
Edited by 740EVTORQUES on Saturday 27th April 11:44
)OldGermanHeaps said:
Battery wear isnt linear.
I said thatThe wear is greatest initially then slows down normally. Following a relatively linear phase there is then accelerated wear later in its life cycle.
My use probably overestimates the degradation as it includes the early steep drop off, but of course then moves to the more linear phase. Even when the wear starts to accelerate, I’ve already got a 20% buffer that I don’t regularly use to compensate so there’s a fair margin built in.
https://www.evengineeringonline.com/how-does-ev-ba...
https://www.geotab.com/uk/blog/ev-battery-health/#...
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