More charge than available capacity?

[jonjon808]

I'm sure I am not the first on this, but my 2023 4SCT ran down to 0% charge today on the way in to work (sort of by design, but did get a little squeaky towards the end). It took 4hr 15m at 20kW to get to 100%, but the charger says that it squeezed in 87.6kWh in that time, so almost 4kWh more than the literature says is the available capacity. I guess this will be down to losses between the charger and the battery, but 5% loss seems pretty significant

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[RacingDuck]

5 % losses is pretty good.

On DC chargers I'm seeing like 10 % (difference between BC consumption and calculated consumption)
But of course the AC is working hard to maintain temperature there.

 

[Boss Hogg]

losses and cooling

faster charging = more heat and more cooling power needed

 

[bn8959]

If you charged on a measly 1.2kW, your losses would be around 40%! There is around 700W base use before you even start putting anything in to the battery. As the charge rate goes up, you'll also get more used on cooling etc. 4kWh over a full charge seems as about a lower loss as you could get - maybe slightly less charging at 7.2kW.

 

[gtm]

I'm sure I am not the first on this, but my 2023 4SCT ran down to 0% charge today on the way in to work (sort of by design, but did get a little squeaky towards the end). It took 4hr 15m at 20kW to get to 100%, but the charger says that it squeezed in 87.6kWh in that time, so almost 4kWh more than the literature says is the available capacity. I guess this will be down to losses between the charger and the battery, but 5% loss seems pretty significant

Your usable capacity new was 86.7 kWh. See: https://www.taycanforum.com/forum/threads/?-baseline-for-hv-battery-soh-performance-battery-degradation-data-by-taycan-owners.12815/ Third paragraph of the first post. Your battery has degraded to some extent. Assuming a SoH of 92% on a 2023 battery gives you a usable capacity of about 80 kWh now. So right around a 10% loss for your charging session.

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