What does 0% charge actually mean?

[Sudinator]

Does anyone know when the battery is at 0% does that include the fact that it has used up the 12kW of reserve power that is NOT available for us to use? I suppose conversely if we are charging to 90% then it that 90% of the useable battery or the total battery?

If a premium AWD w extended battery is supposed to go 270 miles on a full charge - well that full charge is 88 kW (I think) so that implies ~3 miles / KW which makes sense to me. So if the battery now reads 0% then does the car still have ~12 kW of battery still left?

Sponsored

 

[hybrid2bev]

Does anyone know when the battery is at 0% does that include the fact that it has used up the 12kW of reserve power that is NOT available for us to use? I suppose conversely if we are charging to 90% then it that 90% of the useable battery or the total battery?

If a premium AWD w extended battery is supposed to go 270 miles on a full charge - well that full charge is 88 kW (I think) so that implies ~3 miles / KW which makes sense to me. So if the battery now reads 0% then does the car still have ~12 kW of battery still left?

The only thing you are going to see on the dashboard is usable battery. 0-100 displayed is all usable. Charging to 90% is charging to 90% of useable not total battery capacity.

At zero displayed SOC there is still power left in the battery but you cannot access it. It's there to keep you from bricking the battery, it's not "reserve power". The battery buffer is split between the top end and bottom end. So you cannot ever charge to 100% or discharge to 0% of total battery capacity.

 

[RickMachE]

And the total battery is 98kW, not 100. There isn't 12kW unused, there is 10kW.

 

[SnBGC]

Does anyone know when the battery is at 0% does that include the fact that it has used up the 12kW of reserve power that is NOT available for us to use? I suppose conversely if we are charging to 90% then it that 90% of the useable battery or the total battery?

If a premium AWD w extended battery is supposed to go 270 miles on a full charge - well that full charge is 88 kW (I think) so that implies ~3 miles / KW which makes sense to me. So if the battery now reads 0% then does the car still have ~12 kW of battery still left?

For sake of simplicity....
Let's pretend the usable capacity is 90% of the physical capacity. 98 kW x 90% = 88 kW (ish)
Let's pretend that 10% reserve is allocated evenly between the bottom and top end.

When your S.O.C. display reads 0%, then the actual battery charge is 5%. You just can't use any of it.
When your S.O.C. display reads 100%, then your actual battery charge is 95%. You aren't allowed to charge up that last 5%.

The actual figures are slightly different but the concept is the same. I hope this helps.

Sponsored