Charging rate of 11 kW, with efficiency of about 90%, means that the charger sucks around 12.2 kW of power from the grid, of which 1.2 kW is continually lost*, and only 11 kW is effectively being stored in the battery at any point in time.
I don't understand the mention about battery capacity (80 kWh, which would translate to around 7½ hours of charging at 11 kW, if a battery could charge at a uniform rate) or where the "9 kW lost" figure comes from.
*Which is probably useful to melt snow above the device, when installed outdoors on cold climates.
The Cayenne seems to need about 315Wh / mile. I assume a substantial number of them are sold in California, where rates are often above $0.50/kw. I think $1.50 would get you about 9 miles.
I drive a more efficient PHEV and spend much more than $1.50/day.
Average cost of electricity is around 18¢/kWh. $2 of electricity at 18¢/kWh is about 11kWh. 11000 / 315 = 34.9. The average US driver does about 40 miles of driving a day. Its a pretty close gut-estimate figure to a median US driver paying an average price per kWh with this particular car.
> I drive a more efficient PHEV and spend much more than $1.50/day.
Cool story bro. I drive a more efficient EV and spend less than $1.50/day. Isn't it fun to share anecdotes?
I don't understand the mention about battery capacity (80 kWh, which would translate to around 7½ hours of charging at 11 kW, if a battery could charge at a uniform rate) or where the "9 kW lost" figure comes from.
*Which is probably useful to melt snow above the device, when installed outdoors on cold climates.