I am new to the whole electric charging world, and was hoping someone could answer a simple question. When I look at the usage information on my car (swipe left from the tire pressure tab) , it says I drove 1,400km and used 227kw..
Now, my electricity provider charges around $0.10/kw...so to calculate how much I paid to charge my car for the first 1400km would be 227km x 0.10 = $22.70 for 1400km...
Is this accurate? Anything I'm missing here? Thanks in advance.
The usage tab information is useful for gauging your driving efficiency. It shows you used 227kWh to drive 1400km. It does not consider cost since this will vary whether you charge at peak times, off peak times , at work, at a free public charger or using a solar array.
The usage display does not factor in any kWh used for preconditioning before driving or if you leave the climate control running while you are parked and run a quick errand.
If you are charging at 240V then a good estimate of the overhead losses due to heating of the wiring, the battery and the onboard charger losses is ~10%. I.e., you will use 11kWh of electricity for every 10kWh that actually goes into the battery.
To determine your actual usage, cost of home charging you would need at home charging equipment that tracks usage or a smart meter. Straight up your Wh/km number is 227kWh/1400km or 162Wh/km. (I think in terms of Wh/mile; this is 259Wh/mi, a very respectable efficiency number especially in late winter.)
Without know whether you regularly precondition your Tesla vehicle before driving it is impossible to know your total kWh usage for charging and preconditioning and just sitting in the Tesla with the climate control running. I would conservatively add 40% additional kWh usage to account for overhead losses and for these activities. Even accounting for the additional 40% for preconditioning, your cost is approximately $0.0225/km ($0.036/mile.)