AllElect2015
New Member
Just joined and would appreciate some insight. Received my 85 Model S about 3 months ago (2015 lease return). Since then put on 1225 miles using 400 kWh so the rate is 326 Wh/mile. I'm good with the math there. What I am trying to understand is I charged to 245 miles but when I had driven 154 miles battery said I only had 31 miles left. Usage rate since my last charge was 354 Wh/mile during this last time so a little higher than average. But the way I calculate it, if I charge to 245 miles of a 265 miles stated range for car then I am at 92% (245/265) of the battery which is 85K so I would estimate I was at 92% of 85K or 78,2K of energy to use. If I drove 154 miles at 354 Wh/mile then I used 54.5K of energy and I should have had the difference 78.2-54.5 or 23.7 K left of charge. At 354Wh/mile the 23.7K of remaining charge should have allowed me to drive another 66.9 miles not the 31 miles the car reflected. Where is the error in my logic? Thanks