So here are the totals for drives from 9/10/20 to 1/16/21. The 262 Wh/Mile seems pretty spot on with the rated 260 Wh/Mile by using 964 kWh over the 3685 miles driven. However, when I look at my total charging costs over that same period of time, it shows about 1347 kWh added. Where is the 383 kWh difference going? Is that all pre-heating / warming the battery? That seems like a lot of energy towards that. If I use the 1347 kWh added as "actual energy" added over that period of time, I only get 366 Wh / Mile.
It gets worse because the 1347 added assumes 100% charging efficiency. When I download the charging data and sum up the "kWh used" I get 1555 kWh (about a 87% charge efficiency. I charge at home using my Tesla Wall Connector at 13A). That drops the "actual energy" used to be over 3685 miles driven to be 422 Wh / Mile.
Is my math right? Are folks using TeslaFi seeing the same thing? Are the real world energy costs actually that much higher than the 260 Wh/Mile being advertised?
It gets worse because the 1347 added assumes 100% charging efficiency. When I download the charging data and sum up the "kWh used" I get 1555 kWh (about a 87% charge efficiency. I charge at home using my Tesla Wall Connector at 13A). That drops the "actual energy" used to be over 3685 miles driven to be 422 Wh / Mile.
Is my math right? Are folks using TeslaFi seeing the same thing? Are the real world energy costs actually that much higher than the 260 Wh/Mile being advertised?