Apparently the typical pattern is a rather quick drop in battery capacity and then a leveling off. I believe 10-15% degradation at 200K miles is not unusual. There are apparently some Teslas still on the road with over 300k miles.
The average cost of the Tesla superchargers is 28 cents per kWh or about 2x what it costs to charge at home (14 cents per kWh around here). If you figure about 250 Whs per mile then the cost is 7 cents per mile for a Supercharger or 3.5 cents per mile when charging at home. YMMV. This makes the cost of a Tesla supercharger to be equivalent to paying $2.80 per gallon for gas (about the current price at the pumps) for a gas car that gets 40 mpg or about $1.40 per gallon if you are charging at home. Since most Teslas are mostly charged at home, the cost of driving is less than gas cars. The MPGe rating of over 100 is another indication of this. I am not sure where you got the $8 per gallon figure.
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Originally Posted by TCNY61
Just read my latest car and driver magazine. Their long term Tesla has about 21,000 miles and the battery is down 7% capacity already probably from the quick charging. Also the cost of the quick charge stations works out to the equivalent of $8 a gallon. I don't look forward to electric vehicles!
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