SageBrush wrote:GRA wrote:DaveinOlyWA wrote:

Teslaites complained so Mama T lowered the rates to 28 cents per k

Yup, a 10% decrease after a 33% increase. So, $0.28/kWh, divided by say 3 miles kWh (we're talking about SCs used for road trips, after all) works out to 9.33 cents/mile. If you have a Model 3 and can get 3.8 miles/kWh, that's still 7.4 cents/mile. At the U.S. national average of $2.25 & 3 m/kWh, if you get over 24.1 mpg, gas is cheaper. Here in California ($3.27) you need to get more than 35 mpg (44.2 for the Model 3 @ 3.8 m/kWh).

When I road trip my Model 3 LR I average 100 kW during charging, pay 28 cents a minute and consume 220 Wh/mile. That is true for the fraction of the trip not covered by my home charge or destination charging.

I'm curious, at what speeds do you get 220Wh/m, i.e. is this freeway driving at 75 or 80? 220Wh/m would be at the lower end of what I've seen for freeway road trips the 3LR on TMC, although I don't follow that closely.

SageBrush wrote:So e.g. if I start from home and travel 400 miles I pay $1.1 for the first 300 miles and $3.69 at the Supercharger for the last 100 miles for a combined cost of 1.2 cents a mile. The final cost is weighted between Supercharger and L2 charging costs but would not be more than 3.7 cents a mile and in practice is much less.

Provided you've got low-cost home charging it can still be a good deal, especially if you're only doing one SC. Every one past that adds up. I see Colorado's avg. price for gas is $2.09 today, so $2.09/53 (Prius Hwy) = 3.94 cents/mile so you're doing good. What was it raised to there before they dropped it again? BTW, if you're paying per minute, Tesla's SC site now says 26 cents/min. for Tier 2, 13 cents/min. for Tier 1.