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I think it’s how much went into the batteries. Ancillary power is not tracked, converter losses, heat etc

I have a new 48A level 2 charger and my car limits it to 32A. PCS_a019 grid quality error code. The connections are fine, the voltage is high typically 240-248V so it’s not a voltage drop issue. The car negotiates and decides. Wonder what those negotiations are.

My 2018 Model 3 negotiates with the charger for a minute or so then sets the charge rate it is comfortable with. Not the 48A my new charger can supply, but only 32A. Sends an error message saying something about the quality of the connection. 32/48 Amp. I wonder what that negotiation is all...

That’s pretty typical supercharger cost, but I was talking about CO2 production/mile relative to how much gasoline produces per mile.

I live in the Ohio river valley and on our coal fired grid I'm getting about 22 mpg gasoline equivalent with my wall-to-wheels usage. I did better than that in my old gasoline car. A big part of the reason I bought this car is because I thought I was doing good. I'm kinda ashamed. What, am I...

Exactly! Wall-to-wheels. Thank you for that simple way of saying what I mean. I think that main "Wall" number should be published, right below your odometer. Seems like a reasonable requirement. And, you can pay your friend right when you charge at their house. Gasoline pumps log to .001...

Where are you getting data?

How?

How are you getting the BMS data?

Yep, the odometer only reports 'drive' kWh all the other stuff doesn't count toward that number. I use about 420 Watt hours / mile, long term average.

I have an OBD CAN bus reader and use the "Scan My Tesla" app to read that CAN data. In that data Tesla reports AC charge kWh, DC charge kWh, Regen charge kWh and also Drive kWh. I also have a kWh meter between my outlet and charger. The energy issues are manifold: 1 is charge efficiency, that...

The odometer reading in your Tesla reports 'Drive kWh' none of the other stuff is counted like radio, lights, heater, AC etc.

I have a kWh meter in between my charger and wall outlet and have been taking data for a couple years. It's variable. I think there's a lot of stuff going on in the car that uses power that isn't logged visibly to typical consumers. there's significant rounding error as a kWh is pretty large...

What? the difference between what goes into your car and what the car reports having gone into it is not clear, certainly it's not the same, that difference is hard to measure.

Yeah, that's true. There should be an honest accounting of the energy into the car. Reported like the miles are. Kilo Watt hours into the car, then if you charge at your friend's house you can honestly pay him the difference, instead of doing stated charge change * efficiency and who know what.

208 3Ø power, but only 2 legs used. sigh.

And then there's the difference between what your car tells you your usage is versus what it actually uses. I ran a 2013 S from february to august and averaged 667 kWh/mile over 2,000 miles. Input kWh.

Why is this even an issue? How come can't we just read off how much energy went into the car? Why are we all trying to calculate what our fancy cars tell us versus what we suspect may be the truth? Gasoline is sold by the .001 gallons and there's a stamp at the pump saying that some agency is...

Yep. "Drive miles" is what the Scan My Tesla app reading the CAN bus will tell you. The other kWh don't count, you know, lights, radio, wipers, heat etc.

So what happened? I wonder if Tesla will repair them, mine, about 3 years old is also looking pretty bad

And what are your input kWh over that same period? I’m gonna guess they’re like 1.5x

So how many Wh / mile are you using?

Where are you getting your data from?

To believe you know how much energy your car uses is generous.

if a 120V source is less efficient it's likely because the car is awake the entire time it charges. Since it takes much longer, the staying awake part is consuming more energy.

The comparison is not between electrics, it's between electrics and ICE cars, with an ICE car you put energy in the tank and everything you use that car for comes out of the tank. With my Tesla, I put energy in through the charge port, but only the kWh that goes through your motor is counted...

I run Michelin CrossClimates on my LR-DM-M3 and they seem fine. Not as noisy as you'd suspect from their deep grooves.

How are you seeing energy usage of AC or Sentry or Dog mode?

Tesla does a great job with energy usage, and they know where every Watt goes, and I would like to know where they went. I suspect you'd be surprised to know your actual kWh in / mile driven, during times when nothing else was activated.

I have a car to go places and I put energy into the car. The relevant metric is how much energy I put into the car versus how far it takes me, right?

Tesla cars use much more energy than they self report. The kWh in the odometer are "drive" kWh only, and no HVAC, charge inefficiency or battery conditioning is reported there. I am doing an ongoing study about this using a separate kWh meter for my car charger and am logging this. I've...