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Rivian now charging $.68 per kwh

Greg Chick

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The ever present misconception that an electric car is so efficient because gas contains 33.7kwh per gallon. The difference between pure fact and the reality of how energy extraction actually works.

20mpg at $4/gal = $0.20/mile
2mi/kwh at $0.68/kw = $0.34/mile

Do the math and that equates to $6.80/gallon, not $22.

Youre the Dude.
 

Conseil

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The ever present misconception that an electric car is so efficient because gas contains 33.7kwh per gallon. The difference between pure fact and the reality of how energy extraction actually works.

20mpg at $4/gal = $0.20/mile
2mi/kwh at $0.68/kw = $0.34/mile

Do the math and that equates to $6.80/gallon, not $22.
So what? It's 10 cents at my house.
So what? It's 10 cents at my house.
 

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NeedSumCoffee

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One gallon of gas is 33.7kwh. just multiply the two numbers.

In other math, $.68 / 2.4 miles per kwh is $.28 per mile which is my overall efficiency.

Our gx470 at 20mpg and $5 per gallon would be $.25 per mile. This means that the rivian in an overall energy sense, with their sustainable new charging infrastructure, is worse than 20mpg. Whatever claim of mpge is just inefficiency pushed somewhere else in their system.
Your math isn’t mathing.

2.5mi/kwh at $0.68 is equivalent to 11mpg at $3/gal or 20mpg at $5.44/gal.

For your ridiculous claim of $22/gal to be true (still assuming 2.5mi/kwhr and 20mpg), the electricity would have to be $2.75/kWhr
 

defcon888

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What I think people forget is if they are wanting to charge in the middle of San Francisco, L.A. New York etc. you will be paying more. It is "deman" pricing.

I live in California and for fuel it is around $4.60/gallon (Arco). In Nevada and Arizona......close to $3.00. It is the same reason that a 700 sq. ft. house in the Silicon Valley is $1,200,000 and in another state it would be in the $300,000 range. Supply and demand......is it wrong?.....yes, is it fair, yes!
 

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Stainer85

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The RAN that I charged at two days ago in Newburgh, NY, was $0.40/kWh.
 

Sheeptruck

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That's $22 per gallon of gas equivalent now. No way this makes sense any more. Good luck EVs.

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You are assuming that we all only charge our vehicles at charging stations. I charge my overnight at home except when taking road trips.
 

StephenSC

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I have always used a simple rule of 10. My BMW i3 gets 3.2 to 3.7 MPKH. I would expect the gas equivalent to get 32 to 37 MPG. My Riv gets 2.0 to 2.5 MPKH. My Pilot got 20-25 MPG which is a fair comparison. So I just multiply everything be 10. In Quartsite I just paid 59 cents at the RAN. The gas station there is $4.02. That is 69% higher than the gas equivalent. As an early adopter (2012) and driver of 6 EV’s, it make me mad and sad to get ripped off by Rivian. Note Phoenix residents pay as little as 8 cents per KWH in their homes.
 

TexasBob

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I was wondering whether setting up a charger and allowing the public to use it could be profitable. I didn’t get much farther than this article.

https://www.mckinsey.com/features/m...g-stations-be-profitable-in-the-united-states
Call me cynical but... it is McKinsey so it is (a) an answer intended to please a specific client agenda, (b) assumes the status quo goes on forever and gets worse, and (c) the math is usually wrong.

In this case you need look no further than the preposterous assumptions: "Costs assume wholesale electricity at $0.20/kWh with a $20/kW demand charge." Average wholesale electricity rates in US are less than half this (8 cents where i live) and the demand charge runs between zero and 1/2 this. But these numbers are used because they serve the PG&E agenda.

Then there is the ridiculous "$95,000 per charger for the charging hardware and installation excluding grid and site equipment." The SC cost is less than 1/2 this according to public bid documents (as is obvious for anyone looking at a charger). But this number serves the agenda of big charging manufacturers like ABB that were trying to shake money from the Fed.

Oh, and it uses a high SG&A and a 15% discount rate to pad the budgets of Chargepoint, et. al.

Even with all those bad assumptions, they still concludes "price of -$0.45/kWh" gets you to a small profit on an IRA funded station.
 

Glembi2

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Call me cynical but... it is McKinsey so it is (a) an answer intended to please a specific client agenda, (b) assumes the status quo goes on forever and gets worse, and (c) the math is usually wrong.

In this case you need look no further than the preposterous assumptions: "Costs assume wholesale electricity at $0.20/kWh with a $20/kW demand charge." Average wholesale electricity rates in US are less than half this (8 cents where i live) and the demand charge runs between zero and 1/2 this. But these numbers are used because they serve the PG&E agenda.

Then there is the ridiculous "$95,000 per charger for the charging hardware and installation excluding grid and site equipment." The SC cost is less than 1/2 this according to public bid documents (as is obvious for anyone looking at a charger). But this number serves the agenda of big charging manufacturers like ABB that were trying to shake money from the Fed.

Oh, and it uses a high SG&A and a 15% discount rate to pad the budgets of Chargepoint, et. al.

Even with all those bad assumptions, they still concludes "price of -$0.45/kWh" gets you to a small profit on an IRA funded station.
Great points. I missed that the article had an inherent bias.
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