IdaD wrote:
9.7 does seem a little low to me for that setup even going 70. Not crazy low but I'd have guessed more like 11 at those speeds. It could have been a windy day, though.
The interesting thing I've learned watching some of these videos recently is how efficient these EVs are in terms of energy use. Assuming this video is accurate, the Cummins carries 5 times the energy but can only tow roughly twice as far. I suppose even less impressive is that the Hummer needs a 3000 lb battery to carry a fifth the energy vs 31 gallons of diesel.
I went through Texas one time and I got like 9 miles/gallon when I normally got 12. I was driving into a straight headwind. I would guess it was about 20 MPH? So yes, it can make a big difference.
About the motor efficiency. Electric motors are around 80% efficient. Modern diesels are roughly 40% efficient.
A gallon of #2 has about 38kwh of energy in it. So if you have a battery with 131kwh, (a Lightning battery) you have a diesel fuel tank of about 3.5 gallons of diesel. That being said, if you remember, an electric motor is 2x as efficient as an ICDE. So you now have a fuel tank of about 7 gallons of diesel in your electric truck.
A 131kwh battery (the Lightning size) can tow about 7 gallons worth of diesel. My diesel would get about 12 MPG towing that trailer. So my diesel would tow that trailer about 84 miles before I ran out of fuel.
These little electric trucks get around 3/4 of a mile/kwh towing a small trailer.
Well would you look at that!! The lightning towed that trailer 87 miles before it ran out of juice!!!
Math works!!!
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