Chevrolet exits all ICE production by 2035
Chevy exits ICE engines Hopefully the other manufacturers won't follow suit. Being from Texas and starting to thaw out from our latest freeze of the century, I don't see how our current power g...
Forum Discussion
Groover wrote:Groover wrote:RoyJ wrote:time2roll wrote:RoyJ wrote:I understand the 600 mile Semi that runs at 80,000 pounds will not have 1000kWh.
In 10/20/30 yrs, when they make duallies with 1000 kWh packs and 10 min charging, we go 100% electric. Simple as that!
They should have 2000 kWh to do it comfortably.
600 miles is 10 hrs straight at AVERAGE of 60 mph. With 1000 kWh that's 100 kW a average, or 134hp. It takes a LOT more than 134 hp to move 80,000 lbs at an average of 60 mph (including hills).
Even with a 2000 kWh battery that's only 270 hp. Barely enough to maintain 60 mph on perfectly flat ground.
My motorhome with a similar frontal area to a semi gets about 11mpg at 70mph. The best that I can figure that is only about 140hp at 70mph or about 110hp at 60mph. The Tesla semi is probably has better aerodynamics than my motorhome. Barely enough power to maintain speed on level ground is more battery power than is needed. Yes, more power will be used to climb hills or accelerate but that energy will be recovered when going back down the hill or slowing down and I have never seen any vehicle run at max speed for 8 hours. This would indicate that a 1000kwh battery is pretty close to the mark.
The Tesla semi will have far more power available for hill climbing and acceleration than diesel power rigs. Tests show that it can go from 0-60mph in 20 seconds with a full load. I have never seen a diesel rig do it that quickly. That should help traffic flow better and make traveling more pleasant for all of us.
In city use, 1000 kWh might get you 600 miles, as there're a lot less aero loss, and a lot more regenerative braking.
However, the context here is freeway / linehaul, as most of us RV'ers rarely travel hundreds of miles in-town. (my original comment on EV duallies)
Weight does matter in the equation, both for rolling friction, and also because roads are rarely flat. I'm guessing your motorhome weighs a lot less than 80k. I won't assume the Tesla is better aero wise, as in real life commercial application you have a lot more varied trailers. You can't refuse a load on the flatbed just because it's not aerodynamic!
I've never doubted the power of the Tesla semi, just the highway range numbers don't add up unless the pack is huge. Remember, we're talking replacing a diesel tractors with up to 300 gallons on board, that's a lot of chemical energy compared to the typical sedan with 15 gallons of gasoline.
