That post is without merit

Aug 14, 2022
8:20:04am

Zoobieman All-American

#1. Drag not weight is the most important. Plus EVs use regenerative braking so even with more weight they are more efficient

#2 AC is powered by the alternator and is less efficient than battery power

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Zoobieman

Bio page: Zoobieman
Joined: Apr 23, 2012
Last login: May 4, 2024
Total posts: 10,516 (29 FO)

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Messages

Author

Time

Re: EV efficiency - This shouldn't be much of a surprise at all but I thought the graphics were interesting

supertux Nice.

8/14/22 8:10am

I will say that it doesn't really consider a couple of things

supertux

8/14/22 8:13am

That post is without merit

Zoobieman

8/14/22 8:20am

AC is not powered by the alternator. That's not how AC works.

Dryfire

8/14/22 8:42am

Yeah that's what I was getting at. Belt driven compressor has to be more efficient than electric. But I'll admit

supertux

8/14/22 8:46am

Umm, weight is a HUGE factor.

byu1

8/14/22 9:36am

Not as big a factor when you are regenerating 65 % braking energy

Zoobieman

8/14/22 4:29pm

Thats like comparing the energy value of a one pound peas on the table vs

ABCoug

8/14/22 8:21am

They are way more efficient throughout lifecycle - all up including the cost

delux_247

8/14/22 8:44am

Going to buy a electric truck and put a hydroplant in the bed I'll be killing it

ABCoug

8/14/22 8:50am

huh... that's like saying that if Mr. Fusion" reactors were more efficient, we'd

Rodolpho

8/14/22 9:03am

Of course which is why we do what we do, also why subsidies are throwing money

ABCoug

8/14/22 9:24am

Those numbers look way off.

kccougar

8/14/22 8:28am

Please research and correct then

Zoobieman

8/14/22 8:31am

It doesn't take research to see the problems

kccougar

8/14/22 8:36am

It also varies greatly on the kid of driving you're doing. Stop and go under 45mph, maybe close to 20%. Highway driving

supertux

8/14/22 8:44am

please share the simple math that proves this

Rodolpho

8/14/22 8:50am

You're kidding right. . . Compare hybrids vs non hybrids at it is about 22%

Zoobieman

8/14/22 9:00am

Ok. Tell us about regenerative losses. Hint: they average 44%.

kccougar

8/14/22 9:10am

Fails to account for EV raw materials

kapcreations

8/14/22 8:30am

Link with answers

Zoobieman

8/14/22 8:36am

If energy efficiency was driven by pure science, not politics, we'd have Thorium reactors producing our energy

Division Bell

8/14/22 8:37am

Again with electricty (i.e. EV) the power source has already been generated

ABCoug

8/14/22 9:01am

The issue at hand with EVs is not the efficiency of the drivetrain

Daedalus

8/14/22 8:47am

No doubt but I'm and engineer and the energy efficiency is what struck me. It's like comparing a heat pump to a heat

supertux

8/14/22 8:53am

Look at diesel locomotives for a real life case study for the advantages of

ABCoug

8/14/22 9:02am

I think a better metric would be $/mile. Energy density/vehicle mass,

delux_247

8/14/22 9:04am

Solid point. Batteries are heavy, slow charging, less energy dense, and expensi

Zoobieman

8/14/22 9:18am

However, batteries can charge overnight at your house, so unless you're on a road trip, the time is takes to charge is

SingleStrapBackpack

8/14/22 1:20pm

That’s why the Lightning is terrible at towing

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