Technology

59710 readers

5673 users here now

This is a most excellent place for technology news and articles.

Our Rules

Follow the lemmy.world rules.
Only tech related content.
Be excellent to each another!
Mod approved content bots can post up to 10 articles per day.
Threads asking for personal tech support may be deleted.
Politics threads may be removed.
No memes allowed as posts, OK to post as comments.
Only approved bots from the list below, to ask if your bot can be added please contact us.
Check for duplicates before posting, duplicates may be removed

Approved Bots

founded 1 year ago

MODERATORS

390

Fear Mongering About Range Anxiety Has To Stop — CT Governor Calls Out EV Opponents (cleantechnica.com)

submitted 11 months ago by L4s to c/technology

223 comments fedilink hide all child comments

Fear Mongering About Range Anxiety Has To Stop — CT Governor Calls Out EV Opponents::Several state governors are fighting fear mongering as they attempt to reduce transportation emissions in their states.

you are viewing a single comment's thread
view the rest of the comments

[–] partial_accumen 0 points 11 months ago (1 children)

Serious Question: Why can’t we just have towable generators so EVs can go from an electric car to a Plugin Hybrid for road trips?

Lets work through some back-of-the-napkin math here.

Lets say the average speed you're looking to take on your road trip is 50MPH. For that discharge rate you'd need to be able to charge at 50MPH to keep up. That would put you at a charging requirement of 50kw.

Here is a picture of a 50kw towable generator:

This isn't even any of the additional gear needed for DC rectification and power management needed to interface with NACS or CCS.

and seems like a very easy solution to range anxiety.

You can see why this idea doesn't really work then.

[–] Buddahriffic 3 points 11 months ago (2 children)

I'm going to need to see your work for the 50mph to 50kw conversion.

[–] [email protected] 3 points 11 months ago (1 children)

1 Kw per mph sounds pretty bad. I would've thought electric cars are more efficient than that.

[–] Buddahriffic 2 points 11 months ago

Also one is a force while the other is a speed. You'd need a lot of assumptions to go from one number to another single number.

[–] [email protected] 2 points 11 months ago (1 children)

Googling a rough average returned 0.346 kwh/mile for electric cars between 2000 and 2022 (wide range, im aware). Traveling at 50MPH, you go 50 miles in 1 hour (assume you're already going 50, and stay at that speed). So you'd use [0.346KWh/mile] *[50 miles/hour] = [17.3 KW] per hour @ 50 MPH

[–] Buddahriffic 2 points 11 months ago

One of the problems is that air resistance increases at a squared rate vs velocity, so that average is only really accurate at one specific speed (which tbf might actually be 50mph). But this is a lot more accurate than just replacing "mph" with "kw" lol.

My biggest red flag was the picture of a commercial-grade-looking generator when plug in hybrids can fit the generator plus electric motor, battery, AC, and all the other stuff needed under the hood.