this post was submitted on 21 Aug 2025
170 points (88.3% liked)

Technology

74519 readers
3799 users here now

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


Our Rules


  1. Follow the lemmy.world rules.
  2. Only tech related news or articles.
  3. Be excellent to each other!
  4. Mod approved content bots can post up to 10 articles per day.
  5. Threads asking for personal tech support may be deleted.
  6. Politics threads may be removed.
  7. No memes allowed as posts, OK to post as comments.
  8. Only approved bots from the list below, this includes using AI responses and summaries. To ask if your bot can be added please contact a mod.
  9. Check for duplicates before posting, duplicates may be removed
  10. Accounts 7 days and younger will have their posts automatically removed.

Approved Bots


founded 2 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
[–] spongebue@lemmy.world 8 points 5 days ago (1 children)

I think that number is a bit off. Yes, there is overhead when charging a car to run its battery management system, heat losses in the wiring, etc. But it's not 20-30% of the ~kilowatt of power you'd run through level 1. A quick search says that 20% loss is at the higher end for level 1 (probably 15% on the lower end) but even level 2 has about a 10% loss.

The bigger issue is that level 1 just doesn't have nearly as much power as level 2. Most cars charge at level 1 at 8-16 amps. Most level 2 setups charge at a few times that, plus the voltage is doubled so the total power ends up being about 10x as much. But that's not to say everyone needs that power either. Honestly, for the average driver it's quite easy to make level 1 work.