this post was submitted on 16 Jun 2025
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The "standard" car charger is usually overkill—but your electrician might not know that [32:26] (www.youtube.com)
submitted 2 days ago by FenrirIII@lemmy.world to c/technology@lemmy.world
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[–] DrunkenPirate@feddit.org 7 points 1 day ago* (last edited 21 hours ago) (12 children)

In recent test of a German auto club they found out that it‘s cheaper/ more effective to charger faster. You loose a lot of energy if you load slow over hours.

This energy is taken by the electricity of the car. So, while charging the car is on and takes some Watts. There are just a few brands that have decoupled the charger circuit from the overall electric circuit of the car.

Can’t find the article now, but I think charging a PHEV through a standard power plug had about 20% energy lost. It was clearly visible that a charger is a good choice.

Edit: link https://www-adac-de.translate.goog/rund-ums-fahrzeug/elektromobilitaet/laden/ladeverluste-elektroauto-studie/?_x_tr_sl=de&_x_tr_tl=en&_x_tr_hl=de&_x_tr_pto=wapp

You‘ll loose

  • ~10-30% AC 2.3kw Standard Power Plug
  • ~ 5-10% DC 11kw Wallbox
  • Internal car electronics are crucial: Is the loading circuit de-coupled or the entire car On?
  • Temperature or pre-heating the battery before loading reduces losses at DC charging
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