this post was submitted on 20 Sep 2026
91 points (96.9% liked)
Electric Vehicles
3121 readers
453 users here now
Overview:
Electric Vehicles are a key part of our tomorrow and how we get there. If we can get all the fossil fuel vehicles off our roads, out of our seas and out of our skies, we'll have a much better environment. This community is where we discuss the various different vehicles and news stories regarding electric transportation.
Related communities:
- !automotive@discuss.tchncs.de
- !avs@futurology.today
- !byd@lemmy.world
- !ebike@lemm.ee
- !energy@slrpnk.net
- !geely@lemmy.world
- !micromobility@lemmy.world
- !polestar@lemmy.ca
- !rivian@lemmy.zip
- !teslamotors@lemmy.zip
- !xiaomi@lemdro.id
founded 2 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
The article mentions "about 90%" of efficiency (i understand it as additional losses when compared to wired charging).
I'd say that's quite bad, and can not be easily disregarded.
As if Porsche buyers ever cared about efficiency.
Das douchevagon
( ͡° ͜ʖ ͡°)
That's not in the cable, that's the "end to end" charging system, and yes, that is comparable to wired charging. Efficiency in the wireless transmission is 96-99%, depending on distance and alignment. This has been studied extensively. Like I said, this is not new technology. Have a web search.
Here's a couple articles to get you started:
https://electreon.com/blog/debunking-wireless-ev-charging-myths/https://www.energysage.com/ev-charging/wireless-ev-charging/
https://www.witricity.com/blogs/comparing-efficiency.php
https://www.osti.gov/servlets/purl/1876291
https://www.ornl.gov/news/ornl-demonstrates-120-kilowatt-wireless-charging-vehicles#%3A%7E%3Atext=97+percent+efficiency%2C+which+is+comparable+to+conventional%2C+wired+high-power+fast+chargers
https://www.mckinsey.com/industries/automotive-and-assembly/our-insights/perspectives-on-wireless-and-automated-charging-for-electric-vehicles#%3A%7E%3Atext=A+wireless+inductive+charging+system+is+at+least+one+or+two+percentage+points+more+efficient+than+a+DC+%5Bdirect+current%5D+fast+charger+at+the+same+power+level.
Mate, focus (and would you please avoid shoving advice and links when not openly asked?!): 90 percent efficiency claim is directly in the OP.
The number can even be confirmed at the press release by Porsche (which boldly claims charging efficiency to be "over 90 percent").
Focus and keep the number in your mind (the number found BOTH in the OP and confirmed at the Porsce's press release) while trying to explain where the losses do take place.
I totally understand, that losses do happen when the electricity is converted first to DC and then back to high freq.AC and during the inductive charging itself.
This is expected and is a convenience tax of sorts (getting rid of cables and plugs) and yet, it's less efficient than plugging directly. Once again, only 90℅ efficient.
I don't have the crayons to explain it to you any simpler 8)
Mate, focus. I did not dispute this number. I address it directly, in the comment you replied to. Come back when you have facts instead of just personal insults.
goes ahead and disputes the number
It’s both? Like 90% and 96-99% efficient? Ah yes
Learn to read. Or don't, I even included a pretty picture for you.
If you fail to understand what's been discussed and compared to (i.e., wireless vs wired charging)
and yet keep your arrogant stance towards others (~~in the now deleted comment literally you~~_were yelling at someone to ~~shut their mouth~~ look this stuff up before starting to write about it
or another arrogant "have a web search" thrown randomly at me),
then why would you act surprised at insults as a response to your regular toxic behaviour?!
Okay so now you've graduated from personal insults to just making shit up so you're being blocked now, goodbye.
That is very Trump of you, shouting "fake news!" whenever been caught red-handed and shutting/blocking.
Ok, bye.
Well, Sherlock, good catch! That's an affing wireless charging system. /S
The 90 % efficiency claimed in the OP - is the claimed TOTAL efficiency of the PRODUCT by Porsche (wireless charging station). Of course "it's not in the cable" (rofl), it's in ALL the electric components of the system - which is OVERALL less efficient than a similar (as in function and provided power) charging station.
Similar, but noticably POORER in efficiency (~ it has 10% more losses than a similar wired charging solution). As even the Porsche marketing claims.
If you still fail to get it - then you might want to follow your own unsolicited advice:
I can rewrite the whole press release by Porsche for you, but i can not understand it for you.