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Wireless vs wired DC fast charging efficiency test

Bjørn Nyland · 66.9K views · 2022-03-18 · 25:40

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Overview

Bjorn Nyland compares wireless and wired DC fast charging for an electric car, measuring end-to-end efficiency. The test shows the wireless system holding up well against a plug.

On Hacker News

HN cites it as the evidence that inductive EV charging can match wired charging in efficiency.

Recommended by 1 HN people across 1 months · HN mentions 2022–2025

Topics

Cars, EVs & motorcyclesRenewables, batteries & storage
Search by tags
electric vehiclesinductive chargingcharging efficiencyfast charging

What people said

audunw · 2024-08 · Recommendation

Wireless charging can be surprisingly efficient. You should check out this video where wireless charging beats wired charging in end to end efficiency: [VIDEO] In that case it’s probably more due to a particularly inefficient DC fast charger. (It’s been a long time since I watched it so I might not remember the details right.) In the end it doesn’t have to be exactly as efficient as wired charging, and probably never will be for a good implementation of a wired charger. It only has to be so close that you don’t care about the difference. I don’t think the inverse square law is very relevant on these scales. Electromagnetic radiation can be focused.

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breve · 2025-09 · Reference

> There's zero chance this will make it into a production vehicle Wireless charging is in production. Here's one example: [LINK] Wireless charging can be as efficient as wired charging: [VIDEO] [LINK]

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clouddrover · 2023-11 · Reference

> If there only was a system that could automatically disconnect Or just use wireless charging, then there are no cables. Wireless charging for EVs can be efficient: [VIDEO] And wired charging is not as efficient as you might think: [LINK]

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Sources

Video by Bjørn Nyland, played through YouTube.

Data and selection notes

HN summaries and labels may contain AI errors. HN dates refer to discussions, not video publication.

HN Library: HackerTube export (2026-10-31) and open-index/hacker-news. Upstream summaries and classifications may contain AI errors.

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