News for hackers. Stuff that matters.

A comment on PoE basics and beyond: What every engineer should know. Parent comment

Re:PoE basics and beyond: What every engineer should know by jansper39 on Wednesday October 22, 2025 @04:53AM (#45666423)
You have to convert the power to 48v and back down to whatever you need on the other end which has losses, plus you have losses over the cable too.
[ Parent | on HN ]
Re:PoE basics and beyond: What every engineer should know by rubatuga on Wednesday October 22, 2025 @10:13AM (#45669483)
Well quite frankly 48V has lower losses than 12V
[ Parent | on HN ]
Re:PoE basics and beyond: What every engineer should know by shadowpho on Wednesday October 22, 2025 @12:13PM (#45671353)
110v -> 48v (long thin cable) -> 12v

Versus

110v (long thick cable) -> 12v

Top has more conversions and more current running on smaller gauge

[ Parent | on HN ]