Power Over Ethernet

Jul 02, 2026 Last reply: 2 weeks ago 3 Replies
T

We are about to move and one of the first things to get installed at the new bungalow will be a CCTV system, namely a Eufy S4. The NVR powers the individual cameras using POE, I am also looking at installing a MESH system with a POE back haul. I presume I can use the built in injector in the NVR to provide POE to the other devices. I suppose there is a limit to the amount of current that can be drawn and should the limit be hit is it just simply add either a POE enabled switch or dedicated injector to the network or will multiple power inputs cause issues?



Richard



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A

Not familiar with Eufy, so the answer is "it depends" ...

The NVR will have a per-port power limit and an overall limit, does each mesh node require more power than a camera?

Would the NVR pass all "other" traffic to the rest of your LAN, so the mesh nodes are visible to each other or the mesh master node, likely yes, but if you're unlucky you might find the NVR does some form of firewalling/segregation/VLANs between cameras and rest of LAN.

Yes, you could use a PoE switch, or PoE injectors if necessary.

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P

The NVR specs will tell you what power load is supported but if it's designed to run, say, four cameras then that's what it'll do. if you swap one of the cameras for a wifi access point then success will depend both on the load the NVR is capable of delivering and on how much power the access point requires.

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R

There are multiple PoE standards, and a given injector or switch will have its own power limit. This might help, or not:

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-- Richard

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