From Newsgroup: uk.d-i-y

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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From Newsgroup: uk.d-i-y

Tricky Dicky wrote:

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?

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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From Newsgroup: uk.d-i-y

On Thu, 2 Jul 2026 13:09:28 -0000 (UTC), Tricky Dicky
<tricky.dicky@sky.com> wrote:

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?

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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From Newsgroup: uk.d-i-y

In article <1125nu8$2k0qb$1@dont-email.me>,
Tricky Dicky <tricky.dicky@sky.com> wrote:

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?

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

https://en.wikipedia.org/wiki/Power_over_Ethernet#Standard_implementation

-- Richard
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