Networking switch ‘typical’ power consumption.

Defy Belief · Monday at 07:25

I’ve got a pretty old HP 1910-8G-PoE+ (180W) switch running 2 x UniFi u7 pro access points in my house.

It’s always been pretty loud but it’s in my garage so I’ve never cared about that, but it’s recently made me think about power consumption..

Took a look at the data sheet, and it’s showing the below:

Power consumption (typical) 228 W

Power over Ethernet (PoE) * ✔

Total Power over Ethernet (PoE)

budget 180 W

Now

when you’re looking at ‘typical’ is that idle with no ports being used?

It’s an old switch so it wouldn’t surprise me but 228 seems excessive for an 8 port switch with no ports active.

Rroff · Monday at 07:28

Unless using PoE the idle power consumption is probably around 10-12 watt.

jaybee · Monday at 07:35

Buy a cheap killowatt or smart plug with power consumption monitoring and find out. Chatgpt reckons 25-40 watt real world idle. That's about £50-£90 a year running 24/7 @ 25ppkwh.

Caged · Monday at 11:10

It won't be drawing anywhere close to that, but grab a cheap smart plug with power monitoring if you want to know for sure

Zefan · Monday at 11:33

The 228w will be when providing the 180w poe. About right given it needs to transform 240v to poe voltage. If it isn't feeding poe devices it's very unlikely to be using more than 15 30w unless insanely active with non poe devices.

jackboy · Monday at 22:01

I have a smart plug on all my network gear, which is a VM Modem, a Unifi Ultra Gateway, an Aruba 24 Port POE switch, with 3 AP’s connected and a Unifi UNVR instant…….that draws around 95w. Oh there is also an UPS connected.

My guess is the switch is approx 35w

Caged · Monday at 23:30

Oh yeah I have access to a UPS with monitoring. 440W is powering a Fortinet firewall, 3x 48 port Aruba PoE switches with about 3 wireless APs and 15 IP phones, a Lenovo mini PC, a fibre ONT, and two CCTV NVRs with a couple of hard drives in each, and PoE cameras attached.