We measured the ProCurve 2510-24’s power usage:
This was measured on a 240V power circuit with a handful of devices attached (5). The peak wattage was measured during power-on and idle was steady around 11.9W. We would expect power usage to increase as you add more bandwidth-heavy devices; however, now that many of these switches are falling into the hands of home enthusiasts for connecting things like low-bandwidth computers, printers, Raspberry Pis and the like it should stay quite a low figure even with more devices connected.
So, how much does it cost to run? Assuming the minimum power draw is 12W and that electricity costs ~$0.30/KWhr:
Weekly: 2.016KWhr; $0.60
Monthly: 8.064KWhr; $2.42
Annually: 104.832KWhr; $31.45
All up it’s not a particularly expensive device to keep running. If you don’t need gigabit speeds this switch can be an excellent choice for getting a large number of devices onto the same network – 100Mbit is more than enough for browsing, light file sharing and streaming, printing, 100Mbit devices like Raspberry Pis and more.