Electricity bill for network gears

In general, a kilowatt hour is a unit of energy and it is the common way that electricity is measured.

A kilowatt (kW) = 1,000 Watts(W). 

Average U.S. Residential Cost of a kilowatt hour is $0.098.

 

If you have a decent size of home network lab, below result of electricity cost would be interesting.

 

Ex)

 Cisco 3750G-24TS used 169W under 100% throughput power comsumption.
 (Cisco 3750G-24TS used 134W under 5% throughput power comsumption)

Calculate a year of electricity cost for the Cisco 3750G-24TS is 
(with 100% + average U.S. Residential Cost of a kilowatt hour: $0.098.

169W x 24 hours = 4056 W = 4.056kWh per day.  So, 4.056 x 365(days) = 1480.44kW.

1480.44(kWh) x $0.098 = $145.08.

 

— List of Network Gears —

 

HP Procurve1810g-8 : Max 15W
SSD (Solid State Drive) : Averages 2 – 3W
HDD (Hard Disk Drive) : Averages 6 – 7W
Google ChromeCast : Max 5W – idle 1W