[2 days left] What’s wrong with your cloud strategy? Learn why multicloud solutions matter with Nimble Storage.Register Now

x
Solved

# Server energy comsumption calculations

Posted on 2009-07-16
Medium Priority
274 Views
if i use this online calc with the wattage below from a meter i have on the server
http://www.eu-energystar.org/en/en_008b.shtml

with the same wattage and always on i get ¬1150.5 per year but the below calcs give me ¬258.84 per year

can someone please sanity check this cheers

HP ML 350 G5

volts x amps= watts

235v x 0.85amp = 199.75

24 Hours Per Day X 30 Days per Month (average) = 720 hours per month
199.75 Watts Per Hour X 720 hours per month = 143,820 Watts per month
143,820 Watts per month / 1000 Watts per Kilowatt hour = 143.82 kW Hours
143.82 kWh X  .15 cents per kWh = ¬21.57 per month
¬258.84 per year
¬21.57 / 720 hours = .0299 euros per hour/ 2.99 cents per hour
0
Question by:nostrasystems
[X]
###### Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

• Help others & share knowledge
• Earn cash & points
• 3
• 2

LVL 69

Expert Comment

ID: 24871671
That calculator is assuming there are 240 days in a year - I guess it only counts business days and assumes equipment is turned off on weekends and holidays. If it assumed 365 days a year, total kW would be 1749.8, not 1150.5.

Also, your 258.84 figure is an annual dollar cost, not a total kW use in a year.
0

Author Comment

ID: 24873226
but does it cost 250 or 1000 to run an entry level server per year always on?
0

LVL 69

Expert Comment

ID: 24875229
For 365 days/year, that's 1749.8 * \$0.15 cost per kW = \$262.47 - I don't know why the calculator is using a \$1.00/kWhr rate.
0

Author Comment

ID: 24876442
how can u see it using 1 dollar an hour? its default is 0.11 euro cents?

so a milloin percent if the watt draw is 128watt on my meter its roughly 250 euro for 365 x 24 x 7

0

LVL 69

Accepted Solution

Callandor earned 2000 total points
ID: 24878140
The total power usage it calculates is 1150.5 kW-hr/year for a small server (assuming 240 days/year) and the total cost it comes up with is 759.3 euros.  I can't see how 0.11 euros/kW-hr can get you to this total, because I calculate it as 0.66 euros/kW-hr (the \$1/kW-hr was a mistake because I didn't have it set to server).

For 128 watts, the cost is even less, because I was using 199.75 watts, so it's 128 x 365 x 24 = 1121.28 kW-hr/year, and at \$0.15 per kW = \$168.192.
0

## Featured Post

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Monitor input from a computer is usually nothing special.  In this instance it prevented anyone from using the computer.  This was a preconfiguration that didn't work.
Arrow Electronics was searching for a KVM  (Keyboard/Video/Mouse) switch that could display on one single monitor the current status of all units being tested on the rack.
In response to a need for security and privacy, and to continue fostering an environment members can turn to for support, solutions, and education, Experts Exchange has created anonymous question capabilities. This new feature is available to our Pr…