Shutting Down

I'm ashamed to admit, for years of my career, I left my computer on every night and weekend.  I never thought that the energy savings of shutting down were too significant, but recently I've started questioning that.  

Photo by  Scott Webb  on  Unsplash

Photo by Scott Webb on Unsplash

Tips and Tricks HQ did a great breakdown of the energy consumption of a computer consistently left running on nights and weekends.  Summarizing, here:

  • Energy Usage for overnight, 5pm-9am, 16 hours (Given an eight hours work day) = 0.082 x 16 = 1.312 Kwh
  • Energy Usage over five working day overnights = 1.312 x 5 = 6.56 Kwh
  • Energy Usage over the weekend = 0.082 x 48 = 3.936 Kwh
  • One working week Energy Usage = 6.56 + 3.936 Kwh = 10.496 Kwh
  • Energy usage over one year = 10.497 x 52 = 545.792 Kwh
  • A 19 inch widescreen monitor running on screensaver consumes about .05 Kwh energy. Using the calculations used for the Desktop CPU the annual energy usage for the Monitor = 332.8 Kwh
  • Total annual energy usage for CPU + monitor = 878.59 Kwh

For reference, a 100 watt light bulb running for 1 hour will use .1 Kwh of energy.  Therefore, the energy saved by shutting down your computer every night and weekend could run a 100 watt light bulb for 8786 hours, or just over 1 year continuously.  Furthermore, shutting down could save you nearly $100 annually in energy bills.  

So maybe the few minutes it takes to save and shut down are worth it?