[NavinF]

meh, only if you run it 24/7 and only if you live in Europe with very high energy prices. If the machine sleeps for 16 hours a day while the user goes to sleep or goes outside, you'll never break even. There's also no guarantee that next year will be as shitty as the last one regarding electricity.

[jbverschoor]

If you're actually using it 8 hours a day then it's 30 watts for the mba, and 150 for the pc + 30 for the display. So the difference is 1.2kwh per day. For 200 days of work in europe, that's 2001.2.4 = 96 per year.

In the US that's 235 working days per year at around $0.20 (13 - 25ct), so about $50 per year.