This article gives you some important info about the amount of energy game consoles consume.
The NRDC measured the amount of power the Sony Playstation, Microsoft Xbox 360 and Nintendo's Wii use when they are active, idle and turned off and found that these systems use nearly the same amount of power when someone is playing them as they do when they are unattended..... Video game consoles that are left on all the time might be consuming roughly three times as much electricity as the flat screen televisions they are connected to.
Two things you can do?
1. Find that POWER SAVE button on your console.
2. When you are done playing, turn off the console.
Want to level up?
If your console is plugged into a power strip, turn it off when you are done playing, leave the house, or go to bed. Doing so eliminates PHANTOM LOAD.