Computer energy consumption
We have more computers than we have ever had before and we use them for much of the day. So it is a good idea to consider your computer's energy consumption.
If you're going to purchase a new computer, choose one that is energy-efficient. If you already have a computer, there are several ways of reducing its energy consumption.
Computers have different so-called energy-saving modes which you can use to set the operating system. Just because these screen saver comes on, does not mean that the computer automatically uses less electricity. The energy-saving modes may be referred to as "hibernate" or "standby". Select "hibernate" because it uses less electricity. You can set how quickly and to which mode the computer should use. There are also settings whereby the computer switches off both the hard drive and the screen completely when you have not used the computer for a while.
Extension cable for the computer’s peripheral equipment
You can use an extension cable which switches off all of the peripheral equipment to the computer when it is not being used. The objective is to save electricity which is otherwise used by screens, printers etc. when the computer is hibernating. It works as follows, the extension cable via a cable connected to the USB port, senses when the computer switches to standby or is switched off. This then switches off the electricity to the peripheral equipment. The computer is however connected to a socket outside of the extension cable, where the electricity supply is not broken.
A computer has an expected life of 5-6 years on average. If the electricity costs approximately SEK 1 per kilowatt hour, you can save up to SEK 1850 per year by choosing the most energy-efficient computer and printer.
LCD screens (Liquid Crystal Display) use on average 50-70% less energy when active compared to ordinary screens.
Energy-rated home electronics
For computers and other home/office electronics, there are various voluntary energy-ratings.
"Energy Star" was initially an American rating and is now also being used in Europe. With the help of an energy calculator which can be found on Energy Star’s website, you can for example calculate how much energy a certain computer requires.
The Swan and TCO rating
The Nordic ecolable The Swan (Svanen) is available for computers and screens. In addition, there is also the TCO rating for computers, screens and printers which as well as taking into consideration requirements for low radiation and energy consumption covers other working environment and environmental aspects.