To explain it very simply (but not necessarily a 100% accurately) it works like this: Power stations need to operate 24/7 at a minimum level, let’s say 60% efficiency. However, the demand at night time is say only 40%. This means, that a whole 20% of energy is wasted during the night – energy which has to be produced during the day to meet day time demand.
So.. if you wash you clothes etc during the night, you are using some of that wasted night time energy whilst reducing day time demand. Many energy companies reward you for using night time energy at lower rates. Check your bills!
I hope that made sense!
Now the only problem is for those of you that want to be considerate to neighbours…. eeek.
I am also entering this in the British Gas Smart Challenge