|Average usage per day in KWh|
How much power do you think your house uses when you think you've turned everything off you can? So, that's leaving fridges, freezers, computers you never turn off (I have an excuse, dear!), etc etc.
You don't know? You might be very surprised when you find out.
Our average daily usage in 2010 (as per the graph opposite) was around 18KWh, of which a sizeable amount was being contributed by stuff that was always on - old computers with inefficient power supplies can chew a couple of hundred watts, which is getting on for 5KWh over a day.
Stop for a moment, and think about that.
Scary, isn't it. One computer, probably 60p a day. Over £200 a year.
|A very handy rule of thumb at|
present: if you pay 12p a KWh,
it's accurate to within 5%.
Also: 1 KWh/day for a year = £40
You'll notice our 2011 average is down to about 13KWh/day. Pretty much, just from doing that.
Our 2012 average is down to about 8.5KWh a day. Why? Actually, most of that's a no-brainer. Solar PV. As soon as the solar panels kick in, they start powering the house. Quite literally: once the sun gets out enough that the watts the PV is kicking out pass the magic 'things that are always on' point, we're running the basic functions of the house for free.
On top of that, our washer and dryer now have timers, so we can run them when the sun's out. And we have a new fridge to replace the 10+ year old one, that only uses about 150KWh a year (that's about 17W!).