Re: Whilst I can see the value.....@Tom Walsh
When I installed an electricity monitor about four years ago, I was appalled by the base load of the house. It prompted me to go through all the devices and thinking what was being left on or on standby which should have been powered off (seriously, CRT tellies in standby can draw 60-100W).
It also encouraged me to identify all of the lights that are on for large parts of the day and making sure that I used the lowest power bulbs that did the job (my house has people in it 24x7 at the moment because my wife does not work and all the kids have moved back in! - seen the sitcom "My Family"? It's like that).
Since then, I have also had nearly all the old CRT tellies replaced by LCD ones (well, it was as good an excuse as any, and an easy Christmas present for the kids with benefits to me), moved my firewall onto a laptop, rationalised the number of devices needed to drive the home network, and made sure that the freezer is kept defrosted (it really makes a difference), and also used smart-power strips to remove the power from several devices when one is put into standby.
I just wish that more devices had physical power switches (and I can't use the switch on the socket because in most places, I have more than one device plugged into the socket, and I want to, for example, power the telly down while leaving the Sky box plugged running)
My base load is still around 500W, and I'm struggling to identify where that is going. Probably not something that a smart meter would help with unless they also supplied per-plug metering devices.
It does make you wonder when you can tell that one of the kids has left their gaming rig on overnight to download some game patches, and you can see 3-400W of additional drain. And also when the gas central heating kicks in, and the electric pump starts drawing 7-800W of power itself.
If only I could persuade my wife that the tumble-drier really is one of the biggest expenses. She will not understand that 2 hours of 2.5KW easily uses more power than 24 hours of 30W for the firewall.