We have http://neur.io/ fitted in the house, can monitor usage from smart phone / web anywhere in the world.
I backed it on Kickstarter, costs $150 now.
By the minute (you can see the fridge / freezer cycling the pump on and off all through the night, then we wake up and lights / kettle get switched on). The kettle was used twice….
[url=https://flic.kr/p/yDrsF1]Neurio2[/url] by Ben Freeman, on Flickr
By day:
[url=https://flic.kr/p/zAtyap]Neurio[/url] by Ben Freeman, on Flickr
In the day one you can see when we were on holiday and then came back and ran the washing machine flat out for a day cleaning walking / biking kit from a week in the Lake District….
In theory it can identify appliances from their power profile, but we don’t have any that it seems to recognise, mainly as we don’t have any really hungry appliances. It endlessly gets the oven and the kettle confused….
[url=https://flic.kr/p/ziXUMB]Neurio2[/url] by Ben Freeman, on Flickr