Below are my household electricity usage graphs. They are created by a Raspberry Pi connected to a Current Cost electricity monitor, the type that the electricity companies gave a way a couple of years ago, which can be purchased on Ebay still.
You might also be interested in my graphs for the temperatures in and around the house, Combined, Hall, Freezer, Outside and the Garage
Last 5 mins
Last 15 mins
Last hour
Last 24 hours
Last week
Last month
Last year
