Here's yesterdays Smartmeter data showing electrical usage at my house in 15 minute slices. I.e. the kWh used in 15 minute intervals.
You can clearly see at night when it was about 79F outside minimal usage and during the heat of Houston daytime around 100F the AC was cycling about every half hour.
Interestingly my baseline looks to be about 100 Wh per 15 minutes which is an average of 400 watts which is Computers/monitors printers on standby, fridge, security lighting, wifi router and TV set top boxes, various remote controlled stuff, wifi smart switches and motion detectors, and handfuls of USB chargers
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