There's also meant to be technology that identifies appliances by what appears to be their power signature.
Looks like there are options for this such as https://halfforked.wordpress.com/2018/05/18/low-cost-house-power-monitoring-with-pzem-004-for-home-assistant/ but no nice plug and play options available in the UK.
I interviewed at a company doing this back in 2010 but didn't want to move to Cambridge to didn't take it any further. Probably wouldn't have got it anyway...
@stelfox started
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There's also meant to be technology that identifies appliances by what appears to be their power signature.
Looks like there are options for this such as https://halfforked.wordpress.com/2018/05/18/low-cost-house-power-monitoring-with-pzem-004-for-home-assistant/ but no nice plug and play options available in the UK.