The energy monitoring mini plug you will find already installed on most retrofit jobs. Home Assistant adopts it locally through the TP-Link integration and starts metering the appliance behind it.
Where to buy
Recipes using this device
Recipes that can use it
These recipes are built around other hardware, and pick this device up as an optional extra.
Leak Auto Shutoff
Installs a Home Assistant automation that closes your water shutoff valve the instant a leak sensor goes wet, so a burst hose or a failed valve stops flooding within seconds. Add a smart plug to cut the appliance, a siren, and a speaker.
Solar Surplus EV Charging
Installs a Home Assistant automation that starts your EV charger when your solar array is producing a surplus and stops it when production drops, so the car pulls from the roof rather than the grid. Add a grid meter and a home battery and it holds back until they are happy too.