Are sensors available that report an AC power failure for an individual power outlet it is plugged into? Maybe through Z-Wave automation?
I have found a number of DIY projects that turn a door/window sensor into such a device by replacing the magnet with an inductor powered by the outlet. Once power goes out, the door sensor report an open - if power comes back, the sensor reports a close.
Does something like this exist as a product? I’m interested in monitoring important outlets for e.g. a refrigerator or the heating system.