I use this with my electric dryer for power off notification to Alexa TTS. Pricey, but it works reliably. Custom driver available in Community to monitor power.
This is a driver for the Aeotec Heavy Duty Smart Switch (https://aeotec.com/outdoor-z-wave-switch ) model ZW078. It's a port of the Smart Switch 6 code with appropriate functions add/removed. You can safely use the built-in HDSS driver for this device, but there were a couple of functions missing and I didn't like having dimmer and color settings on the switch controlling my dryer, even if the device would ignore those commands.
Edit 5/14/19: (This is now a whole new device driver since my oriβ¦