I thought I would share this rule I created which sends out a notification when power loss is detected and when power has been restored. Additionally it sends a notification every hour during power loss saying that power is still off.
For this, I have the SmartHub and Internet router powered by a UPS (so it is on battery power). Not sure how long the Habitat will last on battery, but I'm sure it's a long long time given my setup.
Feel free to offer suggestions, as I am quite new to the Rule Machine.