We already have in stock new extension module for NetControl: AC voltage detector VDS300.
With VDS300 NetControl will easily detect the presence/absence of the mains (or any AC voltage in the range 24 to 220VAC) and perform automated task (e.g. switch relay). Usage with the Cloud Platform will also extend the functionality with reporting and alerting.
VDS300 uses the 'Alarm' input of NetControl.