Indigo and Backup Generators

This is the learning so far in trying to solve for the following use case:

A whole house backup generator kicks in automatically during power failure and
'brown outs'. Need to turn off all non-essential equipment when the generator
kicks in.


So the scenario for the use case so far looks like this:

Utility Power goes out >>

Four Pole ice cube Relay opens circuit to non essential equipment(see diagram below), Mac powers down,
backup generator starts up>>

Backup Generator is up, Mac powers up and Indigo pings an IP device on the utility side only
to determine when utility power is up >>

Utility Power comes Back>>

Indigo checks if Utility Power has been stable for some 30 minutes.

If Utility power has been stable Indigo to send a 'restore' signal to the ice cube relay.(I
still have to source a IP to contact closure device.)