Arduino Power Diverter Initial schematic

My plan is to have 2 contractors and a Triac.
On contactor to bypass the Triac ( for full load) , and one contactor to Isolate the Triac ( in case of problems and physical isolation )
There is one CT sensor to detect current flow in and out of the house.
Voltage is monitored so we can detect current direction and also use this for zero-crossing detector.
The rest can be done in software.