The controller does everything
The cell phone is merely a wireless remote for accessing the data and settings
The phone does NOT control the solar
I chose that 300 minutes, remember we full-time, I want to maintain voltage not have it drop off, my batteries are Never not being used
If the controller went into float and the fridge is on and other things using power It would start discharging the batteries instead of maintaining voltage and amps for the longest possible time
And I chose that 3mv for similar reasons regarding our use