I have a new install Multiplus 3000 connected with BMV 712, Venus GX and 860 A/H of 12V AGM batteries. System was working great but at 12.5 Volts, the inverter started flashing low power alram then resetting. I used VE.Configure to set low voltage at 11.5V and 12.5V is the reset point. Why is the inverter cycling at 12.5V and below?