Go Power IC3000 tech question

SO according to the manual the voltage cut out ( back to grid ) is 85 volts... mine is 65 and it will not adjust has anyone had this issue or know anything about it?
( VAC Dropout 85 VAC ) - out of manual

sorry correction vac drop out on mine is 65 volts, below this the inverter goes from charger to inverter mode and kicks off grid ( not back to grid ) I need this to be 85 ... but mine won't adjust