Xantrex Inverter Issues? Try a Hard Reboot
I also find it hard to believe you''d have to wait overnight or 1-3 days with power disconnected from the inverter for a hard boot. Charge capacitance of the inverter should dissipate in minutes. If not, you can create a draw at the inverter output (connect a light bulb or any resistance) to force the drain of residual power.