There have been isolated incidents of anomalies with the XW Inverter/Charger and the MPPT where "RESTORE DEFAULTS" will correct the symptom. It is usually related to Xanbus issues, i.e. only one inverter being displayed on the screen in a dual inverter system. There was even a case where the MPPT showed as being in BULK mode on the SCP, but no power out. Restoring to defaults corrected the symptom.