The rear selector switch might be stuck between modes.
Indicates the inverter is connected to grid power. vguard prime 1150 user manual pdf
The grid power is out, and the inverter is drawing power from the battery. The rear selector switch might be stuck between modes
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: Features selectable UPS and Normal modes via a back-panel switch. Operational Instructions Battery Water Reminder
The front display acts as your primary communication tool with the inverter. Here is what the lights mean: