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I have eg4 600xp. Connected 1500 watts pv to unit, but display and phone monitor shows 0 watts input. So I am unable to charge 3 ll batteries. The pv input switch is turned on Is there something in settings I need to change?

When connected to inverter pv+1 pv-1, multimeter shows 0 volts. When I disconnect one of wires from inverter, multimeter shows 170 volts