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My growatt inverter manual says that open circuit voltage my not exceed 145 volts DC. So for a renogy 300 watt, 24 volt panel, the open circuit voltage is 38.80. Since I'm running a 48 volt system, I would need 3 of them to get to 72 volts, above the 60 volt minimum of the MPPT voltage range...

My roof faces east, gets plenty of sun in the morning, but not direct sun in the afternoon. Is there an auto tilt mechanism to keep my panels facing the sun?