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1). Press Menu Button
2). Scroll to "PV V Start" on the screen of the unit
3). Press Enter Button
4). The unit will prompt a password request, type "5" "9" "4" followed by Enter Button
5). Set "PV V Start" to roughly 350V which should be a lowered enough value to bring the unit online
6). Press Menu Button until the home screen appears, it should display reconnect Count Down 300 sec
Once the countdown is done, the unit should come online and start harvesting given that the panel voltage is higher than 350V. If the unit does not wake up even after the PV V Start is lowered, and you can confirm that the PV Voltage is present and higher than PV V Start then check FAQ article FA222305.