Menu 5：Display solar panel output voltage
Menu 6：Error Code
Note: The voltage value only can be read, but cannot be adjusted; this
voltage is the output voltage of the solar panel. In PWM working mode,
this voltage will be automatically adjusted to be the same as the battery
charging voltage, and the open-circuit voltage of the solar panel will be
displayed when not charging;
Menu 4：Display the current controller temperature
①°F；②°C
Setting method: Same as above.
Note: The system defaults to °F.
Long Press
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