Display Reading: Blank

Time of Day: Daytime/Nighttime

Possible Causes:

Battery or fuse connection and/or solar panel connection (Daytime only) or battery or fuse connection (Nighttime only).

Remedy:

Check all connections from the controller to the battery including checking for correct wire polarity. Check that all connections are clean, tight, and secure. Ensure the battery voltage is above 8 volts.

Further Steps (if required):

Check the voltage at the controller battery terminals with a voltmeter and compare with a voltage reading at the battery terminals.

If there is no voltage reading at the controller battery terminals, the problem could be a fuse, or the wiring between the battery and the controller. If the battery voltage is lower than 8 volts the controller will not function.

For the solar panel, repeat steps 1 and 2 substituting all battery terminals with solar panel terminals.

Display Reading: 0

Time of Day: Daytime/Nighttime

Remedy: Check all connections from the controller to the battery including checking for correct wire polarity. Check that all connections are clean, tight, and secure.

Display Reading: Full battery icon flashing

Time of Day: Daytime/Nighttime

Remedy:

Overvoltage error. Disconnect the solar controller from the battery and put a draw on the battery (turn lights or a fan on) to drain the battery.

Reconnect solar panel after a few minutes. Repeat as needed.

Display Reading: Empty battery icon flashing

Time of Day: Daytime/Nighttime

Remedy:

Undervoltage error. Battery is too low to register a voltage to the solar controller. Plug your RV/trailer in to shore power to recharge battery to above 8v.