800.261.3602
Revised 07/18
LED Indication
The SunExplorer III controller has seven LEDs, six that only illuminate green, and one LED that
can illuminate red, green, & orange depending on the charge stage it is in. Each LED and text
correspond to what is being indicated on the LCD display screen.
LCD displays:
0 to 100%
8 to 16.0 VDC
One of: FL, AG, GL / °F or °C then 77'
0 to 25.0VDC
Charge <1 Amp, 1 to 40.0 Amps
0.0 to 999
One of 7 charging conditions.
(n_c, Sch, Bch, Ach, Ech, Fch, AbE
When the controller goes into night mode, the battery % remaining LED will blink once every 10
seconds. When morning arrives and the solar panel voltage rises above 10VDC the LED will stop
blinking even though the controller has not gone into bulk charge mode. When the solar panel
voltage increases to 16VDC it will enter the bulk charge stage lighting the charge status LED red.
When the battery has charged to the bulk/absorption voltage threshold the controller enters the
absorption charge stage, charge status LED remains red. If you scroll down to the charge status
position the LED will blink red and LCD displays ‘Ach’. Once the absorption time has been satisfied
the controller enters the Float stage.
If the controller is in the float stage of charge and the charge status LED is blinking, it indicates
that the controller’s PWM rate is at 100% and unable to maintain a 13.7VDC float voltage. This
could be caused by either or both, solar panels not providing a high enough charge voltage or the
trailer battery loads are greater than what the solar panels can supply, thus the battery voltage
has dropped below 13.0VDC. When the condition is resolved the controller’s status LED is solid.
It will then check the PV voltage and if greater than 16V, it will perform an auto boost charge (bulk
charge with a 30 minute absorption charge period) then returns to a float charge state.
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