www.atkinsonelectronics.com Circuit Board Division
800.261.3602 Revised 05/19
Charging Mode LED Definitions
The Charge Mode LED indicates which of the three main PWM charge stages the controller is in:
Bulk charge stage - The LED is lit red
Absorption charge stage - The LED blinks red
Float charge stage - The LED is lit green
If the charge mode LED is not lit, it means that there is not enough sun light to charge the battery,
controller is in night mode.
Charge Type LED Definitions
The charge type LED indicates the types of charge the controller is in:
Soft Charge - The LED is lit red.
Soft charge is set when the battery voltage drops below 11.0VDC.
Once battery voltage climes above 11.5VDC it turns off.
Equalization Conditioning - The LED blinks blue.
Equalization flag is set when the battery voltage drops below 12.1VDC three times in a 14 day
period.
It is continuously lit while in equalization mode.
Auto Boost - The LED blinks magenta when the auto boost flag is set.
It is continuously lit during the bulk and absorption phase of the boost cycle. It turns off once the
controller returns to float stage.
The charge type LED is not normally lit, if any of the above conditions occurs, it will then blink or light
continuously, indicating the charge it’s in.
While in the float charge stage, if the load currents exceeds the solar charge current and the controller
can’t maintain the float voltage, the charge mode LED will blink green. If the battery voltage drops below
13VDC for 5 minutes the controller sets its auto boost flag and blinks the charge type LED magenta. Once
the load is reduced or the solar charge current increases and battery voltage returns to float voltage, the
charge type LED turns on, until it completes the auto boost charge cycle.
Battery Status LED Definitions
The battery status LED indicates six levels of charge: full, high, medium, partial, low and empty.
COLOR POWER BATTERY SOC VDC
Lit Green Full 100% >12.8
Blinking Green High 95 to 70% 12.8 down to 12.4
Lit Orange Medium 70 to 50% 12.4 down to 12.1
Blinking Orange Partial 50 to 30% 12.1 down to 11.8
Lit Red Low 30 to 10% 11.8 down to 11.5
Blinking Red Empty 0% <11.5
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