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    How can I set my MPPT 60-150 to control external circuit at a desired voltage?

    Installers can connect a relay to the unit and the unit can be set for both a low battery voltage and high battery voltage trigger, the desired condition to activate the Aux Output.

    Installer will need to configure the auxiliary output, the auxiliary output provides between 5 and 13 volts DC (configurable) and up to 200 milliamps to power a relay, indicator light, vent fan, or alarm.

    Trigger Source Descriptions
    Low Batt Voltage Activates the auxiliary output when the battery voltage falls below the trigger setting for the trigger delay time. Deactivates the auxiliary output when the battery voltage rises above the clear setting for the clear delay time. Use this setting if you want the auxiliary output to control a relay to disconnect loads from a battery that is nearly discharged, or to activate a lowbattery voltage alarm such as a buzzer or light.
     
    Hi Batt Voltage Activates the auxiliary output when the battery voltage rises above the trigger setting for the trigger delay time. Deactivates the auxiliary output when the battery voltage falls below the clear setting for the clear delaytime.
    This setting is useful for:
    • installations that have another external charging source such as a wind generator or hydro generator connected directly to the batteries. The XW SCC auxiliary output can control a relay to disconnect the external charging source from the battery when the battery is in danger of being overcharged, or control a relay to turn on a diversion load.
    • activating a high-battery-voltage alarm such as a buzzer or light.
    • activating a vent fan to disperse hydrogen from the battery compartment when the batteries reach their gassing voltage.
     
    Hi Array Voltage Activates the auxiliary output when the PV array voltage rises above the trigger setting for the trigger delay time. Deactivates the auxiliary output when the PV array voltage falls below the clear setting for the clear delay time. Use this setting if you want the auxiliary output to control a series latching relay to disconnect the PV array from the XW SCC or trigger an alarm when the PV array voltage exceeds the trigger setting (the XW SCC maximum operating voltage is 140 Vdc). You can also use the Hi Array Voltage trigger to control a relay to turn on a night light. Set the Trigger Level to your nominal battery voltage and the Output Mode to Active Lo. This will energize the relay and turn on the light whenever the array voltage is insufficient to charge the battery bank.
     
    Low Batt Temp Activates the auxiliary output when the battery temperature falls below the trigger setting for the trigger delay time. Deactivates the auxiliary output when the battery temperature rises above the clear setting for the clear delay time. Battery temperature is measured with a battery temperature sensor. Do not use this setting if a battery temperature sensor is not installed. With this setting, the auxiliary output can turn on an indicator alarm if the batteries are too cold. A battery with frozen electrolyte will not accept a charge. 

    Hi Batt Temp Activates the auxiliary output when the battery temperature rises above the trigger setting for the trigger delay time. Deactivates the auxiliary output when the battery temperature falls below the clear setting for the clear delay time. Battery temperature is measured with a battery temperature sensor. Do not use this setting if a battery temperature sensor is not installed. With this setting, the auxiliary output can turn on a fan to cool the battery compartment. 

    Hi Heat Sink Temp Activates the auxiliary output when the XW SCC heat sink temperature rises above the trigger setting for the trigger delay time. Deactivates the auxiliary output when the heat sink temperature falls below the clear setting for the clear delay time. This setting can be used to trigger an alarm. 

    Fault Activates the auxiliary output when a fault occurs. This setting can be used to turn on an alarm or indicator light. When Fault is selected as the trigger source, there is no programmable trigger level or clear level. You also cannot select a specific fault as an auxiliary output trigger.

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