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are automatically stored and the XP-COMPACT switches back to normal 
operating condition. 

5.4.3  Auxiliary Contact as generator starter 
As per the battery capacity 
When in the programming of the Auxiliary Contact, the Battery Capacity (LED 15-18) 
is used as a condition, you must then take note of the following requirements. 
If you have to start an emergency back-up supply with a battery having a certain 
residual capacity, then two battery levels must be programmed. The first (i.e. Battery 
25% LED 17) for the starting or activating the Auxiliary Contact and the second (i.e. 
Battery 100% LED15) for stopping or disabling the Auxiliary Contact. Programmed 
like this the Auxiliary Contact works with the lowest set condition and stops when it 
has reached the highest programmed condition through charging. 
Example: start of a generator with the XP-COMPACT 
In order to program the auxiliary contact to start at 25% and to stop at 75% of the 
battery state-of-charge, here is the procedure to follow: 

−  Press the key AUX. CONTACT (Program) 21 during at least 2 seconds. Then 

the states will be displayed blinking (factory settings LED’s 10/11/12/13). As 
these states are not wished for the start of the generator, they must be disabled. 

−  With the key (select) 20, select the LED’s to disable (the active LED’s are 

blinking) and disable them with the key 19 Change Status. Select the other 
LED’s to switch off with the key (select) 20 and switch them off with the key 19 
Change Status until all are disabled. 

−  Then select the LED 17 with the key (select) 20 and activate the contact with the 

key 19 Change Status. The generator will start once the LED 17 switches of.  

−  Then select the LED 16 with the key (select) 20 and activate the contact with the 

key 19 Change Status. The generator will stop once the LED 16 switches on.  

−  If no key is activated during 30 seconds, the normal operation states are 

displayed automatically again. 

For a control the key Program can be pressed at least 2 seconds. The values set are 
displayed blinking. 

5.4.4  Auxiliary Contact as Twilight Witch (with solar charger option) 
The Auxiliary Contact of the XP-COMPACT can also be used as a twilight switch, i.e. 
to operate automatically the exterior lighting.  With it the connected solar modules 
measure the light intensity. If the XP-COMPACT is operating without solar modules 
and a twilight-switching function is desired, you can connect small solar cells with the 
nominal voltage of the XP-COMPACT on to the SOLAR terminals for the purpose of 
measuring the light intensity. To function as a twilight-switch the Auxiliary Contact 
must be programmed so that the condition SOLAR CHARGE (LED 3) is active. 
Programming must be carried out in steps and in accordance with the description for 
the programming of the Auxiliary Contact. 

5.4.5  Power cut of the second priority loads 
The auxiliary contact can also be used to cut the power of less priority loads when 
the battery state of charge is lower than a given threshold. In that case, only one of 
the battery state of charge, or the “transfer” function will be programmed as power cut 
criteria. 
The second priority loads will be supplied only when the generator is ON or when the 
battery has a sufficient threshold.