ICL Stackable charging and troubleshooting

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Product Series: ICL

Article No: FAQ149

What is a Stackable Charging system?

A stackable charging system typically refers to a setup where multiple chargers can be stacked or connected together to increase charging capacity or convenience. These systems are often used for charging various types of batteries or electric vehicles.


The main benefit of a stackable charging system is its scalability and flexibility. As demand for charging increases, additional units can be added to meet the demand without the need for major application changes. 


How does Delta-Q Stackable System work?

  • The stackable system has one "master" or “primary” charger and all others are “secondary”.
  • The Primary is designated by the shorted jumper on the signal harness.
  • The Primary will work on its own and the Secondary chargers will not work without a Primary active on the bus.
  • The Primary must boot up first before Secondary chargers come online, or they all boot up together.  If the secondary chargers try to join the bus after the Primary boots up the secondary chargers will not be used.
  • When the system was not working it’s possible the charger designated “Primary” did not boot up or was not properly designated the primary.


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  • Ensure each charger has a reliable AC connection, especially the primary, and they all power on together.
  • Plug each charger into the Master signal harness and test them all individually as the Master charger.
  • Once you have identified the unit that has the issue, isolate it and follow the charger service troubleshooting guide.


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