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What should I do if a charging station or Smart Charging Network loses connection to an external energy meter (P1 Port)?
 
This troubleshooting guide will help you to locate issues with a lost P1 signal.
 
If the connection to a (D)SMR meter is lost, a charging station or SCN will fall back to the set TotalSafeCurrent for Active Load Balancing. 
If this occurs during installation, please check the following:
  • Is the cable between smart energy meter and charging station in a good condition? 
    Tip: use an Ethernet cable tester to check the condition of the cable.
  • Is the smart energy meter still working correctly? 
    Refer to the documentation of the device to troubleshoot.
  • Is the RJ11/RJ12 correctly pinched? 
    Please, make sure the wires are connected 'straight' (not twisted) and the RJ11/RJ12 connector is correct and firmly pinched.
     
  • Is the smart meter using (D)SMR protocol version 4.0 or up?
    Lower protocol versions do not support Smart Charging. Please, discuss the possibilities to upgrade the smart meter with your distribution system operator.
     
  • Using a P1 splitter? 
    Please, check whether the connection works without using the P1 splitter. If it works without the splitter, the P1 splitter is likely faulty.
     
  • The incorrect installation of a P1 range extender/signal converter or splitter may cause a communication loss. 
    Please, refer to the documentation of the device to troubleshoot.

 

If the communication loss occurs after it has functioned properly before with the setup, the physical connection in the cable or connector might have broken. 
If the communication loss occurs occasionally, the issue might be caused by a weak P1 signal. 
Please check the following:

  • Is the RJ11/RJ12 connector still correctly placed in the smart meter? 
    To be sure, unplug the connector and plug back in securely.
     
  • The P1 signal is only transportable over a cable length of maximal 20 meter. 
    A longer distance between smart energy meter and charging station might result in a communication loss.
     
  • Using a P1 range extender/signal converter? 
    Please, refer to the documentation of the device to troubleshoot.
Keywords: P1, External Meter, Lost, Connection, Smart, Meter