Pylon US2000C/US3000C/US5000 Battery - Batt_Comm_FAIL - No Battery

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Pylon US2000C/US3000C/US5000 Battery - Batt_Comm_FAIL - No Battery alarms

Issue: Solis Hybrid Inverters display a "Batt_Comm_FAIL" previously "CAN_Comm_FAIL" or "No Battery" alarm when connected to US2000C or US3000C/ US5000 Pylon batteries.  

Can comm Fail error means: This error indicates a communication failure on the CAN (Controller Area Network) bus, meaning the inverter is unable to establish a proper connection with the battery’s Battery Management System (BMS). 

No Battery error means: This error means the inverter is not detecting any connected battery. It could be due to disconnected or faulty cables, a powered-off battery, or incorrect inverter configuration settings. 

SolisCloud Alarm

Batt_Comm_FAIL alarm solution:

Solution 1: Change the cable to the updated version provided by your distributor.

Solution 2: Alter the current cable to the pinout seen below

SN of RJ 45 Cable -

WIOSCAN30RJ1 (new version)

WIOSCAN35RJ3 (old version)

General checks for battery issues:

Checking Communication Between the Inverter and the Battery

To ensure that the inverter is properly communicating with the battery and that the battery is outputting voltage, follow these steps:

1. Check BMS and Battery Voltage on SolisCloud

   • Open SolisCloud and navigate to the battery monitoring section.
   • Select both BMS Voltage and Battery Voltage to verify if the system is detecting the battery correctly.

2. Measure Battery Output Voltage Physically

   • Disconnect the battery from the inverter.
   • Use a multimeter to measure the voltage at the battery terminals.
   • Compare this reading with the Battery Voltage displayed in SolisCloud.

If the battery voltage is significantly lower than expected or not detected in SolisCloud, there may be a communication issue or a problem with the battery itself.