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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.
It can be also an "follow up" alarm after "Can Communication Failure".
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:
- Check the battery that the RED LED - at the battery - is not shining or flashing !
- If its shining or flashing the battery is too empty to work. Please charge the battery with an external charger until the LEDs went back to green.
- 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.
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.
