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Error codes by brand

Kstar error codes

54 codes documented in Kstar's inverter and battery manuals. Pick yours to see what it means, what you can safely check, and when to call your installer.

WattMate is not affiliated with Kstar. This page summarises Kstar's own published documentation; your installer and Kstar are the authority on your system. WattMate doesn't repair systems or make site visits.

Battery codes

  • F00Soft Time Out
  • F01INV Volt Short
  • F02GFCI Sensor Fault
  • F03System Always Fault
  • F04Bus Volt Low
  • F05Bus Volt High: The bus voltage is high.
  • F06Bus Short Circuit
  • F07PV ISO Under Fault
  • F08PV Input Short Circuit
  • F09Bypass Relay Fault
  • F10INV Curr Over
  • F11INV DC Over
  • F12Ambient Over Temp: The ambient temperature is too high.
  • F13Sink Over Temp
  • F14Grid Relay Fault
  • F15DisChg Curr Over
  • F16Chg Curr Over
  • F17Current Sensor Fault: A failure occurred to the current sensor.
  • F18INV Abnormal
  • F19EPS Relay Fault
  • F20Alway Over Load
  • F32SCI Fault
  • W00Grid Volt Low
  • W01Grid Volt High
  • W02Grid Frequency Low
  • W03Grid Frequency High
  • W04Solar Loss
  • W05Bat Loss
  • W06Bat Under Volt
  • W07Bat Volt Low
  • W08Bat Volt High
  • W09Over Load
  • W10GFCI Over
  • W11LN Reverse
  • W12Fan Fault
  • W13BAT Power Down
  • W14BMS Discharge Over Current
  • W15BMS Charge Over Current
  • W16BMS Over Volt
  • W17BMS Over Temp
  • W18BMS Discharge Low Temp
  • W19Bms Volt Imbalance
  • W20Bms Communicate Fault
  • W21BMS Under Volt
  • W22Bms Chg Temp Low
  • W23BMS Severe Over Volt
  • W24BMS Severe Over Temp
  • W25CT Reverse

Inverter codes

  • F00Soft Time Out: Soft-start timeout.
  • F00-F03AC voltage & frequency are too high or too low
  • F01INV Volt Short: The inverter output is shorted.
  • F02GFCI Sensor Fault: A failure occurs to the Ground Fault Circuit Interrupter (GFCI) sensor.
  • F03System Always Fault
  • F04Bus Volt Low: The bus voltage is low.
  • F04-F05Bus voltage is too high or too low
  • F05Bus Volt High: The bus voltage is high.

Find the Kstar manual for your model

When to call your installer or the warranty line

Your installer is your first warranty contact. If they've gone, the manufacturer's warranty line still covers the hardware. Don't open the inverter or battery case yourself: work inside it is for a licensed electrician.

If you see smoke, scorch marks or smell burning, switch the system off at the AC and PV isolators and call your installer. If anyone is in danger, call 000.

Kstar warranty email
service_solarinverter@kstar.com
Kstar service network
Open the manufacturer's service page
  1. Try the free fixes first

    Most faults are an isolator, a WiFi drop or a known error code. Start with the lookup and guides above.

  2. Then call the people who are responsible for it

    Your installer is your first warranty contact. If they've gone, the manufacturer's warranty line still covers the hardware.

    Find the manufacturer's warranty line
  3. If it's near the end of its life, see what replacing it would do

    A free energy audit report sizes a new system for your actual bills and shows what a replacement would do. Your first results need no details; your details only reach installers if you ask for the full report.

    Get your free energy audit report
  • F06Bus Short Circuit: The bus is shorted.
  • F07Insulation impedance Fault
  • F08Input Current High
  • F09Hardware Current High
  • F10Inverter Current High
  • F11Inverter DC Current high
  • F12Ambient Temperature Over
  • F13Heatsink Temperature High
  • F14AC Relay Fault
  • F15PV Input Voltage Low
  • F16Remote Off
  • F18SPI communication Fault
  • F20Leakage Current High
  • F21Leakage Current Self-Checking Failure
  • F22Consistency Voltage Fault
  • F23Consistency Frequency Fault
  • F24DSP Operation Fault
  • F32DSP communication Lost