Skip to main content
WattMate
WattMate
Check my quote
Get quotes
Get quotes

Understand my power

Energy assessmentEnergy calculatorsLearning hub

Work out what to get

Product indexFind my batteryCompare products

Get a fair deal

Plan my installFind installers

Help with my system

Help centreContact supportEmergencyFAQ

Check my quote

Quote checker
0459 742 134admin@wattmate.com.au
  • Independent
  • Transparent flat fees
  • You choose when to share your details
  • WA-only
  • Installers in the WattMate network
WattMateWattMate

Western Australia's solar and battery platform. Free and independent.

Fighting dodgy deals and bill shock, one rooftop at a time.

0459 742 134
admin@wattmate.com.au

Solar journey

  • Get quotes
  • Check my quote
  • Energy assessment
  • Product index
  • Find installers

Learn

  • Learning hub
  • Blog
  • All tools
  • FAQ

Help

  • Help centre
  • Contact
  • Emergency

Company

  • About
  • Compliance
  • Partner with us
  • Pricing

Legal

  • Privacy policy
  • Terms of service
  • Disclosure
  • Cookie policy
© 2026 WattMate Pty Ltd · ABN 27 687 682 220
Supporting members of the Clean Energy Council

Error codes by brand

Pylontech error codes

61 codes documented in Pylontech'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 Pylontech. This page summarises Pylontech's own published documentation; your installer and Pylontech are the authority on your system. WattMate doesn't repair systems or make site visits.

Battery codes

  • Battery Cell ErrBattery cell voltage measured lower than 2.0V
  • Battery damage errorBattery cell voltage measured at less than 2.0V
  • BMU Internal bus errorBMU internal error
  • Current Leakage ErrCurrent leakage greater than 25mA
  • Current Leakage ErrorCurrent leakage exceeds 25mA
  • DC OV ERRInput over voltage error
  • E0PV overvoltage protection
  • E1Battery voltage overrun
  • E2Battery not connected
  • E3AC overvoltage/undervoltage protection
  • E4AC over-frequency and under-frequency protection
  • E5Controller over-temperature protection
  • E6False alarms
  • Emergency stopCommand by external device via dry contactor
  • F2Other routine failures that can be recovered
  • F3Unrecoverable System Failures
  • F4Unrecoverable Critical Failures
  • FEProlonged network failure
  • FFWIFI collector communication failure
  • Input RV ErrD+ D- reversely connected
  • Intern Comm. ERRCommunication failure between module and BMS
  • L0Overheating
  • L1Under-temperature
  • L2Overvoltage
  • L3Undervoltage
  • L4Sleep
  • L5Charge overcurrent
  • L6Discharge overcurrent
  • Relay ErrSwitching relay issue during startup
  • Relay ErrorStart-up procedure problem
  • Safety check failureChip self-test failed
  • Self-test Initial ErrSelf-test module initial operation failure

Inverter codes

  • 01DC bus voltage exceeds the upper threshold
  • 02DC bus voltage falls below the lower threshold
  • 03DC bus voltage soft-start is time-out
  • 04Inverter soft-start is time-out
  • 05An Inverter overcurrent event is detected
  • 06Over temperature fault
  • 07A relay failure event is detected
  • 08DC component in the output current exceeds the upper threshold

Find the Pylontech 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.

We don't have a warranty line on file for Pylontech yet. See the manufacturer contacts we do hold, or ask your installer.

  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
09PV input voltage exceeds the upper threshold
  • 10Auxiliary power failed
  • 11Over-current on PV input is detected
  • 12Leakage current exceeds the allowable range
  • 13PV insulation resistance is too low
  • 14Inverter DC component exceeds the allowable range
  • 15A difference occurred in the readings from the main and secondary controllers
  • 16Leakage current CT failed
  • 17Communication with the main and secondary controllers is interrupted
  • 20Discharge circuit fault
  • 21Soft start in battery discharge fails
  • 22Charging voltage is too high
  • 23Overload fault
  • 24Battery disconnected
  • 25Inverter current is too high for a long time
  • 26Short circuited on inverter output
  • 27Fan fault
  • 28OP Current Sensor fault
  • 29Charger failure
  • 30Version mismatch between controller board and power board
  • 31Reverse connection of input and output wires
  • E0PV overvoltage protection
  • E1Battery voltage overrun
  • E2Battery not connected
  • E3AC overvoltage/undervoltage protection
  • E4AC over-frequency and under-frequency protection
  • E5Abnormal heat dissipation of the system
  • F2Other routine failures that can be recovered
  • F3Unrecoverable System Failures
  • F4Unrecoverable Critical Failures
  • FEProlonged network failure
  • FFWIFI collector communication failure
  • L0Overheating
  • L1Under-temperature
  • L2Overvoltage
  • L3Undervoltage
  • L4Sleep
  • L5Charge overcurrent
  • L6Discharge overcurrent