EG4 Signature Solar Battery Error Codes

Complete diagnostic guide for EG4 Signature Solar energy storage systems including inverters and battery modules.

Battery Communication Errors

Error codes related to communication between inverter and battery modules.

Code	Meaning	Possible Causes	Solutions
00	Battery communication error	•Loose or damaged communication cables •Firmware incompatibility •Communication module failure •RS485 communication fault •Battery module disconnected	Check communication cables for secure connection and integrity Ensure both inverter and battery have latest firmware Verify RS485 communication bus connections Check battery module connections Restart inverter and battery system Contact Signature Solar technical support if issue persists
COMM-001	Battery module communication failure	•Communication cable disconnected •Battery module offline •Communication bus issue •Firmware mismatch •Module address conflict	Check communication cable connections Verify battery module is online Check communication bus wiring Verify firmware versions are compatible Check module addresses for conflicts Restart system if safe to do so
COMM-002	Inverter-battery communication timeout	•Communication timeout •Slow communication response •Network congestion •Firmware issue	Check communication cable quality Verify communication bus integrity Check for interference Update firmware if available Contact Signature Solar support

Grid and Voltage Errors

Error codes related to grid connection, voltage levels, and frequency issues.

Code	Meaning	Possible Causes	Solutions
GRID-001	Grid voltage too low	•Utility grid voltage below acceptable limits •Grid instability •Transformer issue •Voltage regulation failure	Check utility grid voltage Contact utility company if grid voltage is consistently low Wait for grid to stabilize Check inverter AC voltage settings Verify grid connection Monitor grid voltage trends
GRID-002	Grid voltage too high	•Utility grid voltage exceeds acceptable limits •Grid instability •Transformer issue •Voltage regulation failure	Check utility grid voltage Contact utility company if grid voltage is consistently high Wait for grid to stabilize Check inverter AC voltage settings Verify grid connection Monitor grid voltage trends
GRID-003	Grid frequency out of range	•Utility grid frequency outside acceptable limits •Grid instability •Generator issue •Frequency regulation failure	Check utility grid frequency Contact utility company if grid frequency is abnormal Wait for grid to stabilize Check inverter AC frequency settings Verify grid connection
GRID-004	Grid connection lost	•Grid outage •Manual grid disconnect •Circuit breaker tripped •Grid connection fault	Check utility grid status Verify grid connection Check circuit breakers Wait for grid to reconnect Contact utility company if grid is down System will automatically reconnect when grid is available

Battery Operation Errors

Error codes related to battery charging, discharging, capacity, and performance issues.

Code	Meaning	Possible Causes	Solutions
BATT-001	Battery not charging	•Charging disabled in settings •Battery at full capacity •Temperature protection •Grid connection issue •Solar production insufficient	Check battery charge settings in monitoring app Verify battery state of charge Check battery temperature Verify grid connection Check solar production levels Review time-based control settings
BATT-002	Battery not discharging	•Discharge disabled in settings •Battery at minimum charge •Grid available (backup mode) •Load demand insufficient •System configuration	Check battery discharge settings Verify battery state of charge Check if system is in backup mode Verify load demand Review system operating mode Check time-based control settings
BATT-003	Battery voltage too low	•Battery deep discharge •Battery capacity degradation •Charging system failure •BMS issue	Check battery state of charge Verify charging system operation Check battery capacity Monitor battery voltage Contact qualified technician if voltage remains low
BATT-004	Battery voltage too high	•Battery overcharging •Charging system fault •BMS issue •Voltage regulation failure	Check battery charging status Verify battery management system operation Check charging system settings Monitor battery voltage Contact qualified technician if voltage remains high
BATT-005	Battery capacity degradation	•Normal aging •Excessive cycling •Temperature extremes •Deep discharge cycles •Manufacturing defect	Monitor capacity trends in monitoring app Check battery age and usage patterns Review operating temperature history Contact Signature Solar support for capacity analysis Consider warranty claim if capacity is below expected
BATT-006	Battery module imbalance	•Battery cell voltage imbalance •Cell aging differences •BMS balancing failure •Battery module issue	Check battery cell voltages Verify BMS balancing operation Monitor cell voltage differences Allow BMS to balance cells Contact Signature Solar support if imbalance persists

Battery Management System (BMS) Errors

Error codes related to BMS operation, protection, and monitoring.

Code	Meaning	Possible Causes	Solutions
BMS-001	BMS overcurrent protection	•Charge or discharge current exceeds limits •BMS current protection activated •Battery module fault •Load demand too high	Reduce load demand Check charge/discharge current settings Verify BMS operation Check battery module status Contact Signature Solar support if issue persists
BMS-002	BMS overvoltage protection	•Battery cell overvoltage •BMS voltage monitoring fault •Charging system overvoltage •Battery cell imbalance	Check battery cell voltages Verify BMS operation Check charging system Monitor battery cell balance Contact Signature Solar support immediately
BMS-003	BMS undervoltage protection	•Battery cell undervoltage •BMS voltage monitoring fault •Deep discharge •Battery cell imbalance	Check battery cell voltages Verify BMS operation Check battery state of charge Monitor battery cell balance Contact Signature Solar support if issue persists
BMS-004	BMS overtemperature protection	•Battery temperature exceeds limits •Inadequate ventilation •Ambient temperature too high •Cooling system failure	Check battery temperature Ensure adequate ventilation around battery Maintain minimum clearance from walls Check for obstructions blocking airflow Check ambient temperature Contact Signature Solar support if temperature remains high
BMS-005	BMS undertemperature protection	•Battery temperature below minimum •Ambient temperature too low •Installation in unheated space	Check battery temperature Verify ambient temperature meets requirements Allow battery to warm up Check installation location Review temperature requirements

Temperature and Environmental Errors

Error codes related to temperature management, ventilation, and environmental conditions.

Code	Meaning	Possible Causes	Solutions
TEMP-001	Battery temperature too high	•Ambient temperature exceeds limits •Inadequate ventilation •Installation location too hot •Cooling system issue	Check ambient temperature (check operating range in manual) Ensure adequate ventilation around battery Maintain minimum clearance from walls Check for obstructions blocking ventilation Consider relocating battery if temperature persists Install additional ventilation if needed
TEMP-002	Battery temperature too low	•Ambient temperature below operating range •Installation in unheated space •Extreme cold conditions	Check ambient temperature (check minimum in manual) Verify installation location meets temperature requirements Consider heating the space if necessary Check for drafts or cold air sources Review installation location requirements
TEMP-003	Inverter temperature too high	•Inadequate ventilation •Ambient temperature too high •Inverter fan failure •Dust buildup blocking airflow	Ensure adequate ventilation around inverter Check inverter fan operation Clean dust and debris from inverter Verify inverter is not in direct sunlight Check ambient temperature Allow inverter to cool down
VENT-001	Battery ventilation inadequate	•Insufficient clearance •Obstructions blocking airflow •Enclosed space •Poor air circulation	Ensure minimum clearance on all sides (check installation manual) Remove any obstructions Verify installation meets ventilation requirements Check for adequate air circulation Consider additional ventilation if needed

Firmware and Software Errors

Error codes related to firmware updates, software issues, and system updates.

Code	Meaning	Possible Causes	Solutions
FW-001	Firmware version mismatch	•Firmware version incompatibility •Incorrect firmware version •Firmware corruption •Update incomplete	Check firmware version Verify firmware compatibility Contact Signature Solar support for firmware update Do not attempt firmware update without proper knowledge Follow manufacturer update procedures
FW-002	Firmware update failure	•Firmware update interrupted •Communication failure during update •Incompatible firmware •Update file corruption	Do not attempt to restart update Check system communication Contact Signature Solar support immediately Do not bypass safety systems Wait for qualified technician
FW-003	Firmware corruption	•Firmware file corruption •Update process failure •Memory error •System crash during update	Do not attempt to repair Contact Signature Solar support immediately System may require factory reset Do not bypass safety systems Wait for qualified technician
SW-001	Software error	•Software bug •Configuration error •System software fault •Memory issue	Check system configuration Review system logs Restart system if safe to do so Contact Signature Solar support Update software if available

Power and Electrical Errors

Error codes related to power supply, electrical connections, and circuit protection.

Code	Meaning	Possible Causes	Solutions
PWR-001	Battery power loss detected	•Circuit breaker tripped •Power supply interruption •Electrical fault •Wiring issue •Grid outage	Check circuit breaker status Verify power supply to battery Check for tripped breakers Inspect electrical connections Verify grid connection Contact qualified electrician if electrical issues persist
PWR-002	Battery circuit breaker tripped	•Overcurrent condition •Short circuit •Ground fault •Electrical overload •Faulty component	Do not reset breaker immediately Check for obvious electrical issues Verify no short circuits Check for ground faults Contact qualified electrician before resetting Do not bypass safety systems
PWR-003	Inverter power loss	•Circuit breaker tripped •Grid outage •AC disconnect switch open •Power supply issue	Check circuit breaker status Verify grid connection Check AC disconnect switch Verify power supply Contact qualified electrician if issues persist
ELEC-001	Battery electrical connection fault	•Loose connections •Corroded terminals •Damaged wiring •Improper installation •Connection degradation	Shut down system before inspection Check all electrical connections Inspect for corrosion or damage Verify proper torque on connections Contact qualified electrician for repairs Do not attempt electrical repairs yourself

System and Safety Errors

Error codes related to system-level issues, safety systems, and critical faults.

Code	Meaning	Possible Causes	Solutions
SYS-001	Battery system fault requiring service	•Internal component failure •Firmware error •Hardware malfunction •Safety system activation	Do not attempt to repair Check monitoring app for detailed error Document error code and symptoms Contact Signature Solar support immediately Do not bypass safety systems Schedule service with qualified technician
SYS-002	Inverter system fault	•Internal component failure •Firmware error •Hardware malfunction •Safety system activation	Do not attempt to repair Check monitoring app for detailed error Document error code and symptoms Contact Signature Solar support immediately Do not bypass safety systems Schedule service with qualified technician
SAFE-001	Battery safety system activated	•Safety protection triggered •Emergency shutdown •Critical fault detected •System protection	Do not attempt to restart without diagnosis Check for obvious safety hazards Review all error codes Contact Signature Solar support Do not bypass safety systems Wait for qualified technician
SAFE-002	Ground fault detected	•Ground fault in wiring •Faulty grounding •Water intrusion •Electrical fault	Shut down system immediately Do not attempt to restart Check for ground faults Verify proper grounding Contact qualified electrician immediately Do not bypass safety systems

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Important Information

If you encounter persistent errors or are unable to resolve an issue using the solutions provided, contact Signature Solar customer support or a qualified solar system technician for professional assistance. Battery systems involve high voltage DC electricity, which can be extremely dangerous. Never attempt to repair electrical components, wiring, or battery modules yourself unless you are a qualified and certified technician. Different EG4 Signature Solar system configurations may have model-specific error codes—always consult your system's documentation and the monitoring app for the most accurate information.

For technical support, contact Signature Solar customer service or consult a qualified solar system technician for expert assistance.

Safety Information: Battery systems operate at high voltages that can cause serious injury or death. Always shut down the system properly before any work. DC electricity from batteries is present whenever the battery is charged, even if the system is off. Never work on battery systems without proper safety equipment and training. Always follow lockout/tagout procedures. Working with battery systems requires specialized training and certification. If you are unsure about any procedure, contact a qualified technician immediately. Never bypass safety systems or attempt repairs you are not qualified to perform.

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Troubleshooting Guidelines

Common Resolution Steps

✓Check monitoring app for detailed error information
✓Verify system is properly shut down before any inspection
✓Check system status indicators and LED lights
✓Verify network connection for monitoring system
✓Check battery temperature and ventilation
✓Document error codes and system status for service calls
✓Contact qualified technician for electrical issues

Prevention Strategies

✓Schedule regular professional maintenance
✓Ensure adequate battery ventilation (minimum clearance required)
✓Monitor system performance regularly through monitoring app
✓Maintain proper operating temperature range
✓Keep system documentation accessible
✓Maintain proper network connectivity
✓Follow manufacturer maintenance schedule

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Frequently Asked Questions

What does error code 00 mean on my EG4 Signature Solar system?

Error code 00 indicates a battery communication error. Check communication cables for secure connection and integrity, ensure both inverter and battery have latest firmware, verify RS485 communication bus connections, check battery module connections, restart inverter and battery system, and contact Signature Solar technical support if issue persists.

How do I fix battery communication errors?

For battery communication errors, check communication cable connections, verify battery module is online, check communication bus wiring, verify firmware versions are compatible, check module addresses for conflicts, and restart system if safe to do so. Contact Signature Solar support if the issue persists.

Why is my battery not charging?

Check battery charge settings in the monitoring app, verify battery state of charge, check battery temperature, verify grid connection, check solar production levels, and review time-based control settings. The battery may be at full capacity or charging may be disabled in settings.

What causes BMS overtemperature protection?

BMS overtemperature protection occurs when battery temperature exceeds limits, ventilation is inadequate, ambient temperature is too high, or cooling system fails. Check battery temperature, ensure adequate ventilation around battery, maintain minimum clearance from walls, check for obstructions blocking airflow, and contact Signature Solar support if temperature remains high.

How do I resolve firmware version mismatch errors?

For firmware version mismatch, check firmware version, verify firmware compatibility, contact Signature Solar support for firmware update, do not attempt firmware update without proper knowledge, and follow manufacturer update procedures. Never attempt to fix firmware issues yourself.

How often should I maintain my EG4 Signature Solar system?

Regular maintenance helps prevent many error codes. Ensure adequate ventilation (minimum clearance required), monitor system performance regularly through the monitoring app, maintain proper operating temperature range, schedule professional maintenance annually, and follow manufacturer recommendations for your specific model.

Can I repair EG4 Signature Solar systems myself?

Some basic troubleshooting like checking the monitoring app, verifying network connections, and checking status indicators can be done safely. However, all electrical work, wiring repairs, and battery repairs must be performed by qualified and certified technicians. Battery systems involve high voltage DC electricity that can be extremely dangerous. Always contact a qualified technician for electrical issues.

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Summary

Proper interpretation of EG4 Signature Solar battery error codes is essential for efficient troubleshooting and maintenance. This comprehensive reference enables quick problem identification and guides appropriate response actions. EG4 Signature Solar systems display error codes through the monitoring app and system displays to indicate specific issues. Understanding these codes helps maintain system performance and maximizes energy storage efficiency. EG4 Signature Solar manufactures premium battery storage systems including inverters and battery modules, each with model-specific features and error code systems. This guide provides diagnostics and solutions for all common EG4 Signature Solar battery error codes.

ℹ️For persistent errors or issues that cannot be resolved using this guide, contact Signature Solar customer support or consult a qualified solar system technician for professional assistance. Some errors may require technical support, component replacement, or specialized diagnostic equipment. Always document error codes and symptoms when contacting support for faster resolution. Note that error code formats may vary by system model and software version—always consult your specific system's documentation and the monitoring app for the most accurate information. Safety should always be the top priority when working with battery systems. Battery systems involve high voltage DC electricity that can cause serious injury or death. Never work on battery systems unless you are a qualified and certified technician. Always follow proper safety procedures and lockout/tagout protocols.