Enphase IQ Battery Error Codes

Complete diagnostic guide for Enphase IQ Battery systems including IQ Battery 3, IQ Battery 10, and IQ Battery 10T models.

LED Status Indicators

Visual status indicators displayed by the IQ Battery LED system for operational states and diagnostics.

Code	Meaning	Possible Causes	Solutions
Blinking Blue	IQ Battery connected to Envoy-S but three-way handshake not completed	•Initial connection phase •Handshake in progress •Communication setup •Network configuration	Wait for handshake to complete (usually 1-2 minutes) Check Envoy-S connection status Verify network connectivity Check Enphase Installer Toolkit for connection status Ensure Envoy-S firmware is up to date Restart Envoy-S if handshake fails to complete
Blinking Green	Three-way handshake successfully completed with Envoy-S	•Successful communication establishment •Proper system configuration •Network connection established	System is operating normally Monitor battery status in Enphase Installer Toolkit Verify battery is responding to commands Check battery charge/discharge status
Fast Yellow Blinking	Battery booting up or establishing connection	•System startup •Initial connection process •Firmware initialization •System reset	Wait for boot process to complete (typically 2-5 minutes) Do not interrupt power during boot Check power supply to battery Verify circuit breaker is properly engaged Monitor for transition to normal operation
Red Blinking (2-sequence)	Error detected - battery requires attention	•System fault •Communication error •Hardware issue •Configuration problem •Safety system activation	Check Enphase Installer Toolkit for specific error code Review system logs for detailed error information Verify all connections are secure Check battery temperature and ventilation Reset circuit breaker if safe to do so Contact Enphase support or qualified technician
Solid Yellow	Battery not operating due to high temperature	•Ambient temperature too high •Inadequate ventilation •Battery overheating •Thermal protection activated	Check ambient temperature (operating range: -10°C to 50°C) Ensure adequate ventilation around battery Maintain minimum 15cm clearance from walls and objects Check for obstructions blocking airflow Allow battery to cool down Verify installation location meets temperature requirements
Solid Blue or Green	Battery in idle mode - color changes from blue to green as charge increases	•Battery not actively charging or discharging •Standby mode •Normal idle operation	Check charge status in Enphase Installer Toolkit Verify battery is properly configured in system Check if battery is waiting for charge/discharge commands Monitor for transition to active operation
Slow Blue Blinking	Battery is discharging	•Active discharge operation •Power being supplied to home •Grid support mode •Backup power mode	Monitor discharge rate in Enphase Installer Toolkit Check battery state of charge Verify discharge is expected based on system settings Monitor for any error conditions during discharge
Slow Green Blinking	Battery is charging	•Active charge operation •Solar power charging battery •Grid charging (if enabled) •Normal charging cycle	Monitor charge rate in Enphase Installer Toolkit Check battery state of charge Verify charging is expected based on system settings Monitor for any error conditions during charging
Slow Yellow Blinking	Rest mode activated	•Battery in rest mode •Scheduled maintenance mode •System optimization •Battery health management	This is normal operation Battery will resume normal operation after rest period Monitor battery status in Enphase Installer Toolkit No action required unless rest mode persists abnormally
LED Off	Battery not operating or powered off	•Power loss •Circuit breaker tripped •Battery disconnected •System shutdown •Emergency stop activated	Check circuit breaker status Verify power supply to battery Check for tripped breakers in electrical panel Verify battery connections are secure Check Enphase Installer Toolkit for system status Contact qualified technician if power issues persist

Communication and Connection Errors

Error codes related to IQ Battery communication with Envoy-S, network connectivity, and system integration.

Code	Meaning	Possible Causes	Solutions
COMM-001	IQ Battery communication failure with Envoy-S	•Network connection issue •Envoy-S offline •Communication cable problem •Firmware mismatch •IP address conflict	Check Envoy-S connection status Verify network connectivity Check communication cables Restart Envoy-S Update Envoy-S firmware if needed Check for IP address conflicts Verify Envoy-S and battery are on same network
COMM-002	IQ Battery unable to complete handshake with Envoy-S	•Handshake timeout •Configuration mismatch •Firmware incompatibility •Network latency •Firewall blocking	Wait for handshake to complete (up to 5 minutes) Check Envoy-S firmware version Verify battery firmware is compatible Check network latency and stability Review firewall settings Restart both Envoy-S and battery
NET-001	IQ Battery network connection lost	•Network cable disconnected •WiFi connection lost •Router issue •Network configuration error •IP address change	Check network cable connections Verify WiFi signal strength Restart router if needed Check network configuration Verify IP address assignment Check Enphase Installer Toolkit connectivity
DATA-001	IQ Battery data not appearing in Enphase Installer Toolkit	•Communication failure •Envoy-S not connected to internet •Account configuration issue •System not properly commissioned	Check Envoy-S internet connection Verify Envoy-S connection to Enphase servers Check account configuration in Enphase Installer Toolkit Verify system commissioning is complete Restart Envoy-S Contact Enphase support if issue persists

Battery Operation Errors

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

Code	Meaning	Possible Causes	Solutions
BATT-001	IQ Battery not charging	•Charging disabled in settings •Battery at full capacity •Temperature protection •Grid connection issue •Solar production insufficient	Check battery charge settings in Enphase Installer Toolkit Verify battery state of charge Check battery temperature Verify grid connection Check solar production levels Review time-of-use settings if configured
BATT-002	IQ 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-of-use settings
BATT-003	IQ Battery capacity degradation detected	•Normal aging •Excessive cycling •Temperature extremes •Deep discharge cycles •Manufacturing defect	Monitor capacity trends in Enphase Installer Toolkit Check battery age and usage patterns Review operating temperature history Contact Enphase support for capacity analysis Consider warranty claim if capacity is below expected
BATT-004	IQ Battery charge/discharge rate reduced	•Temperature protection •Battery health management •System optimization •Safety limits activated	Check battery temperature Verify ventilation is adequate Review battery health status Check for any system warnings Allow system to optimize automatically

Temperature and Environmental Errors

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

Code	Meaning	Possible Causes	Solutions
TEMP-001	IQ Battery temperature too high	•Ambient temperature exceeds limits •Inadequate ventilation •Installation location too hot •Cooling system issue	Check ambient temperature (operating range: -10°C to 50°C) Ensure minimum 15cm clearance from walls Verify adequate airflow around battery Check for obstructions blocking ventilation Consider relocating battery if temperature persists Install additional ventilation if needed
TEMP-002	IQ Battery temperature too low	•Ambient temperature below operating range •Installation in unheated space •Extreme cold conditions	Check ambient temperature (minimum: -10°C) Verify installation location meets temperature requirements Consider heating the space if necessary Check for drafts or cold air sources Review installation location requirements
VENT-001	IQ Battery ventilation inadequate	•Insufficient clearance •Obstructions blocking airflow •Enclosed space •Poor air circulation	Ensure minimum 15cm clearance on all sides Remove any obstructions Verify installation meets ventilation requirements Check for adequate air circulation Consider additional ventilation if needed

Power and Electrical Errors

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

Code	Meaning	Possible Causes	Solutions
PWR-001	IQ 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	IQ 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
ELEC-001	IQ 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	IQ Battery system fault requiring service	•Internal component failure •Firmware error •Hardware malfunction •Safety system activation	Do not attempt to repair Check Enphase Installer Toolkit for detailed error Document error code and symptoms Contact Enphase support immediately Do not bypass safety systems Schedule service with qualified technician
SAFE-001	IQ 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 Enphase support Do not bypass safety systems Wait for qualified technician
FW-001	IQ Battery firmware error	•Firmware corruption •Failed firmware update •Incompatible firmware •Software bug	Do not attempt firmware update without proper knowledge Contact Enphase support for firmware update Verify firmware version compatibility Follow manufacturer update procedures Contact qualified technician for assistance

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Important Information

If you encounter persistent errors or are unable to resolve an issue using the solutions provided, contact Enphase 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 Enphase IQ Battery models (IQ Battery 3, IQ Battery 10, IQ Battery 10T) may have model-specific error codes—always consult your system's documentation and the Enphase Installer Toolkit for the most accurate information.

For technical support, contact Enphase 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 Enphase Installer Toolkit for detailed error information
✓Verify system is properly shut down before any inspection
✓Check battery LED status indicators
✓Verify network connection for Envoy-S and battery
✓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 15cm clearance)
✓Monitor system performance regularly through Enphase Installer Toolkit
✓Maintain proper operating temperature range (-10°C to 50°C)
✓Keep system documentation accessible
✓Maintain proper network connectivity
✓Follow manufacturer maintenance schedule

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Frequently Asked Questions

What does a blinking red LED on my IQ Battery mean?

A blinking red LED in 2-sequence patterns indicates an error that requires attention. Check the Enphase Installer Toolkit for specific error codes, review system logs, verify all connections are secure, check battery temperature and ventilation, and contact Enphase support or a qualified technician if the issue persists.

Why is my IQ Battery LED solid yellow?

A solid yellow LED indicates the battery is not operating due to high temperature. Check ambient temperature (operating range: -10°C to 50°C), ensure adequate ventilation with minimum 15cm clearance from walls, check for obstructions blocking airflow, and allow the battery to cool down.

What should I do if my IQ Battery LED is off?

If the LED is off, the battery is not operating or powered off. Check circuit breaker status, verify power supply to battery, check for tripped breakers in electrical panel, verify battery connections are secure, check Enphase Installer Toolkit for system status, and contact a qualified technician if power issues persist.

How do I fix communication errors with my IQ Battery?

For communication errors, check Envoy-S connection status, verify network connectivity, check communication cables, restart Envoy-S, update Envoy-S firmware if needed, check for IP address conflicts, and verify Envoy-S and battery are on the same network.

Why is my IQ Battery not charging?

Check battery charge settings in Enphase Installer Toolkit, verify battery state of charge, check battery temperature, verify grid connection, check solar production levels, and review time-of-use settings if configured. The battery may be at full capacity or charging may be disabled in settings.

How often should I maintain my Enphase IQ Battery?

Regular maintenance helps prevent many error codes. Ensure adequate ventilation (minimum 15cm clearance), monitor system performance regularly through Enphase Installer Toolkit, maintain proper operating temperature range, schedule professional maintenance annually, and follow manufacturer recommendations for your specific model.

Can I repair Enphase IQ Battery systems myself?

Some basic troubleshooting like checking Enphase Installer Toolkit, verifying network connections, and checking LED status 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 Enphase IQ Battery error codes and LED status indicators is essential for efficient troubleshooting and maintenance. This comprehensive reference enables quick problem identification and guides appropriate response actions. Enphase IQ Battery systems display status through LED indicators and error codes in the Enphase Installer Toolkit to indicate specific issues. Understanding these codes helps maintain system performance and maximizes energy storage efficiency. Enphase manufactures premium battery storage systems including IQ Battery 3, IQ Battery 10, and IQ Battery 10T models, each with model-specific features and status indicators. This guide provides diagnostics and solutions for all common Enphase IQ Battery error codes and LED status indicators.

ℹ️For persistent errors or issues that cannot be resolved using this guide, contact Enphase 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 and LED indicators may vary by system model and software version—always consult your specific system's documentation and the Enphase Installer Toolkit 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.