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EPEver Error Codes

Expert reference guide covering all EPEver charge controller diagnostic codes with comprehensive troubleshooting procedures and professional repair guidance

Quickly identify problems with your EPEver solar charge controller and learn the correct response procedures

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EPEver Charge Controller Models

EPEver (also known as EPEVER) produces high-quality MPPT (Maximum Power Point Tracking) solar charge controllers for off-grid and hybrid solar systems. EPEver charge controllers are known for their efficiency, reliability, and advanced MPPT technology. The product line includes Tracer series controllers with various current ratings (10A, 20A, 30A, 40A, 50A, 60A, and higher) for different system sizes. These diagnostic codes are applicable to the majority of EPEver charge controller systems. Error indicators typically manifest as error codes displayed on the controller LCD screen, LED status lights, or in the monitoring software. Error codes follow a two-digit numeric format (e.g., 01, 02, 03).

How to Read Error Codes

• Check controller LCD screen for error code display
• Review LED status indicators on controller
• Check monitoring software for system status messages
• Note error code format (e.g., 01, 02, 03)
• Consult EPEver documentation for your specific model
• Error codes are two-digit numbers

EPEver Product Series

• Tracer Series - MPPT charge controllers
• Various Current Ratings - 10A to 100A+
• 12V, 24V, 48V Systems - Different voltage ratings
• Monitoring Systems - Advanced system monitoring
• Remote Monitoring - PC and mobile app support

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Understanding Diagnostic Codes

EPEver charge controller systems incorporate sophisticated diagnostic capabilities that automatically detect operational issues. When a problem is identified, the system communicates through error codes displayed on the controller LCD screen, LED status indicators, and status messages in the monitoring software. Error codes follow a two-digit numeric format (e.g., 01, 02, 03). This intelligent diagnostic framework enables rapid problem identification and helps determine the appropriate response. All EPEver charge controller series utilize continuous performance monitoring with real-time error detection. Error codes may vary slightly depending on firmware version and model. Always reference your specific model's installation manual for precise code definitions and consult with a certified EPEver installer for professional diagnosis and repair.

Battery Voltage Errors

Problems with battery voltage levels and protection.

Code	Meaning	Possible Causes	Solutions
01	Battery Overvoltage - Battery voltage exceeds maximum limit	•Battery voltage too high •Overcharging condition •Battery charging issue •Voltage regulator fault •Battery cell imbalance	Check battery voltage Verify battery voltage is within recommended range Check battery charging settings Inspect battery condition If error persists, contact installer Professional diagnosis may be required
02	Battery Undervoltage - Battery voltage below minimum limit	•Battery voltage too low •Battery discharged •Deep discharge condition •Battery aging •Battery cell imbalance	Charge battery to bring voltage to acceptable level Check battery condition Verify battery capacity If battery is deeply discharged, use appropriate charging method If error persists, contact installer Battery replacement may be necessary

Load Circuit Errors

Problems with load circuit and output protection.

Code	Meaning	Possible Causes	Solutions
03	Load Circuit Overload - Current in load circuit exceeds maximum limit	•Load current too high •Connected load exceeds controller capacity •Load circuit overload •Multiple loads connected	Reduce load to keep current within allowable range Check connected loads Verify load ratings match controller specifications Disconnect unnecessary loads If error persists, contact installer
04	Load Circuit Short Circuit - Short circuit detected in load circuit	•Short circuit in load wiring •Faulty load connection •Damaged load wiring •Load device failure	Do not restart controller until short circuit is resolved Check load wiring for shorts Inspect load connections Test load devices for faults Repair or replace faulty wiring Contact installer if unable to locate short circuit This is a safety condition requiring immediate attention

Temperature Errors

Problems with controller and battery temperature.

Code	Meaning	Possible Causes	Solutions
05	Controller Overtemperature - Controller temperature exceeds maximum limit	•Controller temperature too high •Insufficient ventilation •High ambient temperature •Direct sunlight exposure •Blocked air vents •Controller overload	Improve ventilation around controller Reduce ambient temperature Ensure controller is not exposed to direct sunlight Check that air vents are not blocked Verify adequate clearance around controller Reduce load if controller is overloaded Allow controller to cool down before restart If error persists, contact installer

PV System Errors

Problems with PV array voltage, current, and connections.

Code	Meaning	Possible Causes	Solutions
06	PV Overvoltage - PV module voltage exceeds maximum limit	•PV voltage too high •Too many modules in series •Cold weather voltage rise •Incorrect PV array configuration •Open circuit voltage exceeds controller limit	Check PV array voltage Verify PV voltage is within allowable range Review PV array configuration Account for cold weather voltage rise in calculations Reduce number of modules in series if necessary Verify module specifications match controller requirements Contact installer to verify PV array configuration
07	PV Short Circuit - Short circuit detected in PV array	•Short circuit in PV wiring •Faulty PV module •Damaged PV wiring •PV connection issue •Module junction box fault	Do not restart controller until short circuit is resolved Check PV wiring for shorts Inspect PV module connections Test PV modules for faults Check junction boxes for damage Repair or replace faulty wiring or modules Contact installer if unable to locate short circuit This is a safety condition requiring immediate attention
08	PV Overcurrent - PV array current exceeds maximum limit	•PV current too high •Too many modules in parallel •Incorrect PV array configuration •Current exceeds controller capacity	Reduce number of parallel-connected PV modules Check PV array configuration Verify current ratings match controller specifications Review parallel string configuration If error persists, contact installer May require PV array reconfiguration

Internal Controller Errors

Problems with internal controller systems and components.

Code	Meaning	Possible Causes	Solutions
09	Internal Controller Error - Internal error detected in controller	•Internal controller fault •Control board issue •Software error •Hardware failure •Component malfunction	Restart the controller Turn controller OFF and ON again If error persists, contact EPEver technical support This requires professional diagnosis Controller may need repair or replacement Do not attempt DIY repairs

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Critical Safety Notice

Do not attempt DIY repairs on your EPEver solar charge controller system. The majority of diagnostic codes relate to high-voltage DC electrical systems, battery safety mechanisms, or critical safety features. Specific codes requiring immediate professional intervention include: 04 (Load Circuit Short Circuit), 07 (PV Short Circuit), and 09 (Internal Controller Error). Upon encountering these codes, immediately shut down the system if safe to do so and contact a certified EPEver installer without delay.

Professional service is mandatory—contact a licensed solar installer or reach out to EPEver technical support for expert assistance.

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Maintenance Guidelines

Scheduled Service Requirements

✓Professional inspection and service annually by certified EPEver installer
✓Monthly visual inspection of solar panels for damage or soiling
✓Clean panels quarterly or as needed based on local conditions
✓Monitor system performance daily through monitoring software
✓Check controller status and LCD screen monthly
✓Monitor battery voltage and health regularly

Proactive Maintenance Strategies

✓Keep panels clean to maximize energy production
✓Trim trees and vegetation to prevent shading
✓Inspect DC wiring and connections for damage or corrosion
✓Monitor charging trends for early problem detection
✓Ensure adequate ventilation around controller
✓Review system alerts and error codes promptly
✓Regularly check battery connections and condition

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Frequently Asked Questions

What does error code 01 (Battery Overvoltage) mean?

01 indicates that battery voltage has exceeded the maximum limit. Check battery voltage and verify it is within the recommended range. Check battery charging settings and inspect battery condition. If the error persists, contact your installer. Professional diagnosis may be required.

What should I do if I see error code 02 (Battery Undervoltage)?

02 indicates that battery voltage has fallen below the minimum limit. Charge the battery to bring voltage to an acceptable level. Check battery condition and verify battery capacity. If the battery is deeply discharged, use an appropriate charging method. If the error persists, contact your installer. Battery replacement may be necessary.

What does error code 04 (Load Circuit Short Circuit) mean?

04 indicates a short circuit has been detected in the load circuit. This is a safety condition. Do not restart the controller until the short circuit is resolved. Check load wiring for shorts, inspect load connections, and test load devices for faults. Repair or replace faulty wiring. Contact your installer if unable to locate the short circuit.

What should I do if I see error code 05 (Controller Overtemperature)?

05 indicates that controller temperature has exceeded the maximum limit. Improve ventilation around the controller, reduce ambient temperature, ensure the controller is not exposed to direct sunlight, and check that air vents are not blocked. Verify adequate clearance around the controller and allow it to cool down before restart. If the error persists, contact your installer.

How do I check error codes on my EPEver charge controller?

Error codes can be viewed on the controller LCD screen, through LED status indicators on the controller, or in the monitoring software. Check the LCD display for error messages (typically two-digit numbers like 01, 02, 03), observe the LED status lights, and use the monitoring software to view system status and error history.

What does error code 07 (PV Short Circuit) mean?

07 indicates a short circuit has been detected in the PV array. This is a safety condition. Do not restart the controller until the short circuit is resolved. Check PV wiring for shorts, inspect PV module connections, test PV modules for faults, and check junction boxes for damage. Repair or replace faulty wiring or modules. Contact your installer if unable to locate the short circuit.

Can I reset error codes by restarting the controller?

Some error codes (like 09 for internal errors) may be resolved by restarting the controller, but many codes indicate serious conditions that require professional diagnosis. Safety-related codes (short circuits, overvoltage) should never be reset without professional inspection. Always follow the recommended solutions for each specific error code and contact a certified installer if the error persists.