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Renogy Error Codes

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

Quickly identify problems with your Renogy solar system and learn the correct response procedures

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Renogy Product Models

Renogy produces high-quality solar charge controllers, inverters, and DC-DC battery chargers for off-grid and mobile solar applications. Renogy products are known for their reliability, efficiency, and user-friendly design. The product line includes Voyager series (PWM charge controllers), Rover series (MPPT charge controllers), Phoenix series (inverters), and DC-DC battery chargers. These diagnostic codes are applicable to the majority of Renogy charge controller and inverter systems. Error indicators typically manifest as error codes displayed on the controller LCD screen, LED status lights, or through LED indicators on inverters. Error codes follow formats like "E" followed by numbers (e.g., E01, E02, E06) or LED indicators for inverters.

How to Read Error Codes

• Check controller LCD screen for error code display
• Review LED status indicators on controller or inverter
• Note error code format (e.g., E01, E02, E06)
• For inverters, check GFCI LED (yellow) and Error LED (red)
• Consult Renogy documentation for your specific model
• Listen for buzzer/alarm tones on inverters

Renogy Product Series

• Voyager Series - PWM charge controllers
• Rover Series - MPPT charge controllers
• Phoenix Series - Pure sine wave inverters
• DC-DC Chargers - Battery charging systems
• Monitoring Systems - System monitoring and control

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Understanding Diagnostic Codes

Renogy charge controller and inverter 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, or through LED indicators on inverters. Error codes typically follow formats like "E" followed by numbers (e.g., E01, E02, E06) for charge controllers, or LED indicators (GFCI LED yellow, Error LED red) for inverters. This intelligent diagnostic framework enables rapid problem identification and helps determine the appropriate response. All Renogy product 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 Renogy installer for professional diagnosis and repair.

Battery Voltage Errors

Problems with battery voltage levels and protection.

Code	Meaning	Possible Causes	Solutions
E01 / E1	Battery Deep Discharge / Excessive Battery Discharge - Battery voltage too low	•Battery deeply discharged •Battery voltage below minimum limit •Battery aging •Battery cell imbalance •Excessive load on battery	Charge battery to bring voltage to acceptable level Check battery condition Verify battery capacity Reduce load if necessary If battery is deeply discharged, use appropriate charging method If error persists, contact installer Battery replacement may be necessary
E02 / E2	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
E03 / E3	Battery Undervoltage / Insufficient Battery Voltage - Battery voltage insufficient	•Battery voltage too low •Battery discharged •Insufficient charging •Battery capacity issue	Charge battery to bring voltage to acceptable level Check battery charging system Verify battery condition If error persists, contact installer
E14	Battery Reverse Polarity - Battery polarity reversed	•Incorrect battery polarity •Positive and negative wires swapped •Installation error •Battery connection mistake	Check battery polarity Verify positive and negative connections are correct Correct polarity if necessary Do not attempt to correct while system is powered Contact installer if unsure about connections
E15	No Battery Detected - Battery not detected by controller	•Battery not connected •Battery connection loose •Battery connection fault •Battery voltage too low to detect	Check battery connections Verify battery is properly connected Check battery voltage Ensure battery terminals are clean and secure If error persists, contact installer

Load Circuit Errors

Problems with load circuit and output protection.

Code	Meaning	Possible Causes	Solutions
E04 / E4	Load 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
E05 / E5	Load Overload - Load current 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

Temperature Errors

Problems with controller and battery temperature.

Code	Meaning	Possible Causes	Solutions
E06 / E6	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
E07 / E7	Battery Overtemperature - Battery temperature exceeds maximum limit	•Battery temperature too high •High ambient temperature •Insufficient battery ventilation •Battery overheating during charging	Improve battery ventilation Reduce ambient temperature around battery Check battery installation location Allow battery to cool down If error persists, contact installer Professional diagnosis may be required

PV System Errors

Problems with PV array voltage, current, and connections.

Code	Meaning	Possible Causes	Solutions
E08 / E8	PV Input Overcurrent / Excessive PV Input Current - 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
E10	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
E13	PV Reverse Polarity - PV input polarity reversed	•Incorrect PV input polarity •Positive and negative wires swapped •Installation error •PV connection mistake	Check PV input polarity Verify positive and negative connections are correct Check wiring of solar modules Ensure connections are properly made Correct polarity if necessary Do not attempt to correct while system is powered Contact installer if unsure about connections

Inverter Errors

Problems with Renogy inverters and AC output.

Code	Meaning	Possible Causes	Solutions
GFCI LED (Yellow)	GFCI Fault - Ground fault circuit interrupter activated	•Ground fault detected •GFCI circuit activated •Ground fault in AC circuit •Leakage current detected	Turn off inverter and restart Check for ground faults in AC circuit Inspect AC wiring Test GFCI circuit If error persists, contact installer Professional diagnosis required
Error LED (Red)	Inverter Fault - Overheating, overload, undervoltage, or overvoltage	•Inverter overheating •AC overload •Battery undervoltage •Battery overvoltage •Inverter fault	Turn off all AC devices immediately Allow inverter to cool down Check battery voltage Reduce AC load Do not restart until fault is resolved If error persists, contact installer Professional diagnosis required
Buzzer / Alarm Tone	Inverter Warning - High load with low voltage or cable problem	•High load with low battery voltage •Cable problem •Insufficient battery capacity •Voltage drop in cables	Reduce AC load Check battery voltage Inspect cables for damage or loose connections Verify cable size is adequate Check battery capacity If error persists, contact installer

DC-DC Charger Errors

Problems with Renogy DC-DC battery chargers.

Code	Meaning	Possible Causes	Solutions
E1 (DC-DC)	Supply Battery Overcharge - Supply battery overcharging	•Supply battery overcharging •Charging system fault •Voltage regulator issue	Check supply battery voltage Verify charging system operation If error persists, contact installer
E2 (DC-DC)	Supply Battery Overvoltage - Supply battery voltage too high	•Supply battery voltage too high •Charging system fault •Voltage regulation issue	Check supply battery voltage Verify voltage is within acceptable range If error persists, contact installer
E3 (DC-DC)	Supply Battery Low Voltage Warning - Supply battery voltage low	•Supply battery voltage too low •Battery discharged •Charging system issue	Check supply battery voltage Charge supply battery if necessary If error persists, contact installer
E5 (DC-DC)	Supply Battery Low Temperature Protection - Supply battery temperature too low	•Battery temperature too low •Cold weather operation •Battery below operating temperature	Check battery temperature Ensure battery is within operating temperature range If error persists, contact installer
E8 (DC-DC)	Alternator Overvoltage Warning - Alternator voltage too high	•Alternator voltage too high •Alternator regulator fault •Charging system issue	Check alternator voltage Verify alternator regulator operation If error persists, contact installer
E9 (DC-DC)	Alternator Overcurrent - Alternator current too high	•Alternator current too high •Alternator overload •Charging system issue	Check alternator current Reduce charging load if necessary If error persists, contact installer
E12 (DC-DC)	Starter Battery Reverse Polarity - Starter battery polarity reversed	•Incorrect starter battery polarity •Positive and negative wires swapped •Installation error	Check starter battery polarity Verify positive and negative connections are correct Correct polarity if necessary Contact installer if unsure about connections

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Critical Safety Notice

Do not attempt DIY repairs on your Renogy solar 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: E04/E4 (Load Short Circuit), E13 (PV Reverse Polarity), E14 (Battery Reverse Polarity), Error LED (red) on inverters, and GFCI LED (yellow) on inverters. Upon encountering these codes, immediately shut down the system if safe to do so and contact a certified Renogy installer without delay.

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

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Maintenance Guidelines

Scheduled Service Requirements

✓Professional inspection and service annually by certified Renogy 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 and inverter
✓Review system alerts and error codes promptly
✓Regularly check battery connections and condition

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Frequently Asked Questions

What does error code E01/E1 (Battery Deep Discharge) mean?

E01/E1 indicates that the battery voltage has fallen below the minimum limit (battery deeply discharged). Charge the battery to bring voltage to an acceptable level, check battery condition, and verify battery capacity. Reduce load if necessary. If the battery is deeply discharged, use an appropriate charging method. If the error persists, contact your installer. Battery replacement may be necessary.

What should I do if I see error code E04/E4 (Load Short Circuit)?

E04/E4 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 does error code E13 (PV Reverse Polarity) mean?

E13 indicates that the PV input polarity is reversed. Check PV input polarity, verify that positive and negative connections are correct, and check the wiring of solar modules. Ensure connections are properly made. Do not attempt to correct while the system is powered. Correct polarity if necessary and contact your installer if unsure about connections.

What should I do if the Error LED (red) lights up on my Renogy inverter?

The red Error LED indicates an inverter fault such as overheating, overload, undervoltage, or overvoltage. Turn off all AC devices immediately, allow the inverter to cool down, check battery voltage, and reduce AC load. Do not restart until the fault is resolved. If the error persists, contact your installer. Professional diagnosis is required.

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

Error codes can be viewed on the controller LCD screen or through LED status indicators on the controller. Check the LCD display for error messages (typically in E## format like E01, E02, E06). For inverters, check the GFCI LED (yellow) and Error LED (red) indicators, and listen for buzzer/alarm tones.

What does error code E06/E6 (Controller Overtemperature) mean?

E06/E6 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.

Can I reset error codes by restarting the controller?

Some error codes may be resolved by restarting the controller, but many codes indicate serious conditions that require professional diagnosis. Safety-related codes (short circuits, reverse polarity) 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.