Epever IT5420NC G3 User Manual

Solar charge controller

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Solar Charge Controller

User Manual

IT5420NC G3, IT6415NC G3,

IT6420NC G3, IT7415NC G3,

IT7420NC G3, IT8420NC G3,

IT10415NC G3, IT10420NC G3

IT6415NC G3 BLE, IT10415NC G3 BLE

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Page 1 Solar Charge Controller User Manual IT5420NC G3, IT6415NC G3, IT6420NC G3, IT7415NC G3, IT7420NC G3, IT8420NC G3, IT10415NC G3, IT10420NC G3 IT6415NC G3 BLE, IT10415NC G3 BLE...
Page 2: Table Of Contents
Contents Important Safety Instructions ..................1 Disclaimers ........................3 1 General Information ....................4 1.1 Overview ..........................4 1.2 Appearance ........................6 1.3 Naming rules ........................11 1.4 System wiring diagram ..................... 12 2 Installation ........................ 14 2.1 Attention ..........................14 2.2 Requirements for the PV array ..................14 2.3 Cable specifications ......................16 2.4 Controller installation ......................
Page 3 3.6.2 Setting via RS485 communication port ..............50 4 Others ........................52 4.1 Protections ........................52 4.2 Troubleshooting ........................ 54 4.3 Maintenance ........................58 5 Specifications ......................59 6 Appendixes ....................... 65 6.1 Appendix 1 Dimensions ....................65 6.2 Appendix 2 Index of Abbreviations ................... 70...
Page 4: Important Safety Instructions
Important Safety Instructions Please keep this manual for future reference. This manual contains safety, installation and operation instructions for the IT-NC G3 / IT-NC G3 BLE series solar charge controller (hereinafter referred to as "controller" in this manual).  Read all the instructions and warnings carefully in the manual before installation. No user-serviceable components inside the controller, do not attempt to disassemble or repair the ...
Page 5 WARNING HOT SURFACE: Indicate a danger caused by high temperature, if not avoided, may cause burns to personnel. Read the user manual carefully before any operation.
Page 6: Disclaimers
Disclaimers The warranty does not apply to the following conditions: Damage caused by improper use or inappropriate environments (It is strictly forbidden to install the  controller in the humid, salt spray, corrosive, greasy, flammable, explosive, dust accumulative or other harsh environments).
Page 7: General Information
1 General Information 1.1 Overview IT-NC G3 / IT-NC G3 BLE series incorporates a new design concept, with solar charge controller as the main body and the built in Bluetooth module (only supported by IT-NC G3 BLE series), users can read and set parameters by App on the phone.
Page 8 Features  Low power consumption with static loss less than 50mA Independent voltage stabilization   Advanced MPPT technology, with maximum tracking efficiency not less than 99.5% Supporting two PV inputs to improve PV utilization  ①  Conversion efficiency up to 98.5% Supporting multiple battery types, including lithium batteries ...
Page 9: Appearance
1.2 Appearance Figure 1 Product Appearance...
Page 10 BMS protocol number of 10, 27 or 34, you can connect the batteries directly to port ⓬ manufacturers. When using the Pylon batteries with BMS protocol number of 21, and the Epever by removing the BMS-Link module, and set the BMS protocol number accordingly for BMS communication.
Page 11 RS485 COM port ⓫, see note (2) above. For currently supported BMS manufacturers and corresponding protocols, please go to the EPEVER website to view or download. If the remote temperature sensor is not connected to the controller, the default temperature for battery charging or discharging is 25 °C without temperature...
Page 12 (6) The dry contact port (Oil generator/Utility) is as shown in the figure above with the "Relay" printed on it, where “C” is the common terminal, “NC” is the normally closed contact, and “NO” is the normally open contact. Note: To use only“NO”, or both“NC” and “NO” is subject to the actual control demand of the oil generator when adding the oil generator or there is utility charging in the system.
Page 13 Note: It is not mandatory to connect the oil generator or utility, you can connect them according to your actual needs. (7) Not all the models are equipped with fans, please refer to the actual product. Only IT10415NC G3, IT10420NC G3 and IT10415NC G3 BLE are equipped with fans.
Page 14: Naming Rules
1.3 Naming rules Naming rule for series IT-NC G3  Naming rule for series IT-NC G3 BLE ...
Page 15: System Wiring Diagram
1.4 System wiring diagram No battery mode  When there is no battery, controller of series IT-NC G3 / IT-NC G3 BLE can be connected to the inverter directly. The inverter must be connected to the battery terminals of the controller and meet the following conditions at the same time. 1)When connecting a high-frequency inverter: PV input power >...
Page 16 Ensure that the length of battery connection cable is less than 3 meters.   Ensure that the length of load connection cable is less than 3 meters. Ensure that the length of communication cable is less than 3 meters. ...
Page 17: Installation
2 Installation 2.1 Attention Be careful when installing the batteries. Wear protective goggles when installing flooded lead-acid  batteries, and rinse with clean water in time once in contact with battery acid. The battery and PV connections must be guarded against with inadvertent contact. Install the solar ...
Page 18 IT6415 / 7415 / 10415NC G3, IT6415 / 10415NC G3 BLE:  36-cell 48-cell 54-cell 60-cell Battery Voltage / PV Voc < 23V Voc < 31V Voc < 34V Voc < 38V Specifications Max. Best Max. Best Max. Best Max. Best 72-cell Voc <...
Page 19: Cable Specifications
PV input current. For controller’s maximum PV input current and maximum PV cable specifications, please refer to the table below. Maximum PV Cable Model Maximum PV Input Current Specifications IT5420NC G3 16mm /6AWG IT6415NC G3 IT6420NC G3 16mm...
Page 20: Controller Installation
For the battery, the recommended cable specification is selected according to the conditions that its terminals are not connected to any additional inverter. Load Wiring Specifications  Model Rated Load Current Load Cable Specifications IT5420NC G3 16mm /6AWG IT6415NC G3 IT6420NC G3 16mm /6AWG...
Page 21 When installing the controller, ensure that there is enough air flow through the controller's heat sink, and leave at least 150mm of clearance above and below the controller to guarantee natural convection for heat dissipation. If the controller is CAUTION mounted in a closed cabinet, ensure that heat can be dissipated through the cabinet.
Page 22 Figure 2-2: Installation diagram (IP32)
Page 23: Controller Connection
Step 2: Remove the terminal cover Figure 2-3: Remove the terminal cover (IP43) 2.5 Controller connection Connect the controller in the sequence of “❶Ground > ❷Battery > ❸Load > ❹ PV array > ❺ Communication modules”, and disconnect the controller wiring in the reverse order of Figure 2-3. The following wiring diagram is illustrated with the appearance of "IT10420NC G3”.
Page 24 Figure 2-5: Parallel wiring diagram of multiple controllers (1) Grounding IT-NC G3 and IT-NC G3 BLE series are common-negative controllers. Negative terminals of the PV array, battery and load can be grounded simultaneously, or any negative terminal is grounded.  However, according to the actual application, the negative terminals of the PV array, battery and load can also be ungrounded.
Page 25 (2) Battery connection The protection is triggered if there is only battery connection reversed, but don’t reverse the battery connection if the PV is connected correctly, which may damage WARNING the controller. Do not connect the circuit breaker or fast-acting fuse when wiring and ensure that ...
Page 26 (4) PV modules connection Risk of high voltage! The PV array can generate very high voltage, disconnect the circuit breaker before wiring, and ensure that the leads of "+" and "-" poles are WARNING connected correctly. If controller is used in an area with frequent lightning strikes, an external surge arrester must be installed at the PV input and utility input terminals.
Page 27 (5) Connect optional accessories Connect the BMS-Link module  batteries through the port ⓬; with the setting of the BMS protocol number, the BMS-Link module can When the system uses lithium batteries with BMS function, connect the BMS-Link module and lithium convert the BMS protocols of different lithium battery manufacturers into our standard protocols to realize the communication between the controller and lithium batteries BMS of different manufacturers.
Page 28 communication to improve system safety. Note: It is required to set the BMS protocol number as 32 when connecting the remote temperature sensor to BMS port. If the remote temperature sensor is not connected to the controller, the default temperature for battery charging or discharging is 25°C without temperature CAUTION compensation.
Page 29: Power On The Controller
Note: IT-NC G3 BLE series has built-in Bluetooth module, no external Bluetooth module is required. For specific supported communication module models, please refer to the accessories list. 2.6 Power on the controller Connect the battery’s fast-acting fuse to power on the controller. After the LCD normally displays and ensure the charge enable terminals are connected to the controller, connect the PV array’s circuit breaker.
Page 30: Interface
3 Interface Note: The LCD can be viewed clearly when the angle between the end-user's horizontal sight and the LCD is within 90°. If the angle exceeds 90°, the information on the LCD cannot be viewed clearly. 3.1 Indicator Indicator Color Status Description...
Page 31: Buttons
Indicator Color Status Description Battery under voltage (including battery pack Orange Solid ON under voltage), cell under voltage Solid ON Battery over discharging Battery over temperature, battery low BATT Slowly temperature, cell over temperature, cell low flashing (1Hz) temperature, BMS charging protection, BMS discharging protection Fast Flashing BMS other faults, BMS sensor fault, lithium...
Page 32: Lcd
3.3 LCD 1） Icons Status Name Icon Night Not charging PV array Charging Note: “B, E, F” refer to boost charging, equalization charging and float charging respectively. Displays the input voltage, input current, input power and input energy of PV1 and PV2, see Chapter 3.4.1 PV PV1/PV2 real-time data.
Page 33: Browsing Real-Time Data
3.4 Browsing real-time data 3.4.1 PV After the controller is powered on and works normally, press on the LCD initial interface to display the following PV real-time data interfaces in sequence, you can view PV1 input voltage, PV1 input current, PV1 input power, PV1 input energy, PV2 input voltage, PV2 input current, PV2 input power, and PV2 input energy.
Page 34: Load
3.4.3 Load Press on the real-time data interface of "Battery temperature" to display the following load real-time data interfaces in sequence, you can view the load output current, load output power, load output energy, load operating mode (manual), and load operating mode (sunset load ON). 3.5 Parameters setting Operation steps: ①...
Page 35: Parameters
3.5.1 Parameters The default values and setting range of the controller parameters on the LCD are shown in the following table, except for some read-only parameters, other parameters can be directly modified by the LCD: Parameters Default User define 48V system: AGM, GEL, FLD, LFP15S, LFP16S, LNCM13S, LNCM14S, USER 24V system: AGM, GEL, FLD, LFP8S, LNCM6S, (Battery Type)
Page 36 Parameters Default User define User define: 0 (auto-recognition), 12V, 24V, 36V, 48V Note: After modifying the system rated voltage (Rated level, restart the controller for the modification to Voltage Level) take effect. 16.0V User define: 9.0–17.0V, small step size: 0.1V, large (12V system) step size: 1V.
Page 37 Parameters Default User define 13.8V User define: 9.0–15.5V, small step size: 0.1V, large (12V system) step size: 1V. 27.6V User define: 18.0–31.0V, small step size: 0.1V, large (Float Charging step size: 1V. (24V system) Voltage) 55.2V User define: 36.0–62.0V, small step size: 0.1V, large step size: 1V.
Page 38 Parameters Default User define 11.1V User define: 9.0–15.5V, small step size: 0.1V, large (12V system) step size: 1V. 22.2V User define: 18.0–31.0V, small step size: 0.1V, large (Low Voltage step size: 1V. Disconnect (24V system) Voltage) 44.4V User define: 36.0–62.0V, small step size: 0.1V, large step size: 1V.
Page 39 (Manual Equalize Set to "ON" to enable the controller and start Charging) equalization charging. IT5420NC G3： User define: 1–50A, small step size: 1A, large step size: 10A. IT6415NC G3 / IT6420NC G3 / IT6415NC G3 BLE: User define: 1–60A, small step size: 1A, large step (Battery Max Charging size: 10A.
Page 40 Parameters Default User define User define: 0, 1, 2, 3, 6, 7 0: Manual Mode (Default) 1: Sunset Load ON Mode 2: Sunset Load ON + Timer Mode (Load Control Mode) 3: Timer Mode 6: Always ON Mode 7: Sunrise Load ON Mode Default load switch in manual mode MMDS User define: 0 (Load OFF), 1 (Load ON)
Page 41 Parameters Default User define The second duration of load output, in minutes. WDM2 User define: 0–59 minutes, small step size: 1 minute, (Working Duration large step size: 10 minutes. 2—Minute) Note: It is used for load in “Sunset Load ON + Timer Mode”.
Page 42 Parameters Default User define User define: INDE (independent), CEN (Centralize) When two PV arrays are independently input, the value shall be set to "INDE”. When two PV arrays are connected in parallel as a single input to the controller (the PV terminals need to be paralleled externally), the value shall be set to "CEN”.
Page 43 Parameters Default User define The delayed charging time when PV is underpowered due to weather conditions. User define: 0–60 minutes, small step size: 1 minute, large step size: 10 minutes. When set to “0”, there is no PRCP delay for PV restart charging period. (PV Restart Note: Small step size refers to the parameter value that is increased or decreased by clicking the button...
Page 44: Battery Voltage Control Parameters
Parameters Default User define User define: OFF, ON (Restore Factory When set to "ON", the factory settings are restored once. Settings) Read-only (ARM Firmware NOTE: Please refer to the actual display for the Version) specific version. Read-only NOTE: Please refer to the actual display for the (DSP Firmware Version) specific version.
Page 45 the default values of “ECT” and “BCT” are changed to 120 minutes.  When the battery type is changed to “USER”, the values of lithium battery protection, “ECT” and “BCT” remain the same as the previous battery type. When the default battery type is selected, the battery voltage control parameters cannot be modified.
Page 46 Lithium battery parameters  Battery Type USER USER LFP4S LFP8S Voltage Control Parameters Range Range OVD (Overvoltage Disconnect Voltage) 14.5V 9–17V 29.0V 18–34V 9–15.5V CVL (Charging Voltage Limit Voltage) 14.3V 28.6V 18–31V 9–15.5V OVR (Overvoltage Recovery Voltage) 14.3V 28.6V 18–31V 9–15.5V ECV (Equalize Charging Voltage) 14.2V...
Page 47 LNCM Battery Type USER USER LNCM3S LNCM6S LNCM7S Voltage Control Parameters Range Range OVD (Overvoltage Disconnect 12.8V 9–17V 25.6V 29.8V 18–34V Voltage) CVL (Charging Voltage Limit 12.6V 9–15.5V 25.2V 29.4V 18–31V Voltage) OVR (Overvoltage Recovery 12.5V 9–15.5V 25.0V 29.1V 18–31V Voltage) ECV (Equalize Charging 12.5V...
Page 48: Control Strategy Under Lithium Battery Protocol
LNCM Battery Type USER LNCM13S LNCM14S Voltage Control Parameters Range BVR (Bulk Voltage Recovery Voltage) 52.4V 56.4V 36–62V LVR (Low Voltage Recovery Voltage) 45.5V 49.0V 36–62V UVAR (Undervoltage Alarm Recovery 52.8V 56.9V 36–62V Voltage) UVA (Undervoltage Alarm Voltage) 45.5V 49.0V 36–62V LVD (Low Voltage Disconnect Voltage) 40.3V...
Page 49 Status/Condition Control strategy The BMS sends an exit forced Exit the battery forced charge mode and resumes normal charge command. operating mode. BMS prohibits discharging (including over temperature, Turn off loads. discharge over current, cell under-voltage, etc.) Each control voltage is converted according to the table “Conversion Relationship of Each Control Voltage”, and the system is charged according to the converted voltage value, and the LCD meter displays the converted voltage...
Page 50: Setting Parameters Remotely
Control Voltage Converted Voltage Boost Voltage Charging Voltage Upper Limit - 0.8 × Level Reconnect Voltage Low Voltage Reconnect Discharging Voltage Lower Limit + 0.7 × Level Voltage Under Voltage Alarm Discharging Voltage Lower Limit + 0.7 × Level Recovery Voltage Under Voltage Alarm Discharging Voltage Lower Limit + 0.4 ×...
Page 51: Load Operation Mode
The built-in Bluetooth module (supported by IT-NC G3 BLE series only)  Connect the built-in Bluetooth module of the controller through the mobile phone Bluetooth switch. set the “USER” voltage parameters on the APP through the Bluetooth signal. For specific setting methods, please refer to the cloud APP manual.
Page 52 The default value for “LCM (Load Control Mode)” is 0, it can be set as “0 (Manual Mode), 1 (Sunset Load ON Mode), 2 (Sunset Load ON + Timer Mode), 3 (Timer Mode), 6 (Always ON Mode), 7 (Sunrise Load ON Mode)”.
Page 53: Setting Via Rs485 Communication Port
When “LCM (Load Control Mode)” is set as 1 (Sunset Load ON Mode Mode), 2 (Sunset Load ON Mode + Timer Mode), 7 (Sunrise Load ON Mode) or 0 (Manual CAUTION Mode), only Timer 1 can be set. Timer 2 will be disabled and display as "200". 3.6.2 Setting via RS485 communication port 1) Load operating modes Manual mode (ON by default)
Page 54 Timer Mode  Control the load ON/OFF time by setting the real-time clock. 2） Load operating mode settings The load operating modes can be set by PC software, APP and remote monitoring unit, please refer to Chapter 3.5.4 Setting parameters remotely for wiring diagram and setting methods.
Page 55: Others
4 Others 4.1 Protections IT-NC G3 / IT-NC G3 BLE series controllers have no battery reverse protection. Do not reverse the battery connection cables when wiring. Otherwise, the controller may WARNING be damaged. Protections Description When the actual charging current/power of the PV array exceeds its rated current/power, it will charge the battery as per the rated current/power.
Page 56 Protections Description When the temperature detected by the optional temperature sensor is lower than “LTCL (Low Temperature Charging Limit)” and “LTDL (Low Temperature Discharging Limit)”, the controller stops charging and Lithium battery low discharging automatically. When the detected temperature is higher than temperature charging the “LTCL”...
Page 57: Troubleshooting
For example, IT10420NC G3 48V system: 4.2 Troubleshooting Error Status Possible Reasons Troubleshooting Code Check whether the connected PV open circuit voltage is higher than the PV maximum open circuit voltage, and the PV Overvoltage alarm is cleared when the PV open circuit voltage is lower than the PV maximum open circuit voltage minus Check whether the PV connection...
Page 58 Error Status Possible Reasons Troubleshooting Code Disconnect the loads connection, and check whether the battery voltage is too Battery Under Voltage low. After the battery is charged and its Alarm (including voltage restored above “UVAR BATT (Under Voltage Alarm Recovery battery pack under indicator Voltage)”, it will automatically resume...
Page 59 Error Status Possible Reasons Troubleshooting Code Ensure the battery is installed in a cool and well-ventilated place, check that the battery actual charging and discharging current does not exceed the set values of "Battery Max Charging Current". (If BMS Battery Over is connected, “MCC”...
Page 60 Error Status Possible Reasons Troubleshooting Code BMS Over Current BOCD Discharging Alarm Check the BMS communication status or BMS Over Current BMS parameters settings. BOCC Charging Alarm BMS voltage and current limiting BMS is normal and no troubleshooting is parameters are required.
Page 61: Maintenance
4.3 Maintenance To maintain long-term working performance, it is recommended to have the following items inspected twice a year. Ensure the airflow around the inverter is not blocked, and remove dirt or debris from the heat sink.  Check whether the insulation of exposed cables have been damaged by sunlight, friction with other ...
Page 62: Specifications
5 Specifications Model IT5420NC G3 Electrical Parameters Battery Rated Voltage 12/24/48VDC or Auto Controller Operating Voltage Range 8–62V Battery Type AGM (Default) / Gel / Flooded / User Lithium Battery Type LiFePO4 / Li (NiCoMn)O2 / User Rated Charging/Discharging Current Rated charging power 650W/12V;...
Page 63 IT6415NC G3 Model IT6420NC G3 IT6415NC G3 BLE Electrical Parameters Battery Rated Voltage 12/24/48VDC or Auto Controller Operating Voltage Range 8–62V Battery Type AGM (Default) / Gel / Flooded / User Lithium Battery Type LiFePO4 / Li (NiCoMn)O2 / User Rated Charging/Discharging Current Rated Charging Power 780W/12V;...
Page 64 Model IT7415NC G3 IT7420NC G3 Electrical Parameters Battery Rated Voltage 12/24/48VDC or Auto Controller Operating Voltage Range 8–62V Battery Type AGM (Default) / Gel / Flooded / User Lithium Battery Type LiFePO4 / Li (NiCoMn)O2 / User Rated Charging/Discharging Current Rated Charging Power 975W/12V;...
Page 65 Model IT8420NC G3 Electrical Parameters Battery Rated Voltage 12/24/48VDC or Auto Controller Operating Voltage Range 8–62V Battery Type AGM (Default) / Gel / Flooded / User Lithium Battery Type LiFePO4 / Li (NiCoMn)O2 / User Rated Charging/Discharging Current Rated Charging Power 1,040W/12V;...
Page 66 IT10415NC G3 Model IT10420NC G3 IT10415NC G3 BLE Electrical Parameters Battery Rated Voltage 12/24/48VDC or Auto Controller Operating Voltage Range 8–62V Battery Type AGM (Default) / Gel / Flooded / User Lithium Battery Type LiFePO4 / Li (NiCoMn)O2 / User Rated Charging/Discharging Current 100A Rated Charging Power...
Page 67 Environmental Parameters Operating -25℃ to +60℃ (Derating when temperature is higher than 40℃) Temperature Range temperature -20℃ to +70℃ range Storage Temperature -30℃ to +70℃ Range Relative Humidity 5%–95% (N.C) Altitude < 5,000M (Derating when altitude is higher than 2,000m) Enclosure IP43 (Controller &...
Page 68: Appendixes
6 Appendixes Appendix 1 Dimensions (Unit: mm) IT5420NC G3: IP43 (Controller & White Terminal Cover)  IT5420NC G3: IP32 (Controller Only) ...
Page 69 IT6415NC G3 / IT6415NC G3 BLE / IT6420NC G3: IP43 (Controller & White Terminal Cover)  T6415NC G3 / IT6415NC G3 BLE / IT6420NC G3: IP32 (Controller Only) ...
Page 70 IT7415NC G3 / IT7420NC G3: IP43 (Controller & White Terminal Cover)  IT7415NC G3 / IT7420NC G3: IP32 (Controller Only) ...
Page 71 IT8420NC G3: IP43 (Controller & White Terminal Cover)  IT8420NC G3: IP32 (Controller Only) ...
Page 72 IT10415NC G3 / IT10415NC G3 BLE / IT10420NC G3: IP43 (Controller & White Terminal Cover)  IT10415NC G3 / IT10415NC G3 BLE / IT10420NC G3: IP32 (Controller Only) ...
Page 73: Appendix 2 Index Of Abbreviations
Appendix 2 Index of Abbreviations LCD Parameter Setting Abbreviations  Abbreviations Full Name Battery Type DSP Firmware Version ARM Firmware Version PMCC Parallel Maximum Charging Current Clear Accumulated Energy Com Port Enable PRCP PV Restart Charging Period Data Record Period Screen Cycle Time Screen Backlight Time Temperature Unit...
Page 74 Abbreviations Full Name Manual Equalize Charging LTDL Low Temperature Discharging Limit LTCL Low Temperature Charging Limit Lithium Battery Protection Discharging Protection SOC LBAS Low Battery Alarm SOC LBAR Low Battery Alarm Recovery SOC DPRS Discharging Protection Recovery SOC FCPR Full Charge Protection Recovery SO FCPS Full Charge Protection SOC Charging/Discharging Mode...
Page 75 Error Codes Abbreviations  Abbreviations Full Name PV Overvoltage PV Work Mode Error PV Reverse Polarity Protection PV Relay Error PV Power Low Battery Under Voltage Alarm (including battery pack under voltage alarm) Battery Over Voltage Protection Battery Over Discharging Protection Battery Over Temperature Battery Low Temperature Cell Over Voltage Protection...
Page 76 HUIZHOU EPEVER TECHNOLOGY CO., LTD. Tel: +86-752-3889706 E-mail: info@epever.com Website: www.epever.com...

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