Epever KR3522-1250P20 User Manual
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Epever KR3522-1250P20 User Manual

Inverter/charger
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KR3522-1250P20, KRP3522-1250P20
KR3542-0650P20, KRP3542-0650P20
KR5542-1050P20, KRP5542-1050P20
Inverter/charger
User Manual

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Summary of Contents for Epever KR3522-1250P20

  • Page 1 Inverter/charger User Manual KR3522-1250P20, KRP3522-1250P20 KR3542-0650P20, KRP3542-0650P20 KR5542-1050P20, KRP5542-1050P20...

  • Page 2: Table Of Contents

    Contents Important Safety Instructions..............1 Disclaimers....................5 1 General Information.................6 1.1 Overview............................6 1.2 Appearance...........................9 1.3 Naming rules..........................12 1.4 Connection diagram......................... 13 2 Interface....................15 2.1 Indicator............................15 2.2 Buttons............................16 2.3 Home screen..........................17 2.4 Interface............................18 2.4.1 Real-time data interface....................18 2.4.2 User interface........................
  • Page 3 3.3 Mounting the inverter/charger....................53 3.4 Wiring the inverter/charger.....................54 3.5 Operate the inverter/charger....................64 4 Working modes..................66 4.1 Abbreviation..........................66 4.2 Battery mode..........................66 4.2.1 Scenario A: Both PV and Utility are not available............66 4.2.2 Scenario B: PV is available, but the Utility is not available........67 4.2.3 Scenario C: Both PV and Utility are available..............68 4.2.4 Scenario D: The PV is not available, but the Utility is available........

  • Page 4: Important Safety Instructions

    Important Safety Instructions Please reserve this manual for future review. This manual contains all the safety, installation, and operation instructions for the KR/KRP series inverter/charger ("inverter/charger" referred to as this manual). 1. Explanation of symbols To enable users to use the product efficiently and ensure personal and property safety, please read the related words carefully when you encounter the following symbols in the manual.
  • Page 5 4. Safety cautions before installation When receiving the inverter/charger, please check if there is any damage in transportation. If you find any problem, please contact the transportation company or CAUTION our company in time.  When installing or moving the inverter/charger, follow the instructions in the manual.
  • Page 6 7. Safety cautions for inverter/charger operation When the inverter/charger works, the shell will generate much heat, and the WARNING temperature is very high. Please do not touch it, and keep it far from the equipment susceptible to high temperature. SURFACE ...
  • Page 7 Improper maintenance of the inverter/charger may cause personal injury or equipment damage;  It is recommended to wear an antistatic wrist strap or avoid unnecessary contact with the circuit  board. The safety mark, warning label, and nameplate on the inverter/charger should be visible, not removed or covered.

  • Page 8: Disclaimers

    Disclaimers The warranty does not apply to the following conditions: Damage caused by improper use or inappropriate environment (it is forbidden to install the  inverter/charger in humid, salt spray, corrosion, greasy, flammable, explosive, dust accumulative, or other severe environments). The actual current/voltage/power exceeds the limit value of the inverter/charger.

  • Page 9: General Information

    1 General Information 1.1 Overview KR/KRP series, upgraded off-Grid inverter/chargers that support utility charging, oil generator charging, solar charging, utility output, inverter output, and energy management. Equipped with main AC output and second AC output. After enabling the low-power mode on the LCD, the inverter/charger can enter the low-power mode according to the battery voltage and output power.
  • Page 10 where the electricity is unstable. Features  Full intelligent digital energy storage equipment.  Applicable for pure off grid/ backup power / self-generation and self-consumption.  Support battery mode or non-battery mode.  Non-battery mode: simultaneously charging with solar (Main) and Utility (Assist). ...
  • Page 11 ①More than 12 units need to be customized (Dust removal is required regularly, and the specific requirements are detailed in chapter 7 Maintenance). ②Only the KR5542-1050P20 and KRP5542-1050P20 support two PV input function, which realizes single MPPT tracking or two parallel MPPTs tracking, and increase the PV maximum input current. When two PV arrays are independently input, set the "PV mode"...

  • Page 12: Appearance

    1.2 Appearance KR3522-1250P20/KRP3522-1250P20/KR3542-0650P20/KRP3542-0650P20 ...
  • Page 13 KR5542-1050P20/KRP5542-1050P20 ...
  • Page 14 RS485-A RS485-B RS485-B Please go to EPEVER official website to check or download the currently supported BMS manufacturers and the BMS parameters. (2) Dry contact specification: 1A@125VAC. Function: The dry contact interface is connected with the generator switch to turn on/off the generator.

  • Page 15: Naming Rules

    Definition Definition HFS-BUS CAN-L PFS-BUS CAN-H PS-GND 6/7/8/9 Reserved 1.3 Naming rules Naming rules for KR series  Naming rules for KRP series ...

  • Page 16: Connection Diagram

    1.4 Connection diagram No battery mode ...
  • Page 17 Battery mode  AC loads shall be determined according to the output power of the inverter/charger. WARNING The load exceeding the maximum output power may damage the inverter/charger.  For different battery types, confirm the relevant parameters before power on. ...

  • Page 18: Interface

    2 Interface Note: The display screen can be viewed clearly when the angle between the end-user's horizontal sight and the display screen is within 90°. If the angle exceeds 90°, the information on the display screen cannot be viewed clearly. 2.1 Indicator Indicator Status...

  • Page 19: Buttons

    2.2 Buttons Buttons Operation Instruction  Exit the current interface. Click  Switch from the "home screen" to the "Main Table Data Information" screen.  Browse interface: Up/Down. Click  Parameters setting interface: Increase or decrease the parameter value per step size. Parameters setting interface: Increase or decrease Press and hold the parameter value per 10 times the step size.

  • Page 20: Home Screen

    2.3 Home screen Instruction ❶ Display the system time, current battery type, and charging stage. When the BMS communication is normal, the icon will be shown on the far right, while when it is abnormal, the icon will be shown on the same position. ❷...

  • Page 21: Interface

    Battery voltage / battery current / lithium battery real-time SOC (display "--" without lithium battery) ❼ Parallel status icon. It shows when there is two or more inverter/chargers connect in parallel successfully, and it will not display on the single inverter/charger. ★...

  • Page 23: User Interface

    2.4.2 User interface After powering on the inverter/charger, the home screen shows up. Click the "ESC" button to enter the "Main Table Data Information" screen. Click the "ENTER" button to enter the next interface, or click the "UP/DOWN" button to browse the current screen display. "User Data Setup"...

  • Page 24: Administrator Interface

    password. The default parameters and setting range refer to chapter 2.5.1 Parameters list. 2.4.3 Administrator interface After powering on the inverter/charger, the home screen shows up. Press and hold the "ENTER" button to enter the password interface. Input the password correctly (0000 by default) to check all parameters or modify them.

  • Page 25: Parameters Setting

    2.5 Parameters setting 2.5.1 Parameters list Enter the "Set Data Navigation" interface according to chapter 2.4.3 Administrator interface. Then click the "UP/DOWN" button to select navigation 1－9 for detail settings. Default parameters and setting ranges are shown in the following table. Note: On the parameter setting interface, click the "UP/DOWN"...
  • Page 26 Parameters Default User define User define: DISABLE, ENABLE Note: The parameter will only take effect when UnbalanceSet (Current DISABLE used in three phase. After restoring to factory unbalance set) settings, the default value is the last modified value. User define：Single, Phase A, Phase B, Phase C Note: After phase set is changed, must turn off the inverter charger for 10 seconds before Phase Set...
  • Page 27 100.0A charging current) Namely, the maximum current at the battery end when the utility charges the battery. User define: 5.0A to 110.0A for KR3522-1250P20/ KRP3522-1250P20, step size: 0.1A 110.0A Namely, the maximum current at the battery end when the utility charges the battery.
  • Page 28 100.0A KRP5542-1050P20, step size: 0.1A. Namely, the Max. charging current) maximum allowable charge current on battery side. User define: 5.0A to 120.0A for KR3522-1250P20/ 120.0A KRP3522-1250P20, step size: 0.1A. Namely, the maximum allowable charge current on battery side. User define: 10.0A to 175.0A for KR3542-0650P20/ KRP3542-0650P20, step size: 0.1A.
  • Page 29 Parameters Default User define User define: VOLT, SOC VOLT: The battery voltage control parameters take effect after setting this value as “VOLT.” SOC: The SOC parameters take effect after setting ChargeControlMode (Battery VOLT this value as “SOC.” charge control mode) (Voltage) Note: If "SOC"...
  • Page 30 Parameters Default User define It takes effect after the “ChargeControlMode” is set as “SOC.” LwEgyDnctRecvrSoc (Low User define: (Under energy alarm Soc plus 5%) to energy disconnect recover 60%, or 20% to 60%, step size: 1% Soc) Note: Take the maximum value between (Under energy alarm Soc plus 5%) and 20%.
  • Page 31 Parameters Default User define User define: OFF, ON This parameter is for manual equalizing charging. When set to "ON", the inverter/charger enters the manual equalizing charging working mode. After the Manual Equalize inverter/charger restarts, the default value is restored to "OFF," indicating that the inverter/charger is charged periodically according to the set equalization charging cycle.
  • Page 32 Parameters Default User define User define: Normal, Standby When set as "Standby," the inverter charger will enter standby mode and the AC output will be stopped. After Stand By Mode Normal modifying parameter restarting inverter/charger, the parameter will be restored to the default value (the previous modified value will not be saved).
  • Page 33 Parameters Default User define User define: CLOSE, OPEN. Open or close the loads. This parameter and the load output switch are of the same control. To change the state of either of them, the other will be changed too. Load Open/Close OPEN After modifying the parameter and restarting the inverter/charger, the parameter will be restored to the...
  • Page 34 Parameters Default User define User define: Shared, Independent This parameter takes effect when inverter/chargers are connected in parallel. If each inverter/charger is connected to the same battery BATT Input Mode Shared pack, this value needs to be set to "Shared" mode. If each inverter/charger is connected to a separate battery pack, this value needs to be set to "Independent"...
  • Page 35 Parameters Default User define User define: 1 second to 3600 seconds, step size: 1 second (Note: When setting this value, press and hold the "UP/DOWN" button to increase/decrease the value by 100*step size, namely, 100 seconds.) Log Data Interval 60 Sec Set the time interval of the historical data (only refers to the voltage, current and other data stored regularly, excluding the historical faults.
  • Page 36 Parameters Default User define Press the ENTER button to clear the voltage, current and other data stored regularly, excluding the historical faults. Log Data Reset Note: After pressing the ENTER button, the flashing LED light will become steady or turn off, then inverter/charger will...
  • Page 37 Parameters Default User define User define: ENABLE, DISABLE Under the normal BMS communication, if the ManualChageEnable (Manual "ManualChageEnable" is set to "ENABLE," the ENABLE charge enable) lithium battery charging allowed. "ManualChageEnable" is set to "DISABLE," the lithium battery charging is not allowed. 7.
  • Page 38 Parameters Default User define 48V battery type: AGM, OPZS, GEL, FLD, LFP15S, LFP16S, LNCM13S, LNCM14S Battery Type 24V battery type: AGM, OPZS, GEL, FLD, LFP8S, LNCM6S, LNCM7S 64.0V User define: Charging limit voltage< Over voltage (48V system) OverVoltDiscnect (Over voltage disconnect voltage≤...

  • Page 39: Battery Work Modes

    Parameters Default User define User define: Discharging limit voltage≤ Under voltage warning voltage< (Under voltage warning recover 48.0V (48V system) voltage minus 0.1*N), step size: 0.1V Note: N=Rated UnderVolt Warn (Under voltage battery voltage/12. Note: This voltage is also the disconnect voltage warning voltage) for the AC output main power-off.
  • Page 40 1. Lithium battery pack with The inverter/charger controls Figure “Setting BMS, without current charging and discharging process for lithium battery control function at the end based on the pre-set MAP pack with BMS, without of charge and discharge table. current control function” 2.
  • Page 41 Figure 2 “Setting process for lithium battery pack with BMS and current control function”  When the system adopts a lithium battery pack with BMS and current control function at the end of charge and discharge, and the lithium battery pack can communicate with the inverter/charger normally, follow the flowchart below to set parameters correctly.
  • Page 42 The inverter/charger controls charging and discharging based on the read BMS values. Please go to EPEVER official website to download the currently supported BMS manufacturers and the BMS parameters. The inverter/charger will control charging and discharging based on the LCD ...
  • Page 43 Due to the different charging and discharging characteristics and voltage  consistency of lithium batteries from different manufacturers, it is necessary for professionals to guide the use of VIRTUAL_BMS for charging and discharging. Figure 3 “Setting process for lithium battery pack with BMS, without current control ...
  • Page 45 The inverter/charger will control charging and discharging based on the LCD  settings after setting the “BMSCurent Select” as “INVALID.” Due to the different charging and discharging characteristics and voltage  consistency of lithium batteries from different manufacturers, it is necessary for professionals to guide the use of VIRTUAL_BMS for charging and discharging.
  • Page 46 The inverter/charger will control charging and discharging based on the LCD  settings after setting the “BMSCurent Select” as “INVALID.” Due to the different charging and discharging characteristics and voltage  consistency of lithium batteries from different manufacturers, it is necessary for professionals to guide the use of VIRTUAL_BMS for charging and discharging.

  • Page 47: Battery Voltage Control Parameters (Smart)

    20.4－32V Low Voltage Disconnect Voltage 20.3V 20.3V 20.3V 20.3V Read-only Discharging Limit Voltage When the battery voltage is lower than 21.6V, the battery inverter output must be derated. Curve of Continuous output power Vs battery voltage for KR3522-1250P20/KRP3522-1250P20 as below:...
  • Page 48 The parameters are measured in the condition of 48V/25 ºC. Battery Type OPZS User define Voltage control parameters 64.0V 64.0V 64.0V 64.0V 42.8－64V Over Voltage Disconnect Voltage 60.0V 60.0V 60.0V 60.0V 42.8－64V Charging limit voltage 60.0V 60.0V 60.0V 60.0V 42.8－64V Over Voltage Reconnect Voltage 58.4V 58.4V...
  • Page 49 The following rules must be obeyed when setting the Lead-acid battery voltage control parameters. A． Over Voltage Disconnect Voltage > Charging Limit Voltage ≥ Equalize Charging Voltage ≥ Boost Charging Voltage ≥ Float Charging Voltage > Boost Voltage Reconnect Voltage B．...
  • Page 50 Voltage Under Voltage Warning Voltage 24.8V 21.5－32V 46.5V 49.6V 42.8－64V Low Voltage Disconnect Voltage 23.2V 21.5－32V 43.5V 46.4V 42.8－64V Discharging Limit Voltage 22.0V Read-only 41.2V 44.0V Read-only Battery Type LNCM 24V system Voltage control parameters LNCM6S LNCM7S User Define Over Voltage Disconnect Voltage 25.8V 30.1V 21.5－32V...

  • Page 51: Time Setting

    Over Voltage Disconnect Voltage < Over Charging Protection Voltage (BMS Circuit Protection Modules)-0.2V Over Voltage Disconnect Voltage > Charging Limit Voltage ≥ Equalize Charging Voltage ≥ Boost Charging Voltage ≥ Float Charging Voltage > Boost Voltage Reconnect Voltage Over Voltage Disconnect Voltage > Over Voltage Reconnect Voltage Boost Voltage Reconnect Voltage >...

  • Page 52: Password Modifying

    2.5.6 Password modifying Enter the "Set Data Navigation" interface according to chapter 2.4.3 Administrator interface. Then click the "UP/DOWN" button to select "8 PassWord Setup", and click the "ENTER" button to enter the password modifying interface. Click the "ENTER" button to move right, click the "AC OUT"...

  • Page 53: Single Installation

    3 Single Installation 3.1 Attention  Please read the manual carefully to familiarize yourself with the installation steps. Be very careful when installing the batteries, especially flooded lead-acid batteries. Please wear eye  protection, and have fresh water available to rinse if contact with battery acid. ...

  • Page 54: Wire And Breaker Size

    PV module's Isc. The PV array's Isc must not exceed the maximum PV input current. For max. PV input current and max. PV wire size, please refer to the table below: Model PV wire size Circuit breaker KR3522-1250P20 /11AWG 2P—20A (with arc extinguishing function) KR3542-0650P20 KRP3522-1250P20 /10AWG 2P—25A (with arc extinguishing function)
  • Page 55 440V (At 25℃). Recommended Utility wire size  Model Utility wire size Circuit breaker KR3522-1250P20 KR3542-0650P20 /10AWG 2P—32A KRP3522-1250P20 KRP3542-0650P20 KR5542-1050P20 10mm /7AWG 2P—50A KRP5542-1050P20 The utility input has the circuit breaker already; no need to add any more.

  • Page 56: Mounting The Inverter/Charger

    3.3 Mounting the inverter/charger Risk of explosion! Never install the inverter/charger in a sealed enclosure with flooded batteries! Do not install the inverter/charger in a confined area where the battery gas WARNING can accumulate. The inverter/charger can be fixed to the concrete and solid brick walls, while it cannot be fixed to the hollow brick wall.

  • Page 57: Wiring The Inverter/Charger

    ❺Utility or Generator > ❻Optional accessories”, and disconnect the inverter/charger in the reverse > order. The following wiring sequence is illustrated in the appearance of "KR3522-1250P20/ KRP3522-1250P20/KR3542-0650P20/KRP3542-0650P20." For wiring positions of other models, please refer to the actual product appearance.
  • Page 58 No battery mode ...
  • Page 59 Battery mode  Grounding The inverter/charger has a dedicated grounding terminal, which must be grounded reliably. The grounding wire size must be consistent with the recommended load wire size. The grounding connection point shall be as close as possible to the inverter/charger, and the total grounding wire shall be as short as possible.
  • Page 60  Do not ground the AC input L or N terminals between the inverter/charger and the household power distribution cabinet.  Do not ground the AC output L or N terminals.   The cabinet of the inverter/charger is connected to earth through the earth Grounding rail, along with the AC input and output's PE (Protective Earth) terminal.
  • Page 61 Connect the AC load  Risk of electric shock! When wiring the AC load, please disconnect the circuit breaker and ensure that the poles' leads are connected correctly.  The AC loads shall be determined by the continuous output power of the inverter/charger.
  • Page 62 Control logic for main and second power off of AC output  When the battery voltage is lower than the "Under Voltage Warning Voltage," the AC output main power-off relay will be disconnected after a 5-second delay. Once the battery voltage rises above the "Low Voltage Reconnect Voltage,"...
  • Page 63 AC OUTPUT (MAIN) connection  AC OUTPUT (SECOND) connection ...
  • Page 64 Connect the PV modules  Risk of electric shock! The PV array can generate dangerous high-voltage! Disconnect the circuit breaker before wiring, and ensure that the leads of "+" and "-" poles are connected correctly. WARNING  It is forbidden to connect the positive and negative poles of the PV with the ground; otherwise, the inverter/charger will be damaged.
  • Page 65 Connect the Utility or generator  Risk of electric shock! The Utility input can generate dangerous high-voltage! Disconnect the circuit breaker or fast-acting fuse before wiring, and ensure that the poles' leads are connected correctly.  After the Utility is connected, the PV and battery cannot be grounded. In contrast, WARNING the inverter/charger cover must be grounded reliably (to shield the outside electromagnetic interference effectively and prevent the cover from causing...
  • Page 66 Dry contact interface: Function：  The dry contact interface can turn on/off the generator and is connected parallel with the generator's switch. Working principle:  When the battery voltage reaches the Dry Contact ON Voltage, the dry contact is connected. Its coil is energized.

  • Page 67: Operate The Inverter/Charger

    Note: For the specific communication modules supported, please refer to the accessories list file. 3.5 Operate the inverter/charger Step 1: Double-check whether the wire connection is correct. Step 2: Connect the battery circuit breaker. Step 3: Turn on the power switch. The LCD will be lit, which means the system running is normal. Power switch ...
  • Page 68 and no safety hazard exists. Step 4: Set parameters by the buttons. For detailed parameters setting, refer to chapter 2.5 Parameters setting. CAUTION Step 5：Use the inverter/charger. Connect the load circuit breaker, the PV array circuit breaker, and plug the utility's socket in sequence. After the AC output is normal, turn on the AC loads one by one.

  • Page 69: Working Modes

    4 Working modes 4.1 Abbreviation Abbreviation Instruction PV power Load power LOAD Battery voltage Low Voltage Disconnect Voltage Low Voltage Reconnect Voltage Low Energy Disconnect SOC Low Energy Disconnect Recover SOC Auxiliary module OFF voltage (namely, Utility charging OFF voltage) Auxiliary module ON voltage (namely, Utility charging ON voltage) Utility Charging OFF SOC Utility Charging ON SOC...

  • Page 70: Scenario B: Pv Is Available, But The Utility Is Not Available

    ❷Any of the following is satisfied, the battery stops supplying the load.  The battery voltage is lower than or equal to the LVD value.  The battery SOC is lower than or equal to the LED value.  Set the "Charge Control Mode" as "VOLT," the working mode is determined by the battery voltage value.

  • Page 71: Scenario C: Both Pv And Utility Are Available

    Note: When the battery voltage is greater than or equal to the LVR value, or ❷ the battery SOC is greater than or equal to the LER value, the working mode returns to state 4.2.3 Scenario C: Both PV and Utility are available. Discharging Mode: "PV>BP>BT"...
  • Page 72 Charging Mode: "Solar" Discharging Mode: "BP>PV>BT" The Utility supplies power to the load, and the （C-2） PV charges the battery only.   Utility Discharging Mode: "PV>BP>BT" Charging Mode: "Solar prior" ❶ When the PV power is greater than the load "PV>BT>BP"...
  • Page 73 Charging Mode: "Solar prior" Discharging Mode: "BP>PV>BT" ❶ When the PV power is greater than the (MCC*V ), the Utility and PV supply power to the load, and the PV charges the battery at the same time. > MCC*V ≤ MCC*V ❷...

  • Page 74: Scenario D: The Pv Is Not Available, But The Utility Is Available

    ❷ When the PV power is lower than or equal to the (MCC*V ), the Utility and PV charge the battery, and the Utility supplies power to the load. Discharging Mode: No impact under any Charging Mode: "Utltyprior" mode （C-6） ...
  • Page 75 ❶Any of the following is satisfied, the battery Charging Mode: "Solar prior" Discharging Mode: "PV>BT>BP" supplies the load.  The battery voltage is higher than or equal to the AOF value.  The battery SOC is greater than or equal to （D-3）...

  • Page 76: No Battery Mode

    Charging Mode: "Utly & solr" Discharging Mode: No impact under any mode or "Utltyprior" （D-5）  The Utility supplies power to the load and charges  Utility the battery simultaneously. 4.3 No battery mode Note: Under the no battery mode, the "Charging Mode" and "Discharging Mode" settings will not take effect.

  • Page 77: Protections

    5 Protections Protections Instruction When the PV array's actual charging current/power exceeds its rated current/power, it will charge the battery as per the rated current/power. When the PV voltage exceeds the bus voltage, the PV input power is constrained PV limit Current/Power by the load power, charging power, the power that the solar panels can deliver, and the current of the PV circuit breaker.
  • Page 78 When the internal temperature overheats, the inverter/charger will stop charging/discharging. Device overheating The inverter/charger will resume charging/discharging when the internal temperature is normal and the protection time lasts more than 20 minutes. KR3522-1250P20 3605W≤P˂4550W 4550W≤P˂5250W 5250W≤P˂7000W P≥7000W...
  • Page 79 Protections Instruction 5350W≤P˂6295W 6295W≤P˂6995W 6995W≤P˂8500W P≥8500W KR3522-1250P20 KR3542-0650P20 Protect after 30 seconds Protect after 10 seconds Protect after 5 seconds Protect immediately KRP3522-1250P20 KRP3542-0650P20 Note: The output is recovered automatically after a delay time of 5s, 10s, and 15s separately. The Utility bypass overload inverter/charger stops working after the 4th protection and can resume working after resetting or restarting.

  • Page 80: Troubleshooting

    6 Troubleshooting After the inverter/charger is powered on, the meter displays the boot screen all the time (unable to enter the home screen) and the red "RUN" indicator flashes. It means the communication with the inverter/charger is error. When the above fault occurs, check whether the CAUTION communication cable is disconnected.

  • Page 81: Pv Faults

    Error ① Fault/Status Indicator Buzzer Solution code Check that the battery actual charging and discharging current does not BAT OCP (Battery over Err37 exceed the setting values of "Battery Max. charging current " and current protection) "Battery limit discharging current." BAT DROP (Battery Check whether the battery connection is normal, and whether the BMS Err39...
  • Page 82 Error ① ② Fault/Status Indicator Buzzer Solution code PV2 OVP (PV2 over Intermitte Check if the PV open-circuit voltage is too high (greater than 500 V). Err18 indicator voltage protection) nt beeps The alarm is released when the PV open-circuit voltage is below 480 V. red on PV2 OCP (PV2 over Err20...

  • Page 83: Inverter Faults

    6.3 Inverter faults Error ① ② Fault/Status Indicator Buzzer Solution code Check if the load actual power exceeds the rated power (namely, the inverter/charger’s continuous output power), disconnect the load INV OCP (Inverter over Err2 completely and turn off the inverter/charger. Wait 5 minutes and then current protection) LOAD Intermitte...
  • Page 84 Error ① ② Fault/Status Indicator Buzzer Solution code INV CURR OFFSET ERR Disconnect the load completely and turn off the inverter/charger. Wait 5 (Inverter current offset Err35 minutes and then turn on the inverter/charger to check if it resumes error) normal.

  • Page 85: Utility Faults

    6.4 Utility faults Error ① ② Fault/Status Indicator Buzzer Solution code Check if the utility voltage exceeds the "Utility Over Voltage Disconnect Voltage," then disconnect the AC input and turn off the AC OVP (AC over voltage GRID indicator Intermittent Err8 inverter/charger.

  • Page 86: Load Faults

    ①The fault/status code is displayed in the "Status" column at the bottom right corner of the LCD. When multiple faults occur simultaneously, the LCD only displays the fault code with the smallest value. ②Set the "BuzzerAlert" as "ON," the buzzer will sound when a fault occurs. After the fault is eliminated, the buzzer will automatically mute. If the "BuzzerAlert"...

  • Page 87: Other Faults For Single Inverter/Charger

    6.6 Other faults for single inverter/charger Error ① Fault/Status Indicator Buzzer Solution code BUS OVP (DC bus over Err0 Turn off the inverter/charger. Wait 5 minutes and then turn on the voltage protection) inverter/charger to check if it resumes normal. If it is still abnormal, BUS UVP (DC bus under Err6 please contact our technical support.

  • Page 88: Bms Faults

    Error ① Fault/Status Indicator Buzzer Solution code LIMITCHG (Low temperature limit Err46 charging) Check whether the ambient temperature is lower than the set "Charge LIMITDISCHG (Low low temperature limit" and "Discharge low temperature limit." temperature limit Err47 discharging) Turn off the inverter/charger. Wait 5 minutes and then turn on the EEP ERR (EEPROM Err54 inverter/charger to check if it resumes normal.

  • Page 89: Maintenance

    7 Maintenance To prevent frequent over-heat protection of the inverter/charger, which may affect system reliability, it is recommended to clean the anti-dust kit once a month. In environments with high temperatures and severe dust pollution, it is advisable to clean the anti-dust kit every two weeks.

  • Page 90: Specifications

    8 Specifications 8.1 KR Series Model KR3542-0650P20 KR5542-1050P20 Utility input 176VAC to 264VAC (Default) Utility Input Voltage 90VAC to 285VAC (Configurable) Utility Input Frequency 45Hz to 65Hz Maximum Utility Charging 100A Current Switch Response Time – Inverter to Utility: 10ms Switch Response Time Switch Response Time –...
  • Page 91 512mm × 245mm 568mm × 245mm Mounting hole size Φ9mm/Φ10mm Φ9mm/Φ10mm Net Weight 12.7Kg 15.5Kg Model KR3522-1250P20 Utility input 176VAC to 264VAC (Default) Utility Input Voltage 90VAC to 285VAC (Configurable) Utility Input Frequency 45Hz to 65Hz Maximum Utility Charging 110A Current Switch Response Time –...
  • Page 92 Inverter Rated Power (@30℃) 3500W 3-second Transient Surge Output 7000W Power Inverter Output Voltage 220/230VAC±3% Inverter Frequency 50/60Hz±0.2% Output Voltage Waveform Pure sine wave Load Power Factor 0.2－1(VA ≤ Rated output power) THDu (Total Harmonic Voltage ≤3% (24V resistive load) Distortion) Maximum Load Efficiency Maximum Inverter Efficiency...

  • Page 93: Krp Series

    Parallel Function Yes, 12 units in standard, 16 units at most -20℃ to +50℃ (When the environment temperature exceeds Work Temperature Range 30℃, the actual output power is reduced appropriately) Storage Temperature Range -25℃ to +60℃ Enclosure IP20 (With ANTI-DUST KIT) Relative Humidity <...
  • Page 94 Main Output Cut-Off Voltage Equal to “Under Voltage Warning Voltage” Second Output Cut-Off Voltage Equal to “Low Voltage Disconnect Voltage” Dual Output Recovery Voltage Equal to “Low Voltage Reconnect Voltage” Solar controller Maximum Open-circuit 500V (At minimum operating environment temperature) Voltage 440V (At 25℃) MPPT Voltage Range...
  • Page 95 Mounting hole size Φ9mm/Φ10mm Φ9mm/Φ10mm Net Weight 12.7Kg 15.5Kg Model KRP3522-1250P20 Utility input 176VAC to 264VAC (Default) Utility Input Voltage 90VAC to 285VAC (Configurable) Utility Input Frequency 45Hz to 65Hz Maximum Utility Charging 110A Current Switch Response Time – Inverter to Utility: 10ms Switch Response Time Switch Response Time –...
  • Page 96 Battery Battery Rated Voltage 24VDC Battery Work Voltage Range 20.4VDC to 32.0VDC Battery Maximum Charging 120A Current Others ≤1.5A No-load Losses Test condition: Utility, PV and Load are disconnected, AC output is ON, fan stops, @24V input ≤1.1A Standby Current Test condition: Utility, PV and Load are disconnected, AC output is OFF, fan stops, @24V input Communication with BMS...

  • Page 97: Dimensions

    9 Dimensions Model: KR3522-1250P20/KRP3522-1250P20 (Unit: mm)
  • Page 98 Model: KR3542-0650P20/KRP3542-0650P20 (Unit: mm)
  • Page 99 Model: KR5542-1050P20/KRP5542-1050P20 (Unit: mm) Any changes without prior notice! Version number: V1.0...
  • Page 100 HUIZHOU EPEVER TECHNOLOGY CO., LTD. Tel: +86-752-3889706 E-mail: info@epever.com Website: www.epever.com...

This manual is also suitable for:

Krp3522-1250p20Kr3542-0650p20Krp3542-0650p20Kr5542-1050p20Krp5542-1050p20

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