MAXHUB HN3KS-AH2 User Manual

Single phase hybrid solar inverter

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Single Phase Hybrid Solar Inverter

HN3KS-AH2 / HN3K6S-AH2 / HN4KS-AH2 / HN5KS-AH2 / HN6KS-AH2

User Manual

V1.0

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Summary of Contents for MAXHUB HN3KS-AH2

Page 1 Single Phase Hybrid Solar Inverter HN3KS-AH2 / HN3K6S-AH2 / HN4KS-AH2 / HN5KS-AH2 / HN6KS-AH2 User Manual V1.0...
Page 2 Table Of Contents Foreword About Manual Labels in Documentation Labels on Inverter 1. Safety Instructions 1.1 General Requirements 1.2 Unpacking Safety 1.3 Storage Safety 1.4 Carry Safety 1.5 Installation Safety 1.6 Electrical Connection Safety 1.7 Operation Safety 1.8 Disassembly Safety 1.9 Maintenance Safety 1.10 Disposal Safety 2.
Page 3 5.1 Safety During Mounting 5.2 Location Requirements 5.2.1 Environment Requirements 5.2.2 Carrier Requirements 5.2.3 Angle Requirements 5.2.4 Clearance Requirements 5.2.5 Installation Tools 5.3 Installation 5.3.1 Moving Inverter 5.3.2 Mounting-bracket 5.3.3 Installing Inverter Electrical Connection 6.1 Safety Instructions 6.2 Electrical Connection Overview 6.3 External Protective Grounding Connection 6.4 Grid Connection 6.4.1 AC Side Requirements...
Page 4 Foreword About Manual Before operating the inverter, be sure to read this manual and other related documents carefully. All documents must be taken care of and made readily available. Due to changes in product development, the contents of this manual may be updated or revised periodically without prior notice. Labels in Documentation Label Description...
Page 5 WARNING • It is strictly prohibited to operate products and cables (including but not limited to handling, installing, operating products and cables, supplying power to products, maintaining and working at altitude, etc.) under severe weather conditions such as flood, lightning, rain, snow and strong winds above level 6.
Page 6 1.5 Installation Safety CAUTION • Ensure that the installation environment is well ventilated. Do not place the device in an environment that is flammable, explosive, toxic or smoky. • Before installation, make sure the product does not have any electrical connections. If drilling holes is required during installation, ensure that water and electricity cables in the wall are avoided.
Page 7 DANGER When the product is working properly, please note the following: • Do not touch the product enclosure and any heating parts of the inverter (such as the radiator). Otherwise, there may be a risk of burns. • It is strictly forbidden to plug and unplug any connector on the inverter. •...
Page 8 1.10 Disposal Safety When the inverter service life expires, please scrap the inverter according to the relevant local regulations and standards to avoid property damage or casualties. 2.Product Description 2.1 Product Brief Introduction 2.1.1 Function Overview The inverter is a single-phase hybrid inverter. The inverter is designed to convert the direct current power generated from the PV modules or batteries into grid-compatible AC current and feeds the AC current to the utility grid.
Page 9 2.1.4 Size and Weight Figure 2.3 Inverter size The following figure shows the dimensions of the inverter. Table 2.2 The dimensions of the inverter Inverter Model A(mm) B (mm) C (mm) Weight(kg) HN3KS-AH2 23.5 HN3K6S-AH2 23.5 HN4KS-AH2 23.5 HN5KS-AH2 HN6KS-AH2...
Page 10 2.1.5 Supported Power Grid Types This series inverter supports the following power grid types: TN-S and TT. In the TT power grid, the N-to-PE voltage must be less than 30 V. 2.2 LED Indicator The inverter has three different colors LED indicator to indicate the current running state. Figure 2.4 LED indicator Table 2.3 LED indicator explanation Indicator...
Page 11 2.3 Display and Button Description The inverter has a display screen and four touch buttons used to display running state and set the parameters of the inverter. Figure 2.5 Display and button Table 2.4 Display and button description Function key Describe Screen Display configured information and running state...
Page 12 Table 2.5 Terminal Description Decisive-Voltage Name Description Classification BAT+, BAT- Connectors for the battery power cables. DVC-A PV1+,PV1-, Terminals for PV input. DVC-C PV2+,PV2- DC SWITCH Switch on/off the input of the PV. DVC-C Communication port for BMS, Meter/Grid Current, DRM, DVC-A AFCI, DRY IO, PARA1, PARA2.
Page 13 3.2.2 Power Derating Power derating is a method of protecting inverters from device damage due to overheating. Continuous increase in environmental temperature and module temperature can both result in power reduction. 3.2.3 Anti-islanding Protection Inverters can quickly monitor and disconnect from the grid in the event of grid voltage loss or disconnection. They also emit an alarm signal to avoid safety hazards for the user's equipment and maintenance personnel.
Page 14 3.3.2 Discharge Management The maximum permissible discharge current is limited to the smaller of the following values: • Maximum discharge current of the inverter (Depends on the inverter model). • The maximum/recommended discharge current provided by the battery manufacturer. As a result, the battery discharge power may not reach the rated power of the inverter. 3.4 Generator Control (optional) Generator control replaces the ATS device of the generator, realizing the automatic switching of the generator's switch (The generator should support the communication with inverter).
Page 15 Table 3.1 Components Item. Description. Note. Inverter Hybrid inverter. Perfectly compatible with most types of solar panels in the market, including Solar panels the model use 166mm/182mm/210mm solar battery cell. Start and shut down the generator automatically based on conditions without Generator (optional) external ATS (Automatic Transfer Switch).
Page 16 Figure 3.2 Self-use energy flow diagram...
Page 17 3.5.3 Peak Shift Mode The Peak Shift mode can only be selected if it complies with local laws and regulations, such as allowing the battery to sell electricity to the grid. It is recommended to use the Peak Shift mode in scenarios where there is a significant difference in electricity prices between peak and off-peak periods.
Page 18 Figure 3.3 Peak Shift mode energy flow diagram 3.5.4 Battery Priority Mode The battery priority mode is primarily suitable for scenarios where the grid is unstable and there are critical loads. When the grid is available, the system ensures that the battery is fully charged to ensure that the loads can be powered by the battery when the grid is disconnected.
Page 19 Table 3.4 Battery priority mode description A3 (P ≥P Load PV can supply power to both the load, battery and grid. The priority of power supply is as follows: aLoad; bBattery; cGrid. If the PV energy is not enough to charge the battery, electricity can be drawn from the grid to charge the battery.
Page 20 3.5.5 Scheduled Charge and Discharge Mode Inverter controls the charging and discharging process of the battery based on the user-set schedule. This mode ensures that the battery has sufficient power when the user needs electricity, while avoiding overcharging and over discharging issues that may occur when the battery is in charging or discharging state for a long time. It optimizes the battery usage and extends the battery lifespan.
Page 21 NOTICE • After enabling PV emergency mode, due to the stability issues of PV energy caused by weather and sunlight, it is recommended to connect low-power loads, such as lighting and TV. It is not recommended to use high-power devices with high requirements for the stability of PV energy, such as desktop computers and air conditioners, to prevent the inverter from shutting down due to PV energy fluctuations, which may result in data loss.
Page 22 5.Mechanical Mounting 5.1 Safety During Mounting DANGER • Make sure there is no electrical connection before installation. • Before drilling, avoid the water and electricity wiring in the wall. WARNING Respect all local standards and requirements during mechanical installation. NOTICE If drilling is required during installation: •...
Page 23 5.2.1 Environment Requirements WARNING Poor installation environment will affect system performance! • Ensure that the inverter is installed in a well-ventilated place and the heat dissipation system or vent is not blocked. • Do not install the inverter in an environment with flammable and explosive objects or smoke and strong electric fields.
Page 24 5.2.3 Angle Requirements The recommended installation angle for inverter is vertical or backward tilt not exceed 15 degrees. The inverter must not be installed horizontally, rotated, inverted, tilted forward or exceed the backward tilt angle. Figure 5.5 Installation angle requirements 5.2.4 Clearance Requirements Reserve enough clearance around the inverter to ensure sufficient space for heat dissipation.
Page 25 For multiple inverters, recommended as following: Figure 5.7 Installation space requirements for multiple inverters...
Page 26 5.2.5 Installation Tools Installation tools include but are not limited to the following recommended ones. Other auxiliary tools can be used if necessary. Safety goggles Noise-cancelling Dust mask Safety gloves earplugs Safety shoes Utility knife Marker Anti-static wrist strap Wire cutter Wire stripper Spirit level Rubber mallet...
Page 27 5.3 Installation 5.3.1 Moving Inverter CAUTION • When carrying out transportation, turnover, installation and other operations, it is necessary to comply with the laws, regulations and relevant standards of the country or region. • Before installation, the inverter should be taken out of the packaging box and transported to the installation site.
Page 28 Inverter is installed on the wall by means of wall-mounting bracket and the expansion plug sets. The following expansion plug set is recommended for the installation. (1) Self-tapping screw(M6) (2) Expansion tube Figure 5.11 Expansion plug set 5.3.3 Installing Inverter Inverter is installed on the wall by means of wall-mounting bracket and NOTICE •...
Page 29 6 Electrical Connection 6.1 Safety Instructions DANGER • All operations during the electrical connection process, as well as the specifications of cables and components used, must comply with local laws and regulations. • Before performing electrical connections, disconnect the inverter and all switches connected to it to ensure that all equipment is powered off.
Page 30 6.2 Electrical Connection Overview WARNING • It is important to install circuit breakers on all input cables to prevent electrical short circuits and potential damage to the inverter. • Ensure that all output cables are securely connected to the circuit breakers to avoid any malfunction of the inverter.
Page 31 Table 6.1 Cable / Breaker Recommend Cable/Breaker Type Recommended models Battery cable Complying with 150A standard 25mm² and above PV cable Common outdoor PV cable in the industry 4mm² and above EPS cable Outdoor 3-core(L, N and PE) copper wire cable 6mm² and above GEN cables cable Outdoor 3-core(L, N and PE) copper wire cable 6mm²...
Page 32 3.Connect the ground cable with M4 screw. Figure 6.2 Steps for connecting the protective ground wire 6.4 Grid Connection 6.4.1 AC Side Requirements Only with the permission of the local power grid department can the inverter be connected to the grid. Before connecting the inverter to the grid, make sure that the grid voltage and frequency meet the requirements, as specified in the ‘Technical Data Sheet’.
Page 33 3.Wire the cable through a→b . 4.Make sure L/N/PE cable go into the socket c with the right hole(as shown below). Tighten the bolts d on socket c on each cable. 5.Put b and c together. If you hear a ‘click’, two pieces connected well. 6.Screw on the cover a to complete the assembly of the connector.
Page 34 NOTICE • When connecting a generator to the GEN port, it should ensure that the N and PE cables are shorted between the generator and the inverter. 6.6 EPS Connection The wiring and connection steps for the EPS ports are the same as the grid ports. Please refer to section 6.4.2 for the wiring steps for the grid ports and follow the same procedure for the load ports.
Page 35 WARNING • Do not ground the positive or negative terminals of the solar modules, as this can severely damage the inverter. • Choose high-quality and reliable solar modules. Ensure that the maximum open-circuit voltage and maximum short-circuit current of each photovoltaic string are within the allowable range of the inverter, as specified in the ‘Technical Data Sheet’...
Page 36 1.Prepare the PV cable as required. The positive cable should be red color or as local regulation. The negative cable should be black color or as local regulation. Remove insulation sleeve for a proper length from the head of cables. Use terminal crimping tool make the cable and terminal connected tightly. 2.Insert the cable into MC4 cable coupler.
Page 37 5.Ensure the PV switch is OFF. Then connect MC4 securely to PV port on the inverter. After hearing a ‘click’, the PV connectors are connected well. 6.8 Battery Connection This section mainly describes the cable connections on the inverter side. Refer to the instructions supplied by the battery manufacturer for the connections on the battery side and configuration.
Page 38 3.Before connecting checking the positive and negative port carefully. Insert the cable into mounting plug of battery port on inverter. Use cross screws to secure DT terminal. 4.Tighten Battery terminal capa in clockwise direction. 6.9 Communication Cable Connection The CAN cable or RS485 cables enables the communication between the inverter and the Li-ion battery. You can choose one of the pass protocols.
Page 39 1.Remove the screws from the COM port cover. 2.When we connect BMS cable, take one waterproof pluga out first. Wire the cable from Capd→sealing ringc→sealing ringb, then connect the RJ45 terminal to the BMS port. The same connection method is used for other communication cables.
Page 40 6.10.2 Electric Meter Connection The electric meter is 35mm DIN type. It should be fixed on a rail Terminal 24 and 25 is for RS485 communication. After connecting L and N line, plug RJ45 connector(cable from terminal 24 and 25) of electric meter into Meter/Grid Current port.
Page 41 7.2 System Power-on If all of the items mentioned above meet the requirements, proceed as follows to start up the inverter for the first time. Before turn on the AC switch between the inverter and the grid, you need to use a multimeter AC voltage gear to measure whether the AC voltage is within the allowable range.
Page 42 NOTICE • By using the UP and DOWN buttons, you can move the cursor up and down or flip through pages. Pressing the ENTER key will allow you to enter sub-pages or confirm settings information. Pressing the ESC key will take you back to the previous page. •...
Page 43 7.3.1 Home page After powering on, if there is a fault, the content of the real-time fault page will be automatically displayed. If there is no fault, it will enter the home page. Pressing the ENTER key on the home page will allow access to four sub-pages, including: 1.Detailed Info 2.Log...
Page 44 2)Page You can view the current operating status of the inverter. Interface Language: Grid Standard: PV Mode: Bat: Mode: Grid: Anti-reflux: Gen: BMS: Sys Temp: PV1: Grid: Voltage: 0.0V Voltage: 0.0V Current: 0.0A Current: 0.0A Power: 0W Frequency: 0.00Hz PV2: Act-Power: 0W Voltage: 0.0V React-Power: 0Var...
Page 45 7.3.3 Log Interface Description When a malfunction occurs or you want to view the →Real-time Alarm operation records, you can enter the 3 sub-pages History Alarm of 'Log' to view the fault information and operation Operation Records records. Real Fault Display a total of 20 real-time alarm, including fault Fault code: Fault content code and fault content.
Page 46 2.1) Peak Shift Interface Description Peak Shift →Peak Time 1 In the Peak Shift mode, there are a total of six time Peak Time 2 Peak Time 3 period that can be set. You can refer to the time Valley Time 1 slots provided by the local power grid for setting.
Page 47 3)Grid Set Interface Description Grid Set →Anti-reflux The grid settings include six items: anti-reflux Grid Standard control, grid-connection standards, reactive power React-Power Mode control, power set, power factor setting and Power Set detector selection. Power Factor Set Detector Select Once the anti-reflux setting is enabled, the inverter will be unable to feed electricity back into the grid Anti-reflux →Enable...
Page 48 4) Battery Set Interface Description The battery settings include battery enablement Battery Set and battery type settings. Only when the battery →Battery Enable enablement is turned on, the battery can function Battery Type properly, and all other settings related to the battery will take effect.
Page 49 4.2) Lead-acid Battery Interface Description Lead-acid For lead-acid batteries, the parameter settings →Capacity And Current include capacity, current, SOC threshold, and SOC Threshold voltage. Additionally, battery equalization can also Voltage be performed. Battery Repair Based on the relevant parameters of the actual battery, set the battery capacity, maximum charging Capacity And Current current, and discharge current.
Page 50 6) Gen Set Interface Description Gen Set Set the generator mode selection , power output, →Mode Select and generator trigger SOC. Gen Apparent Power After the generator failure, it is necessary to repair Clear Gen Fault the generator fault and manually clear the fault Gen Trip SOC before reconnecting it to the inverter.
Page 51 7) System Set Interface Description System Set →Language Time System settings include language, time and Password password settings. You can also clear faults, view Clear Alarm and clear logs, restore factory settings, set up Clear Record remote control, protection mode, low power mode Factory and quiet mode.
Page 52 7.3.5 Statistics Interface Description Statistics →Day Statistics Inverters can collect and summarize data for the Month Statistics current day, month, year and overall. Year Statistics Total Statistics Day Statistics PV:0.0KWh PV1:0.0KWh PV2:0.0KWh No matter which statistical information it is, you can Sell:0.0KWh view the information about PV, selling electricity, Buy:0.0KWh...
Page 53 8 System Decommissioning 8.1 Decommissioning Inverter WARNING Danger of burns! Even if the inverter is shut down, it may still be hot and cause burns. Wear protective gloves before operating the inverter after it cools down. Step 1: Disconnect the AC circuit breaker between the inverter and the power grid. Step 2: Turn the 'DC SWITCH' on the bottom of the inverter to 'OFF'.
Page 54 NOTICE • Before troubleshooting, it is important to strictly follow the detailed steps in section 8.1 to disconnect the electrical connections and shut down the inverter to avoid any personal injury. • After troubleshooting and resolving the issue based on the recommended solutions, follow the detailed steps in section 7 to power on and restart the inverter.
Page 55 1. Inverter Information: serial number, software version, fault codes, operating conditions and status before and after the fault, fault occurrence time and frequency. 2. Grid and Battery Conditions: whether the grid can connect to the home load normally, whether the battery operation is normal.
Page 56 Category Fault Codes and Abbreviations Fault Explanation E200: Mid-Bus OVP Middle-Bus Overvoltage Error E203: DC OCP DC Overcurrent Protection E207: Bat OVP Battery Overvoltage Protection E301: PV1 OVP PV1 Overvoltage Protection E302: Differ PV OVP PV Over Voltage Difference E321: PV2 OVP PV2 Overvoltage Protection E400: Gen Start Fail Generator Start Failure...
Page 57 Category Fault Codes and Abbreviations Fault Explanation E721: BMS Dischg OCP BMS Discharge Overcurrent Protection Error E722: BMS Chg OCP BMS Charge Overcurrent Protection Error E730: BMS OVP Err BMS Overvoltage Protection Error E731: BMS UVP Err BMS Undervoltage Protection Error E732: BMS OTP Err BMS Overtemperature Protection Error E733: BMS UTP Err...
Page 58 9.2.2 Routine Maintenance Table 9.3 Routine maintenance requirements Check Item Check Method Maintenance cycle Check if the inverter is damaged or deformed. Check if there are any abnormal sounds during the operation of System running At least once every six the inverter.
Page 59 Specification HN3KS HN3K6S HN4KS HN5KS HN6KS Rated grid a.c. 230V a.c. 230V a.c. 230V a.c. 230V a.c. 230V voltage Rated grid 50Hz/60Hz 50Hz/60Hz 50Hz/60Hz 50Hz/60Hz 50Hz/60Hz frequency Grid input a.c. 176- 280V a.c. 176- 280V a.c. 176- 280V a.c. 176- 280V a.c. 176- 280V voltage range Rated grid output active...
Page 60 Guangzhou Shixiao Technology Co., Ltd CVTE Second Industrial Park, Yunpu 4th Road, Guangzhou, P.R.China Tel: +86-20-86154560 E-mail: solar-service@maxhub.com...

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