Rich Solar Off Grid Solar Inverter User Manual

Information on This Manual

This manual is valid for the following devices: RS-H3000-24, RS-H3000-48.

Scope: This manual describes the assembly, installation, operation, and troubleshooting of this unit. Please read this manual carefully before installations and operations.

Target Group: This document is intended for qualified persons and end users. Tasks that do not require any particular qualification can also be performed by end users. Qualified persons must possess the following skills:

• Knowledge of how an inverter works and is operated.
• Training in handling dangers and risks associated with installing and using electrical devices and installations.
• Training in the installation and commissioning of electrical devices and installations.
• Knowledge of applicable standards and directives.
• Knowledge of and compliance with this document and all safety information.

Safety Instructions

WARNING: This chapter contains important safety and operating instructions. Read and keep this manual for future reference.

1. Before using the unit, read all instructions and caution marks on the unit, understand the batteries, and all appropriate sections of this manual.
2. Do not disassemble the unit. Take it to a qualified service center when service or repair is required. Incorrect re-assembly may result in a risk of electric shock or fire.
3. To reduce the risk of electric shock, disconnect all wiring before attempting any maintenance or cleaning. Turning off the unit will not reduce this risk.
4. Be very cautious when working with metal tools on or around batteries. A potential risk, such as dropping a tool to spark or short circuit batteries or other electrical parts, could cause an explosion.
5. For optimum operation of this off-grid solar inverter, please follow required specifications to select appropriate cable size. It is very important to correctly operate this off-grid solar inverter.
6. Please strictly follow installation procedures when you want to disconnect AC or DC terminals. Please refer to the INSTALLATION section of this manual for details.
7. GROUNDING INSTRUCTIONS - This off-grid solar inverter should be connected to a permanent grounded wiring system. Be sure to comply with local requirements and regulations to install this inverter.
8. Fuses with provided standards are provided as over-current protection for the battery supply.

CAUTION: Only qualified personnel can install this device with a battery. Never cause AC output and DC input to short circuit. Do not connect to the mains when DC input is short-circuited. Never charge a frozen battery.

Warning!! Only qualified service persons are able to service this device. If errors still persist after following the troubleshooting table, please send this off-grid solar inverter back to your local dealer or service center for maintenance.

Introduction

This is a multifunctional off-grid solar inverter, integrated with an MPPT solar charge controller, a high-frequency pure sine wave inverter, and a UPS function module in one machine, which is perfect for off-grid backup power and self-consumption applications. The transformerless design provides reliable power conversion in a compact size.

The whole system also needs other devices to achieve complete running, such as PV modules, generator, or utility grid. Please consult with your system integrator for other possible system architectures depending on your requirements. The WiFi/GPRS module is a plug-and-play monitoring device to be installed on the inverter. With this device, users can monitor the status of the PV system from their mobile phone or from the website anytime, anywhere.

Features:

• 24V/48V battery system
• Pure sine wave output 3KW
• Inbuilt MPPT 80A
• High-frequency inverter with small size and light weight
• Overload, short circuit, and deep discharge protection
• Compatible with mains voltage or generator power
• Parallel operation up to 6 units
• With CAN/RS485 for BMS communication
• WIFI / GPRS remote monitoring (optional)

Product Overview:

The front panel of the inverter features:

• ① LCD display
• ② Status indicator
• ③ Charging indicator
• ④ Fault indicator
• ⑤ Function buttons

Single Model Rear Panel Connections:

• ⑥ AC input
• ⑦ WiFi/GPRS communication port
• ⑧ USB communication port
• ⑨ Dry contact
• ⑩ PV input
• ⑪ Power on/off switch
• ⑫ Battery input
• ⑬ Parallel communication ports (only for parallel model)
• ⑭ Current sharing ports (only for parallel model)
• ⑮ AC output
• ⑯ Circuit breaker
• ⑰ BMS communication port (support CAN/RS485 protocol)
• ⑱ RS485 communication port (for expansion)

Parallel Model Rear Panel Connections: (Same as Single Model, with additional parallel ports)

Diagram Description: A diagram shows the front panel of the inverter with numbered indicators and buttons. Another diagram shows the rear panel connections for both single and parallel models, detailing various input/output and communication ports.

Installation

Unpacking and Inspection:

Before installation, please inspect the unit. Ensure that nothing inside the package is damaged. You should have received the following items:

• The unit x 1
• User manual x 1
• USB Communication cable x 1
• Software CD x 1
• Current sharing cable (parallel model available)
• Parallel communication cable (parallel model available)

Preparation:

Before connecting all wiring, remove the bottom cover by unscrewing two screws as shown in the diagram.

Diagram Description: An illustration shows the inverter with arrows pointing to two screws on the bottom cover, indicating removal.

Mounting the Unit:

Consider the following points before selecting the installation location:

• Do not mount the inverter on flammable construction materials.
• Mount on a solid surface.
• Install this inverter at eye level to allow the LCD display to be read at all times.
• The ambient temperature should be between 0°C and 55°C to ensure optimal operation.
• The recommended installation position is to be adhered to the wall vertically.
• Ensure sufficient clearance around the unit for heat dissipation and wire removal, as shown in the diagram (approximately 20cm to the sides, 50cm above and below).

SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.

Install the unit by screwing three screws. M4 or M5 screws are recommended.

Diagram Description: An illustration shows the inverter mounted on a wall with recommended clearance dimensions indicated.

Battery Connection:

Lead-acid Battery Connection:

You can choose a proper capacity lead-acid battery with a nominal voltage of 48V for the 48V model and 24V for the 24V model. You need to select the battery type as "AGM (default)" or "Flooded".

CAUTION: For safety operation and regulation compliance, it is requested to install a separate DC over-current protector or disconnect device between the battery and the inverter. While not always required in some applications, over-current protection is still recommended. Refer to the table for typical amperage and required fuse or breaker size.

WARNING! All wiring must be performed by a qualified person.

WARNING! It is very important for system safety and efficient operation to use appropriate cable for battery connection. To reduce the risk of injury, please use the proper recommended cable and terminal size.

Recommended Battery Cable and Terminal Size:

Note: For lead-acid batteries, the recommended charge current is 0.2C (C = battery capacity).

Battery Connection Steps:

1. Assemble the battery ring terminal based on the recommended battery cable and terminal size.
2. Connect all battery packs as required by the unit. It is suggested to connect at least a 100Ah capacity battery for the 3KVA/48V model and at least a 200Ah capacity battery for the 3KVA/24V model.
3. Insert the ring terminal of the battery cable flatly into the battery connector of the inverter and ensure the bolts are tightened with a torque of 2-3 Nm. Make sure polarity is correctly connected at both the battery and the inverter/charger, and that the ring terminals are tightly screwed to the battery terminals.

WARNING: Shock Hazard

Installation must be performed with care due to high battery voltage in series.

CAUTION!! Do not place anything between the flat part of the inverter terminal and the ring terminal, as overheating may occur.

CAUTION!! Do not apply anti-oxidant substance on the terminals before they are connected tightly.

CAUTION!! Before making the final DC connection or closing the DC breaker/disconnector, ensure positive (+) is connected to positive (+) and negative (-) is connected to negative (-).

Lithium Battery Connection:

If you choose a lithium battery, you can only use lithium batteries that have been configured. Lithium batteries have two connectors: an RJ45 port for BMS and a power cable.

Lithium Battery Connection Steps:

1. Assemble the battery ring terminal based on the recommended battery cable and terminal size (refer to Lead-acid Battery connection section for details).
2. Insert the ring terminal of the battery cable flatly into the battery connector of the inverter and ensure the bolts are tightened with a torque of 2-3 Nm. Ensure polarity is correctly connected at both the battery and the inverter/charger, and that the ring terminals are tightly screwed to the battery terminals.
3. Connect the RJ45 end of the battery to the BMS communication port (RS485 or CAN) of the inverter.
4. Connect the other RJ45 end to the battery communication port (RS485 or CAN) of the inverter.

Note: If choosing a lithium battery, ensure the BMS communication cable is connected between the battery and the inverter. You must select the battery type as "lithium battery".

Diagram Description: Illustrations show the connection of ring terminals to battery connectors and inverter terminals for both lead-acid and lithium batteries. A diagram shows the RJ45 connection for BMS communication.

Lithium Battery Communication and Setting

To communicate with the battery BMS, set the battery type to "LI" in Program 05. The LCD will then switch to Program 36 for setting the protocol type. Consult your supplier before choosing a battery model.

1. Connect the RJ45 end of the battery to the BMS communication port of the inverter.

Ensure the lithium battery BMS port connects to the inverter pin-to-pin. The inverter's BMS port and RS485 port pin assignments are shown below:

Diagram Description: A diagram shows the RJ45 connector pinout for BMS communication.

2. LCD Setting:

To connect the battery BMS, set the battery type to "LI" in Program 05. After setting "LI" in Program 05, it will switch to Program 36 to choose the battery type. Program 36 offers several options:

• Battery type: AGM (default), Flooded, Lithium (only suitable when communicated with BMS), User-Defined, User-Defined 2 (suitable when lithium battery without BMS communication).
• If "User-Defined" or "User-Defined 2" is selected, battery charge voltage and low DC cut-off voltage can be set in programs 19, 20, and 21. For "User-Defined 2", it is recommended to set the same voltage in programs 19 and 20 (full charging voltage point of lithium battery). The inverter will stop charging when the battery voltage reaches this setting.

RS485 Communication Protocol:

• Protocol 1, Protocol 2, ..., Protocol 50, Protocol 51, Protocol 52, ..., Protocol 99.

CAN Communication Protocol:

• Protocol 50, Protocol 51, Protocol 52, ..., Protocol 99.

Note: When the battery type is set to Li, settings 12, 13, and 21 will display percentages. When the battery type is "LI", the Maximum charge current cannot be modified by the user. If communication fails, the inverter will cut off output.

Program 12: Setting SOC point back to utility source (Default 50%, 6%~95% Settable)

Program 13: Setting SOC point back to battery mode (Default 95%, 10%~100% Settable)

Program 21: Low DC Cut-off SOC. (Default 20%, 5%~50% Settable)

Note: For any questions about communicating with BMS, please consult the manufacturer.

3. Communicating with Battery BMS in Parallel System:

If you need to communicate with BMS in a parallel system, ensure the BMS communication cable is connected between the battery and one inverter in the parallel system. It is recommended to connect it to the master inverter.

Diagram Description: A diagram illustrates multiple inverters connected in parallel, with a BMS communication cable connecting the battery to one of the inverters.

AC Input/Output Connection

CAUTION!! Before connecting to the AC input power source, install a separate AC breaker between the inverter and the AC input power source. This will ensure the inverter can be securely disconnected during maintenance and fully protected from over-current of the AC input. The recommended AC breaker specification is 40A for 3KVA.

CAUTION!! There are two terminal blocks marked "IN" and "OUT". Please do NOT mis-connect input and output connectors.

WARNING! All wiring must be performed by a qualified personnel.

WARNING! It is very important for system safety and efficient operation to use appropriate cable for AC input connection. To reduce the risk of injury, please use the proper recommended cable size.

Suggested Cable Requirement for AC Wires:

AC Input/Output Connection Steps:

1. Before making AC input/output connections, ensure the DC protector or disconnector is open.
2. Remove insulation sleeve 10mm for six conductors. Shorten phase L and neutral conductor N by 3mm.
3. Insert AC input wires according to the polarities indicated on the terminal block and tighten the terminal screws. Connect the PE (protective earth) conductor first.
4. Then, insert AC output wires according to the polarities indicated on the terminal block and tighten the terminal screws. Connect the PE (protective earth) conductor first.
5. Ensure the wires are securely connected.

Diagram Description: Illustrations show the correct wiring for AC input and output, indicating the PE (ground, yellow-green), L (line, brown or black), and N (neutral, blue) connections to the terminal blocks.

CAUTION: Important

Ensure AC wires are connected with correct polarity. If L and N wires are connected reversely, it may cause a utility short circuit when these inverters are operated in parallel.

CAUTION: Appliances such as air conditioners require at least 2-3 minutes to restart to allow refrigerant gas inside the circuits to balance. If a power shortage occurs and recovers quickly, it may damage connected appliances. To prevent this, check with the appliance manufacturer if it is equipped with a time-delay function before installation. Otherwise, this off-grid solar inverter may trigger an overload fault and cut off output to protect your appliance, but it could still cause internal damage to the air conditioner.

PV Connection

CAUTION: Before connecting to PV modules, please install a separate DC circuit breaker between the inverter and PV modules.

WARNING! All wiring must be performed by a qualified personnel.

WARNING! It is very important for system safety and efficient operation to use appropriate cable for PV module connection. To reduce the risk of injury, please use the proper recommended cable size.

Suggested Cable Requirement for PV Wires:

PV Module Selection:

When selecting PV modules, consider the following parameters:

1. The open-circuit voltage (Voc) of PV modules must not exceed the maximum PV array open-circuit voltage of the inverter.
2. The open-circuit voltage (Voc) of PV modules should be higher than the minimum battery voltage.

PV Module Connection Steps:

1. Remove insulation sleeve 10 mm for positive and negative conductors.
2. Check the correct polarity of the connection cable from the PV modules and the PV input connectors. Connect the positive pole (+) of the connection cable to the positive pole (+) of the PV input connector. Connect the negative pole (-) of the connection cable to the negative pole (-) of the PV input connector.
3. Ensure the wires are securely connected.

Diagram Description: An illustration shows the PV connection, indicating PV+ and PV- terminals on the inverter and the connection of PV cables.

Final Assembly:

After connecting all wiring, replace the bottom cover by screwing two screws as shown in the diagram.

Diagram Description: An illustration shows the bottom cover being reattached to the inverter.

Communication Connection:

Use the supplied communication cable to connect the inverter to a PC. Insert the bundled CD into a computer and follow the on-screen instructions to install the monitoring software. For detailed software operation, refer to the software's user manual.

Dry Contact Signal:

A dry contact (3A/250VAC) is available on the rear panel. It can be used to deliver a signal to an external device when the battery voltage reaches a warning level.

Diagram Description: A table shows the conditions for the dry contact port (NC, C, NO) and their corresponding states (Open, Close) based on unit status and battery voltage.

Operation

Power ON/OFF:

Once the unit has been properly installed and the batteries are connected, simply press the On/Off switch (located on the bottom of the case) to turn on the unit.

Operation and Display Panel:

The operation and display panel, located on the front of the inverter, includes three indicators, four function keys, and an LCD display that shows operating status and input/output power information.

Diagram Description: An illustration shows the front panel of the inverter with numbered indicators (LCD display, Status, Charging, Fault) and function buttons.

LED Indicator:

Function Buttons:

LCD Display Icons:

Diagram Description: Various icons are shown with their functions:

• Input Source Information: AC (Indicates AC input), PV (Indicates PV input).
• Input/Output Display: Shows input voltage, input frequency, PV voltage, battery voltage, and charger current.
• Configuration Program and Fault Information: Indicates setting programs, warning codes, and fault codes. Warning codes flash with a warning code; Fault codes light up with a fault code.
• Output Information: Shows output voltage, output frequency, load percentage, load in VA, load in Watt, and discharging current.
• Battery Information: Indicates battery level (0-24%, 25-49%, 50-74%, 75-100%) and charging status. Icons indicate charge priority: SOLAR (solar first), UTILITY (utility first). SOLAR blinking means solar only; SOLAR and UTILITY on means combined charging.

Battery Charging Status (AC Mode):

Battery Capacity (Battery Mode):

Diagram Description: Illustrations show different battery level indicators on the LCD screen.

Load Information:

• OVER LOAD: Indicates overload.
• Load Percentage Bars: Indicate load level by 0-24%, 25-49%, 50-74%, and 75-100%.

Mode Operation Information:

• [AC icon]: Indicates unit connects to the mains.
• [PV icon]: Indicates unit connects to the PV panel.
• BYPASS: Indicates load is supplied by utility power.
• [AC charging icon]: Indicates the utility charger circuit is working.
• [DC/AC inverter icon]: Indicates the DC/AC inverter circuit is working.
• Output Priority Icons: SOL.FIRST (solar first), BAT.FIRST (battery first), UTI.FIRST (utility first).

Mute Operation:

• [Mute icon]: Indicates unit alarm is enabled.

LCD Setting

After pressing and holding the ENTER button for 3 seconds, you will enter setting mode. Use the UP or DOWN buttons to select setting programs, then press ENTER to confirm or ESC to exit.

Setting Programs:

Battery Equalization

The equalization function is added to the charge controller. It reverses negative chemical effects like stratification, where acid concentration is higher at the bottom of the battery. Equalization also removes sulfate crystals from plates, preventing capacity reduction due to sulfation. Periodic equalization is recommended.

How to Apply Equalization Function:

Enable battery equalization in LCD setting program 43 first. Then, apply the function using one of these methods:

1. Setting the equalization interval in program 47.
2. Activating equalization immediately in program 48.

When to Equalize:

In the float stage, when the set equalization interval arrives or equalization is activated immediately, the controller enters the Equalize stage.

Diagram Description: A graph shows the battery voltage stages: Bulk, Absorption, Float, and Equalize, illustrating the voltage levels during each stage.

Equalize Charging Time and Timeout:

In the Equalize stage, the controller charges the battery to its maximum capacity until it reaches the battery equalization voltage. Constant-voltage regulation maintains this voltage. The battery remains in the Equalize stage until the set battery equalized time is reached.

If the battery voltage does not reach the equalization voltage by the end of the equalized time, the controller will extend the time. If the voltage is still low after the timeout, equalization stops, and the controller returns to the float stage.

Diagram Description: Graphs illustrate the equalization process, showing voltage and current changes over time, and the effect of equalized time and timeout.

Specifications

Table 1 General Specifications:

Table 2 Line Mode Specifications:

Output Power Derating:

When AC input voltage drops to 95V, the output power will be derated.

Diagram Description: A graph shows output power derating based on input voltage. Rated Power is at 140V input, dropping to 20% Power at 65V input, with a transition point at 95V.

Table 3 Inverter Mode Specifications:

Table 4 Charge Mode Specifications:

Trouble Shooting

Problem: Unit shuts down automatically during startup process.

• LCD/LED/Buzzer: LCD/LEDs and buzzer are active for 3 seconds, then complete off.
• Explanation: The battery voltage is too low (<1.91V/Cell).
• What to do: 1. Re-charge battery. 2. Replace battery.

Problem: No response after power on.

• LCD/LED/Buzzer: No indication.
• Explanation: 1. Battery voltage is very low (<1.4V/Cell). 2. Battery polarity is connected reversed.
• What to do: 1. Check if batteries and wiring are connected well. 2. Re-charge battery. 3. Replace battery.

• LCD/LED/Buzzer: Input voltage is 0 on the LCD and green LED is flashing.
• Explanation: Input protector is tripped.
• What to do: Check if AC breaker is tripped and AC wiring is connected well.

Problem: Mains exist but the unit works in battery mode.

• LCD/LED/Buzzer: Green LED is flashing.
• Explanation: Insufficient quality of AC power (shore or generator).
• What to do: 1. Check if AC wires are too thin and/or too long. 2. Check if the generator is working well or if the input voltage range setting is correct.

Problem: When it's turned on, internal relay is switching on and off repeatedly.

• LCD/LED/Buzzer: Green LED is flashing.
• Explanation: Set "Battery First" or "Solar First" as the priority of output source.
• What to do: Change output source priority to Utility first.

• LCD/LED/Buzzer: LCD display and LEDs are flashing.
• Explanation: Battery is disconnected.
• What to do: Check if battery wires are connected well.

Fault Code 01:

• Explanation: Fan fault.
• What to do: 1. Check if all fans are working properly. 2. Replace the fan.

Fault Code 02:

• Explanation: Internal temperature of component is over 100°C.
• What to do: 1. Check if the unit's airflow is blocked or if the ambient temperature is too high. 2. Check if the thermistor plug is loose. Restart the unit; if the error persists, contact a repair center.

Fault Code 03:

• Explanation: Battery is over-charged.
• What to do: Check if battery specifications and quantity meet requirements.

Warning Code 04:

• Explanation: The battery voltage is too high.
• What to do: 1. Measure battery voltage in DC input. 2. Check battery SOC in LCD (for Li battery). 3. Recharge the battery.

Fault Code 05:

• Explanation: Output short-circuited.
• What to do: Check if wiring is connected well and remove abnormal load.

Fault Code 06/58:

• Explanation: Output abnormal (Inverter voltage is higher than 150Vac or less than 40Vac).
• What to do: 1. Reduce the connected load. 2. Restart the unit; if the error persists, contact a repair center.

Fault Code 07:

• Explanation: The inverter is overload 110% and time is up.
• What to do: Reduce the connected load by switching off some equipment.

Fault Code 08:

• Explanation: Bus voltage is too high.
• What to do: If using a lithium battery without communication, check if voltage points in programs 19 and 21 are too high for the lithium battery. Restart the unit; if the error persists, contact a repair center.

Fault Code 09/53/57:

• Explanation: Internal components failed.
• What to do: Restart the unit; if the error persists, contact a repair center.

Warning Code 15:

• Explanation: The input status is different in parallel systems.
• What to do: Check if AC input wires of all inverters are connected well.

Warning Code 16:

• Explanation: Input phase is not correct.
• What to do: Change the input phase S and T wiring.

Warning Code 17:

• Explanation: The output phase is not correct in parallel.
• What to do: 1. Ensure parallel settings are the same for all inverters (single phase, 3P1, 3P2, 3P3). 2. Ensure all phases of the inverters are powered on.

Warning Code 20:

• Explanation: Li battery cannot communicate with the inverter.
• What to do: 1. Check communication line connection between inverter and battery. 2. Check if the BMS protocol type setting is correct.

Fault Code 51:

• Explanation: Over current or surge.
• What to do: Restart the unit; if the error persists, contact a repair center.

Fault Code 52:

• Explanation: Bus voltage is too low.
• What to do: If the battery is connected well, contact a repair center.

Fault Code 55:

• Explanation: Output voltage is unbalanced.
• What to do: If the battery is connected well, contact a repair center.

Fault Code 56:

• Explanation: Battery is not connected well or fuse is burnt.
• What to do: If the battery is connected well, contact a repair center.

Fault Code 60:

• Explanation: Negative power fault.
• What to do: 1. Check if AC output is connected to the grid input. 2. Verify Program 8 settings are the same for all parallel inverters. 3. Check if current sharing cables are connected correctly within the same parallel phases. 4. Ensure all neutral wires of parallel units are connected together. 5. If the problem persists, contact a repair center.

Fault Code 80:

• Explanation: CAN fault.
• What to do: 1. Check if parallel communication cables are connected well. 2. Verify Program 23 settings are correct for the parallel system. 3. If the problem persists, contact a repair center.

Fault Code 81:

• Explanation: Host loss.
• What to do: 1. Check if parallel communication cables are connected well. 2. Verify Program 23 settings are correct for the parallel system. 3. If the problem persists, contact a repair center.

Note: To restart the inverter, all power sources must be disconnected. After the LCD screen is off, use only the battery to boot.

Warning Indicator:

Parallel Installation Guide

Introduction:

This inverter can be used in parallel with three different operation modes:

1. Parallel operation in single phase with up to 6 units.
2. Maximum 6 units work together to support three-phase equipment (four units support one phase maximum).
3. Maximum 6 units work together to support split-phase equipment (five units support one phase maximum).

Note: If the package includes share current cable and parallel cable, the inverter supports parallel operation by default. If not, purchase a parallel kit and follow the instructions from professional technical personnel.

Package Contents:

The parallel kit typically includes:

• Parallel board
• Parallel communication cable
• Current sharing cable

Diagram Description: Images show the parallel board, parallel communication cable, and current sharing cable.

Parallel Board Installation:

The installation involves several steps:

1. Remove the wire cover by unscrewing all screws.
2. Remove the communication board by unscrewing two screws.
3. Remove the RS485 communication board (for BMS models) by unscrewing two screws.
4. Remove two screws, disconnect 2-pin and 14-pin cables, and take out the board underneath the communication board.
5. Remove two screws to take out the parallel communication cover.
6. Install the new parallel board with 2 screws.
7. Reconnect the 2-pin and 14-pin cables to their original positions.
8. Reinstall the communication board.
9. Replace the wire cover. The inverter is now ready for parallel operation.

Diagram Description: A series of illustrations guide the user through the steps of installing the parallel board and connecting cables.

Mounting the Unit (Multiple Units):

When installing multiple units, ensure proper air circulation by allowing approximately 20cm clearance to the sides and 50cm above and below each unit. Install each unit on the same level.

Diagram Description: An illustration shows multiple inverters mounted side-by-side with recommended clearance dimensions.

Wiring Connection:

Recommended Battery Cable and Terminal Size for Each Inverter:

Note: Ensure all battery cables have the same length to prevent voltage differences between parallel inverters.

Recommended AC Input and Output Cable Size:

Connect the cables of each inverter together. For battery cables, use a connector or bus-bar as a joint. The cable size from the joint to the battery should be X times the cable size in the tables, where X is the number of inverters connected in parallel. Apply the same principle for AC input and output.

CAUTION!! Install breakers at the battery and AC input sides to ensure secure disconnection during maintenance and protection from over-current.

Recommended Breaker Specification of Battery for Each Inverter:

Note: For a single system breaker, the rating should be X times the rating of 1 unit, where X is the number of parallel inverters.

Recommended Breaker Specification of AC Input (Single Phase):

Note 1: A 50A breaker can be used for 1 unit, and each inverter can have its own AC input breaker. Note 2: For three-phase systems, use a 4-pole breaker rated for the phase with the maximum units, or follow Note 1.

Recommended Battery Capacity:

WARNING! Ensure all inverters share the same battery bank; otherwise, they will enter fault mode.

Parallel Operation in Single Phase:

Diagram Description: Wiring diagrams illustrate power and communication connections for two, three, four, five, and six inverters connected in parallel single-phase operation.

Parallel Operation in Three Phase:

Diagram Description: Wiring diagrams illustrate power and communication connections for three-phase parallel operation: one inverter per phase, two inverters in one phase and one in the remaining, two inverters in each phase, and three inverters in one phase with two in the second and one in the third.

Parallel Operation in Split Phase:

Diagram Description: Wiring diagrams illustrate power and communication connections for split-phase parallel operation: one inverter per phase, and two inverters in each phase.

WARNING: Do not connect the current sharing cable between inverters in different phases, as it may damage them.

Fault Reference Code

This section lists fault codes, their events, and corresponding icons.

Commissioning

Parallel in Single Phase:

1. Requirements: Correct wire connections. Ensure all load-side line wire breakers are open and neutral wires of each unit are connected together.
2. Setup: Turn on each unit and set "PAL" in LCD program 23 for each unit. Then shut down all units.
3. Power On: Turn on all units sequentially, starting with the HOST inverter.

Diagram Description: LCD displays for Master and Slave units are shown during commissioning.

After switching on AC input breakers, if AC connection is detected and phases match settings, the system operates normally. If not, warning 15/16 may appear.

If no fault alarm occurs, the parallel system is installed. Switch on load-side line wire breakers to provide power.

Parallel in Three Phase:

1. Requirements: Correct wire connections. Ensure all load-side line wire breakers are open and neutral wires of each unit are connected together.
2. Setup: Turn on all units and configure LCD program 23 sequentially as 3P1, 3P2, and 3P3. Then shut down all units.
3. Power On: Turn on all units sequentially, starting with the HOST inverter.

Diagram Description: LCD displays for L1-phase, L2-phase, and L3-phase units are shown during commissioning.

After switching on AC input breakers, if AC connection is detected and phases match settings, the system operates normally. If not, warning 15/16 may appear.

If no fault alarm occurs, the three-phase system is installed. Switch on load-side line wire breakers to provide power.

Note 1: For L1-phase, "HS" indicates the HOST inverter; "P1" indicates other L1-phase inverters.

Note 2: To avoid overload, ensure the whole system is operating before turning on load-side breakers.

Note 3: Transfer time exists, potentially causing power interruption for critical devices.

Parallel in Split Phase:

1. Requirements: Correct wire connections. Ensure all load-side line wire breakers are open and neutral wires of each unit are connected together.
2. Setup: Turn on all units. Configure LCD program 23 as 2P0 for phase 1 units and 2P2 (or 2P1) for phase 2 units. (2P0 + 2P1 for 120V/208V split phase; 2P0 + 2P2 for 120V/240V split phase).
3. Power On: Turn on all units sequentially, starting with the HOST inverter.

Diagram Description: LCD displays for L1-phase and L2-phase units are shown during commissioning.

After switching on AC input breakers, if AC connection is detected and phases match settings, the system operates normally. If not, warning 15/16 may appear.

If no fault alarm occurs, the split-phase system is installed. Switch on load-side line wire breakers to provide power.

Note 1: For L1-phase, "HS" indicates the HOST inverter; "P1" indicates other L1-phase inverters.

Note 2: To avoid overload, ensure the whole system is operating before turning on load-side breakers.

Note 3: Transfer time exists, potentially causing power interruption for critical devices.

Contact Information

For support or inquiries:

• Phone: 1-800-831-9889
• Email: sales@richsolar.com
• Website: www.richsolar.com
• Address: 5550 Jurupa St, Ontario, CA 91761