Y&H Hybrid Solar Inverter User Manual

1. Introduction

This manual describes the assembly, installation, operation, and troubleshooting of the Y&H Hybrid Solar Inverter. This multi-function inverter/charger combines the functions of an inverter, solar charger, and battery charger to provide uninterrupted power support. Its comprehensive LCD display offers user-configurable and easy-to-access button operation for settings such as battery charging current, AC/solar charger priority, and acceptable input voltage based on different applications.

1.1 Features

• Pure sine wave inverter
• Programmable supply priority for PV, battery, or Grid
• High PV input voltage range (55~450VDC) to reduce the cost of solar panels
• Built-in Max 80A MPPT solar charge controller
• Compatible with lithium-ion batteries and supports BMS communication (PYLON/PACE only)
• Smart battery charge design to optimize battery life
• Overload, high temperature, and inverter output short circuit protection
• Intelligent fan speed adjustment
• Built-in anti-dust kit for harsh environments (optional)
• WIFI & GPRS available for IOS and Android (optional)
• Cold start function

1.2 Basic System Architecture

The inverter/charger can power various home and office appliances, including motor-type appliances like tube lights, fans, refrigerators, and air conditioners. A typical system includes the inverter/charger, a generator or utility power source, and PV modules.

2. Safety Instructions

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

• Before using the unit, read all instructions and cautionary markings on the unit, the batteries, and all appropriate sections of this manual.
• CAUTION: To reduce risk of injury, charge only deep-cycle lead acid type rechargeable batteries. Other types of batteries may burst, causing personal injury and damage.
• 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.
• To reduce risk of electric shock, disconnect all wirings before attempting any maintenance or cleaning. Turning off the unit will not reduce this risk.
• CAUTION: Only qualified personnel can install this device with battery.
• NEVER charge a frozen battery.
• For optimum operation, follow required specifications to select appropriate cable sizes.
• Be very cautious when working with metal tools on or around batteries. A potential risk exists to drop a tool to spark or short circuit batteries or other electrical parts and could cause an explosion.
• Please strictly follow installation procedure when you want to disconnect AC or DC terminals.
• GROUNDING INSTRUCTIONS: This inverter/charger should be connected to a permanent grounded wiring system. Be sure to comply with local requirements and regulations to install this inverter.
• NEVER cause AC output and DC input short-circuited. Do NOT connect to the mains when DC input short circuits.
• Warning!! Only qualified service persons are able to service this device.

3. Product Overview

3.1 Unit Components

The inverter features a front panel with an LCD display, indicators, and function buttons, and a rear panel with various input/output ports.

Figure 1: Inverter Front and Rear Panel Components

3.2 LCD Display Icons

The LCD display provides critical information about the inverter's status and operation:

3.3 Function Buttons

4. Installation

4.1 Unpacking and Inspection

Before installation, inspect the unit for any damage. The package should contain one inverter unit and one user manual.

4.2 Preparation

Before connecting any wiring, remove the bottom cover by unscrewing two screws.

4.3 Mounting the Unit

Consider the following for mounting:

• Do not mount the inverter on flammable construction materials.
• Mount on a solid surface.
• Install at eye level for easy LCD display reading.
• Allow a clearance of approx. 20 cm to the sides and 50 cm above and below for proper air circulation.
• Ambient temperature should be between 0°C and 55°C.
• Adhere to vertical wall mounting.
• Ensure enough space for heat dissipation and wire removal.

Figure 2: Mounting Clearances

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

Install the unit by screwing two M4 or M5 screws.

4.4 Battery Connection

WARNING! All wiring must be performed by qualified personnel.

CAUTION: For safety and compliance, install a separate DC over-current protector or disconnect device between the battery and inverter.

WARNING! It's very important for system safety and efficient operation to use appropriate cable for battery connection. To reduce risk of injury, use the proper recommended cable as below.

Follow these steps for battery connection:

1. Remove 18 mm of insulation sleeve from positive and negative conductors.
2. Use bootlace ferrules on the ends of positive and negative wires with a proper crimping tool.
3. Connect all battery packs as shown in the diagram below.
4. Insert the battery wires flatly into the inverter's battery connectors and ensure bolts are tightened with a torque of 2 Nm. Verify correct polarity at both the battery and inverter/charger.

Figure 3: Battery Connection Diagram

WARNING: Shock Hazard! Installation must be performed with care due to high battery voltage in series.

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

4.5 AC Input/Output Connection

CAUTION!! Before connecting to AC input power source, install a separate AC breaker between the inverter and AC input power source.

WARNING! All wiring must be performed by qualified personnel.

Follow these steps for AC input/output connection:

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

Figure 4: AC Input/Output Wiring Diagram

4.6 PV Connection

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

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

When selecting proper PV modules, consider the following parameters:

• Open circuit Voltage (Voc) of PV modules must not exceed the max. PV array open circuit voltage of the inverter.

Follow these steps for PV module connection:

1. Remove 10 mm of insulation sleeve from positive and negative conductors.
2. Use bootlace ferrules on the ends of positive and negative wires with a proper crimping tool.
3. Check correct polarity of wire connection from PV modules and PV input connectors. Connect positive pole (+) to positive pole (+) and negative pole (-) to negative pole (-).

Figure 5: PV Connection Diagram

4.7 Final Assembly

After connecting all wirings, replace the bottom cover by screwing in the four screws.

5. Operation

5.1 Power ON/OFF

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

Important Startup/Shutdown Sequence:

• Inverter startup sequence: 1. Battery > 2. AC input or PV input > 3. Load
• Inverter shutdown sequence: 1. Load > 2. AC input or PV input > 3. Turn off the inverter > Exit battery

5.2 LCD Setting

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

Key settings for Lithium Batteries:

• To set the 05 option to "USE" (User-Defined), you must know the lithium battery charging cutoff voltage and discharging cutoff voltage values.
• Setting 26 options: According to the value of lithium battery charging cutoff voltage.
• Setting 27 options: According to the value of lithium battery charging cutoff voltage.
• Setting 29 options: According to the value of lithium battery discharge cutoff voltage.
• Setting 01 option: SBU (Solar Battery Utility) for PV power maximization mode.
• Setting 16 options: C50 (Solar Priority Charging).
• Setting 12 options: If the battery voltage is lower than the default value, the battery stops working, and the utility power supply automatically charges the battery.
• Setting 13 options: If the battery voltage is higher than the set value, the mains power supply stops and switches to battery power supply.

5.3 Operating Mode Description

The inverter supports various operating modes:

• Standby Mode / Power Saving Mode: The inverter is not yet on, but can charge the battery without AC output. In power saving mode, the inverter output is off if the connected load is very low or not detected.
• Line Mode: The unit provides output power from the mains and charges the battery.
• Battery Mode: The unit provides output power from the battery and PV power.
• Fault Mode: Errors are caused by internal circuit errors or external reasons like over-temperature or output short circuits.

6. Maintenance

6.1 Anti-Dust Kit Clearance and Maintenance

Every inverter is pre-installed with an anti-dust kit. This kit helps keep dust out and improves product reliability. The inverter automatically detects the kit and adjusts internal thermal sensors for temperature control.

Maintenance Steps:

1. Remove the screws securing the dustproof case.
2. Remove the dustproof case and take out the air filter foam.
3. Clean the air filter foam and dustproof case.
4. After cleaning, re-assemble the dust-kit back into the inverter.

NOTICE: The anti-dust kit should be cleaned every one month.

7. Troubleshooting

This section provides solutions for common issues. If problems persist, contact a qualified service person.

7.2 Warning Indicators

8. Specifications

Detailed technical specifications for the Y&H Hybrid Solar Inverter are provided below.

Figure 6: Detailed Specifications Table

9. User Tips

• Battery Compatibility: The inverter is compatible with various battery types including Lithium-ion (LiFePO4), Flooded, Gel, and AGM batteries. For Lithium batteries, ensure BMS communication is compatible (PYLON/PACE).
• Startup/Shutdown Sequence: Always follow the correct sequence: Startup (Battery > AC/PV Input > Load) and Shutdown (Load > AC/PV Input > Turn off Inverter > Disconnect Battery).
• Input Activation: Do not turn on each input (AC, PV) at the same time. Allow a brief interval (e.g., 3 minutes) between activating different power sources to ensure stable operation.
• Fan Noise: The inverter features intelligent fan speed adjustment. If you notice constant fan humming, ensure proper ventilation and check for any obstructions.
• 110V Appliances: The inverter's output is 230V. If you need to power 110V appliances, you will need to add an external converter (not included).

10. Warranty and Support

This Y&H Hybrid Solar Inverter comes with a 24-month warranty. For detailed warranty terms, service, or repair, please contact your local dealer or service center.

For further information and detailed diagrams, please refer to the official user manual PDF: Download User Manual (PDF)