Y&H 12KW 48V Solar Hybrid Inverter (Model IVH-12KW-UP) Instruction Manual

1. Introduction

This instruction manual provides comprehensive guidance for the installation, operation, and maintenance of the Y&H 12KW 48V Solar Hybrid Inverter, Model IVH-12KW-UP. This inverter is designed to efficiently manage solar power, battery storage, and grid electricity for various applications, including residential, RVs, cabins, and small businesses. Please read this manual thoroughly before installation and operation to ensure safe and optimal performance.

2. Safety Information

Important Safety Instructions:

• Installation must be performed by qualified personnel in accordance with local electrical codes and regulations.
• Ensure the inverter is disconnected from all power sources (PV, battery, grid) before performing any maintenance or wiring.
• Do not attempt to repair or disassemble the inverter. Refer all servicing to authorized service personnel.
• The inverter is UL1741 certified for US safety standards.
• Observe all warnings and instructions marked on the unit.

Image: Certifications for the Y&H 12KW Hybrid Inverter, including UL1741, IEEE 1547, and CSA22.21071, indicating compliance with safety and grid integration standards.

3. Product Overview

3.1 Key Features

• High-Efficiency Energy Management: Seamlessly integrates solar power, battery storage, and grid electricity.
• Split-Phase/Single-Phase Output: Supports 120V/240V split-phase (L1-L2: 208V/240V, L1-N/L2-N: 120V) and single-phase output.
• Dual MPPT Trackers: Wide PV input range (90Vdc~450Vdc, max 500Vdc) with up to 6000W+6000W PV input power for maximized solar energy harvesting.
• Versatile Battery Compatibility: Supports GEL/AGM/FLA lead-acid and LiFePO4/Lithium-ion batteries (BMS communication via RS485/CAN).
• Multiple Charging Modes: Solar Only, Utility Priority, Solar Priority, and Hybrid (PV + Grid).
• Scalable System: Expandable up to 6 units in parallel for high-power needs.
• Comprehensive Safety: UL1741 certified with 16-layer protection against overload, short-circuit, over-temperature, and reverse polarity.
• Time-Based Energy Scheduling: 3 customizable charging/discharging periods to optimize energy costs.
• Remote Monitoring: Wi-Fi/RS485 remote monitoring via mobile app (Wi-Fi module sold separately).
• Battery-Free Operation: Can supply power directly from PV array or AC grid without a connected battery.

3.2 Product Components and Ports

The inverter features a clear LCD display for real-time monitoring and various ports for connectivity.

Image: Front view of the Y&H 12KW 48V Solar Hybrid Inverter, showing the integrated LCD display and sleek design.

Image: Detailed diagram of the inverter's ports, including AC output, AC input, ON/OFF switch, PV parameters, battery parameters, CT current sensing, dry contact port, RS485/CAN communication, parallel communication, USB, Wi-Fi port, and AC input breaker.

1. AC output port
2. AC input port
3. ON/OFF rocker switch
4. Photovoltaic (PV) parameters
5. Battery parameters
6. CT current sensing for self-consumption (optional)
7. Dry contact port
8. RS485-2/CAN communication port
9. Parallel communication port (parallel module only)
10. RS485-1 communication port
11. USB communication port
12. WIFI port (optional)
13. AC input breaker
14. Grounding screw hold

3.3 LCD Display Overview

The LCD HD display screen provides real-time monitoring of the photovoltaic system's operating data.

Image: Diagram illustrating the various indicators on the inverter's LCD display, including time, PV parameters, system information, AC input parameters, screen communication, battery parameters, main menu, historical data, settings, and AC output parameters.

1. Time
2. Photovoltaic (PV) parameters
3. System information
4. AC input parameters
5. Screen communication
6. Battery parameters
7. Main
8. Historical data
9. Setting
10. Menu bar
11. AC output parameters

4. Setup and Installation

This section outlines the general steps for installing the Y&H 12KW Hybrid Inverter. Detailed wiring diagrams are provided for both single-phase and split-phase configurations.

4.1 Wiring Diagrams

Ensure all wiring is done by a certified electrician and complies with local electrical codes.

4.1.1 Split-Phase Mode Wiring

Image: Wiring diagram for the Y&H 12KW Hybrid Inverter in split-phase mode (L1+L2+N+PE), showing connections for solar panels, 48V battery bank, mains power, and household appliances. Key specifications like PV array power, MPPT voltage range, and charging currents are indicated.

In split-phase mode, the inverter provides 120V/240V AC output. The diagram illustrates connections for the PV array, 48V battery bank, mains power, and household loads. Note the dual MPPT trackers and maximum PV input power of 6000W+6000W.

4.1.2 Single-Phase Mode Wiring

Image: Wiring diagram for the Y&H 12KW Hybrid Inverter in single-phase mode (L1+N+PE), showing connections for solar panels, 48V battery bank, mains power, and household appliances. Key specifications like PV array power, MPPT voltage range, and charging currents are indicated.

For single-phase applications, the inverter provides 120V AC output. The diagram shows similar connections to the split-phase mode, adapted for single-phase loads. Ensure correct neutral and live wire connections.

4.2 Output Voltage Configuration

Image: Diagram illustrating the AC output voltage configurations for both split-phase (L1-N, L2-N, L1-L2) and single-phase (L1-N) modes, with corresponding voltage ranges and default settings.

4.3 Parallel Connection

The inverter supports parallel connection of up to 6 units, delivering up to 72kW for 120V/240V/208V systems. This allows for increased power capacity to meet diverse energy demands for both residential and commercial applications. Units can be configured to operate in single-phase, split-phase, or 3-phase modes.

5. Operating Modes

5.1 Charging Modes

The inverter offers four distinct charging modes to optimize battery replenishment based on available power sources:

• Solar Only: Prioritizes solar power for battery charging.
• Utility Priority: Prioritizes grid power for battery charging.
• Solar Priority: Uses solar power first, then utility if solar is insufficient.
• Hybrid (PV + Grid): Utilizes both solar and grid power for charging.

5.2 Load Output Working Modes

The inverter also features various load output working modes to manage power delivery to connected appliances.

Image: Visual representation of the four charging modes (Solar Priority, Solar and Utility, Utility Priority, Only Solar) and four load output working modes (Solar Priority, Solar and Utility, Utility Priority, Inverter Priority Output).

5.3 Time-Based Energy Scheduling

The inverter allows for 3 customizable charging/discharging periods. This feature enables automatic switching between grid and battery power during peak and off-peak hours, helping to reduce electricity costs. Battery preservation logic prevents deep discharge and enforces charging when necessary (BMS required for advanced control).

Image: Chart illustrating load redirection and energy supply priority based on time-of-use (TOU) rates, showing how grid, battery, and PV power are utilized during off-peak, mid-peak, and on-peak hours to optimize energy costs.

When mains electricity is inexpensive, the battery inverter can be used to carry the load and charge the battery, maximizing electricity cost savings.

6. Battery Compatibility

The Y&H Hybrid Inverter is compatible with various 48V battery types, including GEL, AGM, FLA lead-acid, and LiFePO4/Lithium-ion batteries. It supports BMS communication via RS485/CAN for advanced battery management. The maximum battery charging current is 220A.

Image: Illustration showing the inverter's compatibility with various 48V battery types (AGM, GEL, FLD, LI, SLD, USER) and its capability for battery-free operation. It also explains how the inverter can supply loads directly from PV or AC grid without a connected battery, and how a dual-trigger mechanism activates Li-ion batteries from sleep mode.

Battery-Free Operation: The inverter can supply power to loads directly from either the PV array or AC grid without requiring a connected battery. For Li-ion batteries in sleep mode, a dual-trigger mechanism activates them automatically using mains power or photovoltaic power.

7. System Structure and Applications

The Y&H 12KW Hybrid Inverter is designed for versatility, supporting both off-grid and grid-tied applications. It provides continuous power for peak demand times, blackouts, or remote locations.

Image: Diagram illustrating the system structure of the Y&H Hybrid Inverter within a household setting, showing connections to solar panels, the utility grid, a generator, and various household appliances. It highlights versatility, multi-scenario use, continuous power, and multi-input capability.

7.1 Hybrid Solar System

Hybrid solar systems combine grid-tied and off-grid solutions, ensuring continuous power supply even during grid failures. They allow for sending surplus solar energy back to the grid. These systems integrate multiple power sources, including generators, the utility grid, and solar panels.

Image: Diagram depicting a hybrid solar system setup with the Y&H inverter, showing how it integrates solar panels, battery storage, grid power, and a generator to provide uninterrupted power and allow for grid feedback.

7.2 Off-Grid Solar System

An off-grid solar system operates independently of the public grid, relying on battery storage to power your home or business. In cases where solar generation is insufficient, a generator can be used as a backup. The inverter maintains continuous function without a grid connection.

Image: Diagram illustrating an off-grid solar system setup with the Y&H inverter, showing its independence from the utility grid and reliance on solar panels and battery storage, with an optional generator for backup.

7.3 Grid-Tied Solar Power System

A grid-tied solar power system connects directly to the public utility grid. Solar panels generate electricity for immediate use, and any excess power can be fed back into the grid for net metering credits. Note that without a battery, the inverter will not function during a grid outage.

Image: Diagram showing a grid-tied solar power system with the Y&H inverter, illustrating its connection to the utility grid and how solar power is used and excess is fed back, with optional battery storage.

7.4 Wide Range of Applications

The inverter is suitable for various environments and uses:

• Solar Home Systems
• RVs and mobile applications
• Farms and outdoor power needs
• Boats
• Outdoor Camping

Image: Collage of images demonstrating various applications for the Y&H Hybrid Inverter, including solar home systems, RVs, farms, boats, and outdoor camping setups.

8. Protection Features

The Y&H 12KW Hybrid Inverter incorporates 16 layers of protection to ensure safe and reliable operation. Key protection features include:

• Over Temperature Protection
• Short Circuit Protection
• Overload Protection
• Over Current Protection
• Under Voltage Protection
• Over Voltage Protection
• Over Charge Protection

Image: Graphic illustrating the comprehensive protection features of the Y&H Hybrid Inverter, including over temperature, short circuit, overload, over current, under voltage, over voltage, and over charge protection.

Smart battery management features include 52V low-voltage recovery and 42V over-discharge cutoff to extend battery life. The pure sine wave output ensures compatibility with sensitive electronics.

9. Monitoring and Control

The Y&H Hybrid Inverter can be monitored and controlled remotely via the SmartESS App. A built-in Wi-Fi transmitter allows real-time system control from anywhere via Wi-Fi. Registration is required, and the Wi-Fi module needs to be purchased separately.

Image: Illustration showing the SmartESS App interface on a smartphone, demonstrating remote monitoring and control capabilities for the Y&H Hybrid Inverter from various locations like home, office, or store. Download links for App Store and Google Play are shown.

The app is available for download on the App Store and Google Play.

10. Specifications

11. Maintenance

Regular maintenance ensures the longevity and optimal performance of your Y&H Hybrid Inverter.

• Cleaning: Keep the inverter's ventilation openings clear of dust and debris to ensure proper airflow. Use a dry cloth for cleaning the exterior.
• Connections: Periodically check all electrical connections for tightness and signs of corrosion. Loose connections can lead to overheating or system malfunction.
• Battery Inspection: If using lead-acid batteries, check electrolyte levels and terminal conditions as per battery manufacturer guidelines. For lithium batteries, monitor BMS data via the SmartESS app.
• Environmental Conditions: Ensure the inverter is operating within its specified temperature range (-10°C to 55°C) and in a dry, well-ventilated area.
• Firmware Updates: Check the manufacturer's website or the SmartESS app for any available firmware updates to ensure your inverter has the latest features and bug fixes.

Always disconnect all power sources before performing any physical maintenance on the inverter.

12. Troubleshooting

This section provides general troubleshooting tips for common issues. For more complex problems, consult the detailed troubleshooting guide in the full product manual or contact customer support.

13. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the official Y&H website or contact their customer service department. Keep your purchase receipt and product model number (IVH-12KW-UP) handy when contacting support.

Y&H has 9 years of experience in inverter production and sales, with a professional technical team. Your satisfaction is their top priority.

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