Y&H 1400W Grid Tie Inverter Instruction Manual

1. Introduction and Overview

The Y&H 1400W Grid Tie Inverter is designed to convert direct current (DC) electricity generated by solar panels into alternating current (AC) electricity, which can then be fed into the utility grid. This inverter features Maximum Power Point Tracking (MPPT) technology for optimal energy harvesting and produces a pure sine wave output, ensuring compatibility with household appliances. It is suitable for use with 24V or 36V PV panels, with a recommended DC input voltage range of 30-45V.

Figure 1: Y&H 1400W Grid Tie Inverter with included AC power cord.

2. Safety Information

• Electrical Connections: Ensure all DC connections are secure and properly tightened to prevent loose connections and potential short circuits, which can lead to smoke emission. The inverter features an aluminum alloy casing designed to minimize fire risk.
• Grid Connection: Do not use this inverter with a bidirectional meter in your local power grid. Connecting to a bidirectional grid may cause excess power from the inverter to be fed back, potentially increasing electricity costs. For bidirectional power grids, consider using the Y&H SUN-Inverter series.
• Voltage Compatibility: Verify that the input voltage and power of your solar panels do not exceed the specified range for this inverter.
• Qualified Personnel: Installation and maintenance should only be performed by qualified personnel familiar with electrical systems and solar power.
• Ventilation: Ensure adequate ventilation around the inverter to prevent overheating.

3. Product Features

• Maximum Power Point Tracking (MPPT): The inverter's MPPT range is 30V - 39V, ensuring high efficiency (over 99%) by reacting sensitively and locking onto the maximum power point quickly.
• Pure Sine Wave Output: Provides clean and stable AC power suitable for sensitive electronics.
• Stackable Design: Features a parallel modular components design, allowing for flexible system expansion and scalability.
• Protection Features: Includes Over Current Protection, Over Temperature Protection, Reverse Polarity Protection, and Island Protection for enhanced safety and reliability.
• Aluminum Alloy Casing: Durable and designed to minimize fire risk.

4. Setup and Installation

Follow these steps for proper installation of your Y&H Grid Tie Inverter:

1. Identify DC Input Terminals: Locate the positive (+) and negative (-) DC input terminals on the inverter. These are typically color-coded (red for positive, black for negative) and may have fuse holders.

Figure 2: DC Input Terminals and Fuses.
2. Connect DC Input Source: Connect your solar panel(s) or battery bank to the DC input terminals. Ensure the Vmp (Maximum Power Voltage) of your solar panel is within the inverter's MPPT range (30V-39V) and the Voc (Open Circuit Voltage) is within 34-46V. For 24V solar panels, the Vmp must be higher than 26V. If using multiple panels, connect them in parallel. If using a battery, a 36V battery bank is recommended for testing purposes, as 24V batteries are not compatible.


Figure 3: Accepted DC Input Sources (Solar Panel and Battery Bank).

3. Connect AC Output: Connect the inverter's AC output to a standard household outlet using the provided AC power cord. Ensure the outlet is part of a stable utility grid.


Figure 4: AC Output Connection to Grid.

4. Power On: Once all connections are secure, turn on the inverter's power switch. The blue LED indicator should light up, indicating operation.

Figure 5: AC Output Port and Power Switch.
5. Observe Operation: The inverter will begin converting DC power to AC power and feeding it into your home's electrical system.

5. Operating Instructions

Once installed and powered on, the inverter operates automatically. It will continuously track the maximum power point of your solar panels to optimize energy production and feed AC power into your grid. The blue LED indicator confirms active operation.

• Monitoring: You can monitor the inverter's performance using compatible energy monitoring devices (not included).
• Shutdown: To shut down the system, first disconnect the AC power cord from the grid, then disconnect the DC input from the solar panels or battery.

6. Maintenance

Regular maintenance helps ensure the longevity and optimal performance of your inverter:

• Cleaning: Periodically clean the exterior of the inverter to prevent dust buildup, especially around the cooling fan and heat sinks. Use a soft, dry cloth.
• Connection Checks: Annually inspect all electrical connections (DC input and AC output) to ensure they remain tight and free from corrosion.
• Ventilation: Ensure that the inverter's ventilation openings are not obstructed.

7. Troubleshooting

If the inverter is not operating as expected, consider the following:

• No Power Output:
  • Check if the DC input voltage from your solar panels is within the specified operating range (30-45V).
  • Verify that the AC power cord is securely plugged into a live grid outlet.
  • Ensure the inverter's power switch is in the 'ON' position.
  • Inspect the fuses on the DC input side (Figure 2). Replace if blown.
• Low Power Output:
  • Confirm that your solar panels are receiving adequate sunlight and are not shaded.
  • Check the Vmp of your solar panels to ensure it falls within the inverter's optimal MPPT range.
  • Ensure all connections are secure and free from resistance.
• Overheating:
  • Ensure the inverter is installed in a well-ventilated area.
  • Clear any obstructions from the cooling fan.

For persistent issues, refer to the Warranty and Support section for contact information.

8. Specifications

9. Warranty and Support

Y&H provides a 1-year warranty for this product, along with a 30-day free return policy. If you encounter any product problems or have questions regarding installation, operation, or troubleshooting, please contact Y&H customer support. Your satisfaction is a top priority, and the technical team is available to assist you.

For support, please refer to the contact information provided with your purchase or visit the official Y&H website.