Y&H 10KW Hybrid Solar Inverter User Manual

1. Introduction

This manual provides essential information for the safe and efficient operation of your Y&H 10KW Hybrid Solar Inverter, Model SPI-10K-UP. This advanced inverter is designed for both off-grid and on-grid solar systems, supporting single-phase, split-phase, and three-phase configurations with 110V/220V AC output. It features dual MPPT solar charging, compatibility with various battery types, and the ability to operate without batteries under specific conditions. Please read this manual thoroughly before installation and use.

Figure 1: Y&H 10KW Hybrid Solar Inverter (Model SPI-10K-UP)

2. Safety Information

Please observe the following safety precautions to prevent injury and damage to the inverter:

• All electrical installations must be performed by qualified personnel in accordance with local electrical codes.
• Ensure the inverter is properly grounded.
• Do not attempt to open or repair the inverter yourself. Contact qualified service personnel.
• Keep the inverter away from flammable materials, moisture, and direct sunlight.
• Ensure adequate ventilation around the inverter to prevent overheating.
• Always disconnect all power sources (PV, battery, and AC utility) before performing any maintenance or wiring.
• The open circuit voltage of PV panels in series connection must be below 500V. Over-voltage will cause damage to the inverter and is not covered by warranty.

3. Product Overview

3.1 Key Features

• Pure Sine Wave inverter with up to 10000W output power.
• 120/240Vac dual voltage output, supporting single-phase or split-phase devices.
• Fast switching time of 10ms.
• Compatible with 48V lithium-ion and lead-acid batteries, with user-defined settings.
• Max PV charging current up to 200A.
• Max AC charging current up to 120A.
• Max hybrid charging current up to 200A.
• Wide AC input voltage range: 90~140Vac.
• Wide PV input voltage range: 125~500Vdc.
• Dual MPPT trackers with 99.9% efficiency.
• Higher input DC current up to 22A in a single circuit.
• Energy saving mode function to reduce no-load energy losses.
• Multiple communication interfaces: RS485, CAN, USB, Dry contact.
• Durable finish with high anti-corrosion properties.
• Effective forced air cooling for stable operation.
• Supports parallel operation of up to 6 units.

3.2 Components and Ports

The inverter features an intuitive interface and various connection ports. Refer to the diagram below for identification:

Figure 2: Inverter Port Introduction

1. LCD screen: Displays operational status and settings.
2. LED Indicators: Provide quick status updates.
3. Touchable key: For navigating menus and adjusting settings.
4. ON/OFF Rocker Switch: Main power switch for the inverter.
5. PV INPUT (1/1): Connection terminals for solar panel arrays.
6. BAT INPUT (+): Positive terminal for battery connection.
7. BAT INPUT (-): Negative terminal for battery connection.
8. Dry contact: For external control or signaling.
9. CAN/RS485-2 port: Communication interface.
10. RS485-1 port: Communication interface.
11. USB-B port: For data communication and firmware updates.
12. Grounding Screw: Essential for safety grounding.
13. AC OUT (L+L+N): AC output terminals for connecting loads.
14. AC IN (L+L+N): AC input terminals for utility grid connection.
15. AC INPUT breaker: Circuit breaker for AC input protection.

4. Installation and Setup

4.1 Mounting the Inverter

• Choose a dry, well-ventilated area, away from direct sunlight and heat sources.
• Ensure sufficient clearance around the inverter for proper airflow and cooling.
• Mount the inverter vertically on a sturdy wall using appropriate fasteners.

4.2 Wiring Connections

All wiring must be done by a qualified electrician. Refer to the wiring diagrams for correct connections.

Figure 3: Split-Phase and Single-Phase Wiring Diagrams

• PV Input: Connect solar panels to the PV INPUT terminals. Ensure the total open circuit voltage of the PV array in series connection is below 500Vdc. Max PV Array Power is 11KW, with a maximum input current of 22A per MPPT tracker. PV Cable Diameter: 10 AWG.
• Battery Connection: Connect the 48V battery bank to the BAT INPUT terminals. The inverter is compatible with Lead-acid (AGM, GEL, FLD, SLD) and Lithium batteries. Max battery charging current is 200A.
• AC Input (Utility Grid): Connect the utility grid to the AC IN terminals. Input Voltage Range: 90-140Vac. Frequency Range: 50/60Hz. Bypass Overload Current: 60A. AC Cable Diameter: 6 AWG.
• AC Output (Loads): Connect household appliances to the AC OUT terminals. Rated Output Power: 10000W. Rated AC Frequency: 50/60Hz. Rated Output Voltage: 120/240Vac (split/single phase). Load Capacity of Motors: 6HP.
• Grounding: Ensure the inverter is properly grounded using the Grounding Screw.

Notice: The open circuit voltage of PV panel in series connection must be below 500V. Over-voltage will cause damage to the inverter. Damage caused by improper configuration is not covered by warranty.

4.3 Battery Compatibility and Batteryless Operation

The inverter supports 48V Lead-acid (AGM, GEL, FLD, SLD) and Lithium batteries. It can also operate without batteries. For batteryless operation, the voltage of the solar module should be more than 200Vdc.

Figure 4: Battery Compatibility

4.4 Parallel Operation

The inverter supports parallel operation of up to 6 units to increase total system capacity. Refer to the diagram for parallel wiring connections.

Figure 5: Parallel Inverter Wiring Diagram

4.5 Output Phase Mode and Voltage Configuration

Users can change the output phase mode and output voltage via the setup menu. Please refer to the inverter's detailed setup instructions (typically Chapter 5.2 in the full manual) for parameter adjustments.

• Output phase mode (Parameter 39): Set to '180' for split-phase, '0' for single-phase.
• Output voltage (Parameter 38): Can be set from 100V to 120V.

Figure 6: Output Phase Mode Configuration

5. Operation

5.1 Powering On/Off

• To power on: Ensure all connections are secure. Turn on the AC INPUT breaker, then the ON/OFF Rocker Switch.
• To power off: Turn off the ON/OFF Rocker Switch, then the AC INPUT breaker. Disconnect PV and battery inputs if performing maintenance.

5.2 Charging and Discharge Modes

The inverter offers flexible charging and discharge modes to optimize energy use:

• Four Charging Modes: Solar Priority, Solar and Utility, Utility Priority, Only Solar.
• Three Discharge Modes: Inverter Priority Output (prioritizes solar/battery), Utility Priority Output (prioritizes grid), and SBU Priority (Solar-Battery-Utility).

Figure 7: Charging and Discharge Modes

5.3 Timed Slot Functions

The inverter allows for user-defined timed periods for utility charging/carrying and battery discharge:

• Timed slot utility charge/carry function: With 3 definable periods, users can freely set the mains charging/carrying time within the range of 00:00 to 23:59. During this period, if PV energy is available, PV energy will be used first. If PV energy is not available or insufficient, utility energy will be used as a supplement.
• Time slot battery discharge function: There are 3 definable time periods. Users can freely set the battery discharge time within the range of 00:00 to 23:59. During the user-defined time period, the inverter will prioritize the battery inverter to take up the load, and when the battery power is insufficient, the inverter will automatically switch to the utility power supply to ensure stability.

Figure 8: Timed Slot Utility Charge/Carry and Battery Discharge Functions

5.4 Wi-Fi Communication

The inverter supports Wi-Fi communication for remote monitoring and control via a mobile application. A Wi-Fi/GPRS data acquisition module needs to be purchased separately. Download the app from the App Store or Google Play.

Figure 9: Wi-Fi Communication Setup

6. Maintenance

• Regular Inspection: Periodically check all wiring connections for tightness and signs of corrosion.
• Cleaning: Keep the inverter's exterior clean and free from dust. Use a dry cloth; do not use liquids or abrasive cleaners. Ensure ventilation openings are clear.
• Environmental Check: Verify that the operating environment remains within specified temperature and humidity ranges.
• Firmware Updates: Check the manufacturer's website or app for available firmware updates to ensure optimal performance and new features.

7. Troubleshooting

The Y&H Hybrid Solar Inverter is equipped with 14 layers of SmartProtect, providing comprehensive protection against various electrical issues. If an issue occurs, the LCD screen or LED indicators may display an error code or status. Refer to the full product manual for specific error code definitions and troubleshooting steps.

Figure 10: SmartProtect Features

Common issues and general advice:

• No Power: Check all circuit breakers (AC input, battery, PV) and ensure they are in the 'ON' position. Verify battery connections and voltage.
• Low Output Power: Check PV array for shading or damage. Ensure battery charge level is adequate.
• Overload Warning: Reduce the connected load. The inverter has protection against inverter overload and bypass over-current.
• Over-temperature Warning: Ensure adequate ventilation. Clean any dust from the inverter's cooling fins.
• PV Input Overvoltage: Immediately disconnect PV input. Recheck PV string configuration to ensure open circuit voltage is below 500V.
• Communication Issues: Verify Wi-Fi module connection and network status. Check USB/RS485/CAN cable connections.

If the problem persists, contact Y&H customer support for assistance.

8. Specifications

9. User Tips

• Optimize PV Array: Ensure your PV array is configured to maximize output within the inverter's MPPT voltage range (125-500Vdc) for best efficiency.
• Battery Management: If using batteries, regularly monitor their state of charge and health via the inverter's display or the mobile app. Proper battery care extends their lifespan.
• Energy Saving Mode: Utilize the energy saving mode to reduce power consumption during periods of low load, especially overnight, to minimize no-load energy losses.
• Remote Monitoring: Consider purchasing the optional Wi-Fi module for remote monitoring and control, which can greatly enhance convenience and system management.
• Load Balancing: For split-phase systems, try to balance loads across the two output phases (L1 and L2) to ensure optimal performance and prevent overloading one side.

10. Warranty and Support

For warranty information, technical support, or service requests, please contact Y&H Official Store customer service. Keep your purchase receipt and product model number (SPI-10K-UP) handy when contacting support.