1. Product Overview
This document serves as a comprehensive guide for the Y&H 3.6KW 4000VA Hybrid Solar Inverter. It combines the functionalities of an inverter, solar charger, and battery charger to provide reliable, uninterruptible power. The device features a user-friendly LCD display and configurable settings to adapt to various applications.
Key features include:
- Pure sine wave solar inverter (on/off Grid)
- WIFI & GPRS available for IOS and Android (optional module)
- Operation without battery support
- One-key restoration to factory settings
- Built-in lithium battery automatic activation
- Built-in MPPT 120A Solar Charger
- High PV input voltage range (90~450VDC)
- Built-in anti-dusk kit for harsh environments
- Smart battery charge design to optimize battery life
- 110V/120V AC Dual output
- Comprehensive 360° protection (Short Circuit, Over-Load, Over Charge, Over Current, Backfill, Over Voltage, Under Voltage, Over-Temperature)
2. Safety Precautions
WARNING: Before installing or using the inverter, please read all instructions and cautionary markings on the unit and in this manual.
- Ensure all wiring is performed by qualified personnel.
- Do not attempt to disassemble the unit. There are no user-serviceable parts inside.
- Keep the inverter away from flammable materials and ensure adequate ventilation.
- Ensure proper grounding of the unit.
- Always disconnect all power sources (PV, AC, Battery) before performing any maintenance or wiring.
- Do not connect AC input and PV input simultaneously during initial setup or troubleshooting.
3. Installation and Setup
3.1 Unpacking and Inspection
Before installation, inspect the unit for any damage. Ensure all components are present as per the packing list (not provided, assume standard inverter accessories).
3.2 Installation Environment
- Mount the inverter in a well-ventilated area to prevent overheating.
- Avoid direct sunlight, moisture, and dust.
- Ensure the ambient temperature is within the operating range specified in the technical specifications.
- Maintain sufficient clearance around the unit for proper airflow.
3.3 Port Introduction
Familiarize yourself with the various ports and indicators on the inverter:
- LCD display
- Status indicator
- Charging indicator
- Fault indicator
- Function buttons
- AC input
- Main output
- Second output
- Battery communication / RS-485 port
- WIFI communication / RS-232 port
- Battery input
- PV input
3.4 Wiring and Connections
Refer to the detailed wiring diagram below for correct connections. All wiring should comply with local electrical codes.
Wiring Guidelines:
- PV Input: Connect solar panels to the PV input. Max PV Power: 4200W. Max PV Open Circuit Voltage: 500VDC. PV MPPT Voltage Range: 60V-500VDC. Start-up voltage (initial charging): >90V. Recommended to connect solar panels in series.
- Battery Connection: Connect a 24V battery bank. Compatible types include Lead Acid (Seal, AGM, Gel, Flooded) and Lithium battery. Wire Size: 2AWG. Cable: 25mm².
- AC Input (Mains/Generator): Connect your AC utility grid or generator to the AC input. Max AC Input Voltage: 120VAC. Suggested cable: 12AWG. Recommended breaker: 32A.
- Main Out: Connect primary loads to the Main Out. AC Output Power: 3600W. AC Output Voltage: 110/120Vac. Peak power: 7200W. Suggested cable: 12AWG. Recommended breaker: 32A.
- Second Out: Connect secondary loads to the Second Out.
- Grounding: Ensure the inverter is properly grounded.
IMPORTANT: Do not turn on each input (AC and PV) at the same time during initial connection. It is recommended to allow the inverter to stabilize for 3 minutes after each connection.
3.5 Startup and Shutdown Sequence
Follow these sequences to ensure safe operation and prevent damage to the inverter or connected devices:
Inverter Startup Sequence:
- Connect Battery
- Connect AC input or PV input (do not connect both simultaneously during startup)
- Connect Load
Inverter Shutdown Sequence:
- Disconnect Load
- Disconnect AC input or PV input
- Turn off the inverter
- Disconnect Battery
4. Operating Instructions
4.1 LCD Display and Function Buttons
The 6.25-inch LCD display provides real-time system data and operating status. Use the touchable function buttons (5) to navigate menus and configure settings.
4.2 Operating Modes
The inverter supports various charging and discharge modes to maximize energy use and reduce electricity bills:
- Charging Modes:
- CSO Solar First: Prioritizes solar charging.
- Utility First: Prioritizes utility grid charging.
- SNU Solar and Utility (default): Uses both solar and utility for charging.
- OSO Only Solar: Charges only from solar power.
- Discharge Modes:
- SUB Solar First (Default): Prioritizes solar power for loads.
- USB Utility First: Prioritizes utility power for loads.
- SBU Priority: Prioritizes solar, then battery, then utility for loads.
You can configure AC/Battery input priority via the LCD settings.
4.3 Dual Load Output Power
The inverter features dual AC outputs (Main Out and Second Out) for flexible load management.
4.4 Battery Compatibility and Management
The inverter is compatible with various 24V battery types, including AGM, Gel, Lead Acid, Lithium Ions, and Lithium Iron Phosphate batteries. It includes built-in lithium activation and comprehensive battery protection functions.
The inverter also supports a "no-battery operation" mode, allowing it to function directly from solar or AC input without a connected battery.
4.5 Monitoring and Control (Optional)
The inverter supports WIFI and GPRS monitoring functions, allowing you to monitor and control the system via a smartphone app (available for iOS and Android). The Wi-Fi/GPRS data acquisition module needs to be purchased separately.
5. Maintenance
- Regular Cleaning: Keep the inverter's exterior clean and free from dust. Ensure ventilation openings are not blocked.
- Connection Check: Periodically check all electrical connections for tightness and signs of corrosion.
- Battery Inspection: If using batteries, regularly inspect them for any signs of damage, leakage, or swelling. Ensure battery terminals are clean.
- Firmware Updates: Check the manufacturer's website for any available firmware updates to ensure optimal performance and new features.
- Environmental Check: Ensure the installation environment remains within recommended temperature and humidity ranges.
6. Troubleshooting
This section provides guidance on common issues. For complex problems, contact technical support.
6.1 Common Issues and Solutions
| Problem | Possible Cause | Solution |
|---|---|---|
| Inverter does not turn on | Incorrect startup sequence, no battery power, no AC/PV input. |
|
| Main output stops working | Battery voltage too low. |
|
| Overload protection triggered | Connected loads exceed inverter capacity. |
|
| Over-temperature warning | Insufficient ventilation, high ambient temperature. |
|
| Fault indicator active | Internal fault, wiring error, or protection triggered. |
|
6.2 Comprehensive Protection Features
The inverter is equipped with multiple protection mechanisms:
- Short Circuit Protection
- Over-Load Protection
- Over Charge Protection
- Over Current Protection
- Backfill Protection
- Over Voltage Protection
- Under Voltage Protection
- Over-Temperature Protection
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | NM-ECO-3.6KW |
| Rated Power | 3.6KW / 4000VA |
| Battery Voltage | 24VDC |
| PV Input Voltage Range | 60-500VDC (MPPT Range) |
| Max PV Open Circuit Voltage | 500VDC |
| Max PV Array Power | 4200W |
| MPPT Solar Charger Current | 120A |
| AC Output Voltage | 110/120VAC |
| Output Frequency | 50Hz/60Hz |
| Output Type | SINGLE (Pure Sine Wave) |
| Peak Power | 7200W |
| Size (L*W*H) | 50.5*42.5*8.5cm |
| Weight | 9.7KG |
| Is Smart Device | Yes (with optional WiFi/GPRS module) |
| Certification | CE |
8. Warranty and Support
8.1 Warranty Information
This Y&H Hybrid Solar Inverter comes with a 12-month warranty from the date of purchase. The warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.
The warranty does not cover damage caused by:
- Improper installation or wiring.
- Misuse, abuse, or neglect.
- Unauthorized modifications or repairs.
- Natural disasters or external forces.
8.2 Technical Support
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact your vendor or the manufacturer's customer service. Provide your product model number (NM-ECO-3.6KW) and a detailed description of the issue.
9. User Tips
- Optimize Battery Life: Utilize the smart battery charge design and ensure proper battery type selection in the inverter settings for optimal battery performance and longevity.
- Battery-Free Operation: If you don't have a battery or prefer to run directly from solar/AC, remember this inverter supports battery-free operation, offering flexibility in your power setup.
- Remote Monitoring: Consider purchasing the optional WiFi/GPRS module for convenient remote monitoring and control of your inverter via the SmartESS app, allowing you to keep track of your system's performance from anywhere.
- Dual Output Strategy: Plan your loads carefully between the Main Out and Second Out. If battery voltage drops, the Main Out will cease operation, but the Second Out can continue, which can be useful for critical, low-power devices.
- Cold Restart: In case of unexpected behavior or a fault, performing a "cold restart" (disconnecting all power sources, waiting a few minutes, then following the correct startup sequence) can often resolve minor glitches.
