1. Introduction
This document provides comprehensive instructions for the installation, operation, and maintenance of your Y&H 3.6KW Hybrid Solar Inverter. This multi-function inverter/charger combines the capabilities of an inverter, solar charger, and battery charger to deliver uninterrupted power support. It features a user-friendly LCD display and accessible buttons for configuring settings such as battery charging current, AC/solar charger priority, and acceptable input voltage for various applications.
The inverter is designed for both on-grid and off-grid solar systems, offering a pure sine wave output to protect your home appliances.
2. Important Safety Instructions
- Do not turn on each input (AC, PV) at the same time. It is recommended to allow the inverter to stabilize for at least 3 minutes after connecting one input before connecting another.
- Ensure all connections are secure and correctly polarized before operation.
- Only qualified personnel should perform installation and maintenance.
- Keep the inverter in a well-ventilated area, away from flammable materials and moisture.
- Always follow the specified startup and shutdown sequences to prevent damage to the inverter or connected equipment.
3. Product Overview
Familiarize yourself with the inverter's components and ports:
This diagram illustrates the various ports and indicators on the Y&H Hybrid Solar Inverter, including the LCD display, status indicators, function buttons, and connection terminals.
- 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
4. Technical Specifications
Below are the key technical specifications for the Y&H 3.6KW Hybrid Solar Inverter:
This image provides a detailed overview of the inverter's wiring connections and critical technical parameters, including PV input, AC output, and battery specifications.
| Feature | Specification |
|---|---|
| Model Number | NM-ECO-LV |
| Rated Output Power | 3.6KW |
| Battery Voltage | 24VDC |
| Max PV Voltage | 500V |
| PV MPPT Voltage Range | 60V - 500VDC |
| Start-up Voltage | >90V |
| Max Charging Current (AC+Solar) | 120A |
| AC Voltage | 110VAC |
| Max AC Input Voltage | 120VAC |
| AC Output Power | 3600W |
| Peak Power | 7200W |
| Output Waveform | Pure Sine Wave |
| Output Frequency | 50Hz/60Hz |
| Output Current | 140A |
| Suggested PV Cable | 12AWG |
| Suggested AC Output Cable | 12AWG |
| Suggested Battery Cable | 2AWG (25mm²) |
| Suggested Breaker (AC Output) | 32A |
| Size | 50.5 x 42.5 x 8.5 cm |
| Weight | 9.65KG |
| Is Smart Device | Yes |
| Certification | CE |
5. Installation
Proper installation is crucial for the safe and efficient operation of your hybrid solar inverter. Refer to the wiring diagram below for connection details.
This diagram illustrates the connections for PV input, battery, AC input (generator/mains), main output, and second output. Ensure correct cable gauges and polarity.
5.1. Wiring Guidelines
- PV Input: Connect solar panels in series to achieve the recommended voltage range (60V-500VDC). Use 12AWG cable.
- Battery Connection: Connect a 24V battery bank (AGM, Gel, Lead Acid, Lithium, SLD) using 2AWG (25mm²) cables. Ensure correct polarity.
- AC Input: Connect to a generator or mains power supply (110VAC/120VAC). Use 12AWG cable.
- AC Output (Main & Second): Connect your loads to the main and second output ports. Use 12AWG cable for AC output and a 32A breaker for protection.
- Grounding: Ensure the inverter is properly grounded using a 25mm² earth wire.
5.2. Inverter Startup Sequence
1. Connect Battery
2. Connect AC input or PV input (wait 3 minutes for stabilization)
3. Connect Load
6. Operation
6.1. Inverter Shutdown Sequence
1. Disconnect Load
2. Disconnect AC input or PV input
3. Turn off the inverter
4. Disconnect Battery
6.2. Dual Load Output Functionality
The inverter features dual AC outputs: a main output and a second output. This allows for prioritized power distribution.
This diagram shows that the main output port will stop working if the battery voltage falls below a set range (20V - 23V). In such cases, only the second output port will continue to function.
When the battery voltage falls below the user-defined set range (typically 20V - 23V for a 24V system), the main output port will automatically stop supplying power. Only the second output port will remain active, allowing you to power essential loads.
6.3. Charging and Discharge Modes
The inverter supports various charging and discharge modes to optimize energy use and reduce electricity bills.
This image details the four available charging modes (Solar First, Utility First, Solar and Utility, Only Solar) and three discharge modes (Solar First, Utility First, SBU Priority).
Charging Modes:
- CSO Solar First: Prioritizes solar power for charging.
- Utility First: Prioritizes utility power for charging.
- SNU Solar and Utility (Default): Uses both solar and utility power for charging.
- OSO Only Solar: Charges exclusively from solar power.
Discharge Modes:
- SUB Solar First (Default): Prioritizes solar power for discharging to loads.
- USB Utility First: Prioritizes utility power for discharging to loads.
- SBU Priority: Prioritizes battery discharge, then utility, then solar.
6.4. Battery Compatibility and Management
The inverter is compatible with a variety of 24V batteries, including AGM, Gel, Lead Acid, Lithium-ion, and Lithium Iron Phosphate batteries. It supports battery-free operation and includes built-in lithium battery activation and comprehensive protection functions.
This image highlights the inverter's compatibility with various battery types (AGM, GEL, FLD, LI, SLD) and its ability to operate without a battery. For Lithium batteries, BMS communication must be PylonTech.
7. Monitoring and Control
The Y&H Hybrid Solar Inverter can be monitored and controlled via the SmartESS App, available on both the App Store and Google Play.
This image displays the mobile application for monitoring system data. Note that the Wi-Fi/GPRS data acquisition module is optional and needs to be purchased separately for remote monitoring capabilities.
To enable remote monitoring and control, an optional Wi-Fi/GPRS data acquisition module needs to be purchased separately and connected to the inverter's WIFI communication/RS-232 port.
8. Maintenance
- Regular Cleaning: Keep the inverter's ventilation openings clear of dust and debris to ensure proper airflow and cooling. The inverter features a built-in anti-dusk kit for harsh environments, but regular external cleaning is still recommended.
- Connection Checks: Periodically inspect all wiring connections for tightness and signs of corrosion.
- Battery Health: Monitor battery voltage and performance. The inverter's smart battery charge design helps optimize battery life, but external battery maintenance (e.g., checking electrolyte levels for flooded batteries) may be required depending on battery type.
- Firmware Updates: Check the manufacturer's website or the SmartESS app for any available firmware updates to ensure optimal performance and access to new features.
9. Troubleshooting
The Y&H Hybrid Solar Inverter is equipped with comprehensive 360° protection features to ensure safe and reliable operation. If an issue occurs, the fault indicator (4) on the product overview will illuminate, and the LCD display will show an error code.
This image highlights the various protection mechanisms built into the inverter, including safeguards against short circuits, over-load, over-charge, over-current, backfill, over-voltage, under-voltage, and over-temperature.
Common protection triggers include:
- Short Circuit Protection: Automatically shuts down in case of a short circuit.
- Over-Load Protection: Activates if the connected load exceeds the inverter's capacity. Reduce load and restart.
- Over Charge Protection: Prevents battery overcharging.
- Over Current Protection: Protects against excessive current draw.
- Backfill Protection: Safeguards against reverse current flow.
- Over Voltage Protection: Protects against input or output voltage exceeding safe limits.
- Under Voltage Protection: Activates if battery voltage drops too low. Recharge battery.
- Over-Temperature Protection: Shuts down if internal temperature becomes too high. Ensure adequate ventilation.
For specific error codes and detailed troubleshooting steps, please refer to the full product manual (if available) or contact customer support.
10. User Tips
Based on available information, no specific user tips from reviews or Q&A were found for this product. Always ensure to follow the manufacturer's guidelines for optimal performance and longevity of your inverter.
11. Warranty and Support
The Y&H 3.6KW Hybrid Solar Inverter comes with a 24 Months Warranty from the date of purchase. Please retain your proof of purchase for warranty claims.
For technical support, warranty claims, or any other inquiries, please contact Y&H customer service through their official channels.
