ECGSOLAX ECG-LVM12K-SP Hybrid Solar Inverter User Manual

1. Introduction

The ECGSOLAX ECG-LVM12K-SP is a high-efficiency 12KW 48V Hybrid Solar Inverter designed for advanced energy management. It integrates PV charging, grid charging, battery inverter output, and grid bypass functions, enabling intelligent and efficient utilization of solar power, energy storage, grid power, and connected loads. This inverter supports both split-phase (120V/240V) and single-phase output, features dual MPPT chargers, and offers parallel capability for up to 6 units. With built-in WiFi and Bluetooth, it provides comprehensive monitoring and control options.

Figure 1: ECGSOLAX ECG-LVM12K-SP Hybrid Solar Inverter

2. Safety Information

WARNING: Please read and understand all instructions and warnings in this manual before installing, operating, or maintaining this inverter. Failure to follow these instructions may result in electric shock, fire, severe injury, or death.

• All electrical installations must be performed by qualified personnel in accordance with local electrical codes and standards.
• Ensure the inverter is properly grounded.
• Do not attempt to open or repair the inverter. There are no user-serviceable parts inside.
• Disconnect all power sources (PV, battery, AC input) before performing any maintenance or wiring.
• The inverter complies with safety standards including UL STD. 1741.
• This device incorporates comprehensive protection features including PV overvoltage/overcurrent, battery overcharge/over-discharge, output overload/short circuit, over-temperature, and reverse current protection.

3. Product Features

• High-Efficiency Hybrid Energy Storage: Integrates PV charging, grid charging, battery inverter output, and grid bypass functions for intelligent energy management.
• Flexible Battery Compatibility: Supports lithium-ion batteries (LiFePO4, NCM) and various lead-acid batteries (sealed, flooded, gel) with user-customizable parameters.
• High Power Output: 12kW rated power and 24kW peak power (starting capability), capable of supporting up to 6HP motor loads.
• Dual MPPT PV Input: Two independent PV inputs, each with up to 22A current and 99.9% MPPT efficiency for maximum solar energy harvesting.
• Split-Phase/Single-Phase Selectable Output: Default split-phase output (L1/L2/N, 120V/240V), configurable to single-phase output. Output voltage adjustable from 100–130V.
• Smart Touchscreen & Monitoring: Capacitive smart touchscreen with menu-driven operation for real-time data, history, and event logs.
• Multiple Communication Options: Built-in Bluetooth, WiFi, RS485, CAN, and USB interfaces for mobile app (EnerWise) and cloud platform connectivity.
• Parallel Expansion Capability: Supports parallel connection of up to 6 units for split-phase or three-phase system expansion.
• High Reliability and Safety: Comprehensive protection features and compliance with UL STD. 1741.
• Intelligence and Ease of Use: Four charging modes (PV Only, Grid Priority, PV Priority, Hybrid Charging), UPS functionality (10ms switching time), energy-saving mode, and extensive event logging.
• System Flexibility: Supports both off-grid and grid-tied applications (subject to local regulations), extensive battery parameter settings, and dry contact for remote generator control.
• Powerful Performance: High 200A PV charging current and 100A grid charging current, with up to 92% battery inverter efficiency (max) and 99.9% MPPT efficiency.

4. Components and Ports

Familiarize yourself with the inverter's components and connection points as shown in the diagram below:

Figure 2: Inverter Components and Ports

1. Capacitive touchscreen
2. LED indicator
3. Terminal protective cover
4. ON/OFF boat type switch
5. Photovoltaic input (PV1/PV2)
6. Battery port (positive)
7. Battery port (negative)
8. Dry contacts points
9. CAN/RS485-2 port
10. RS485-1 port
11. USB-B port
12. Grounding screws
13. AC output port
14. AC input port
15. Parallel communication port

5. Installation

Proper installation is crucial for the safe and efficient operation of your ECGSOLAX inverter. It is highly recommended that installation be performed by a certified electrician or solar professional.

5.1 Mounting

• Mount the inverter vertically on a solid surface.
• Ensure adequate clearance around the inverter for proper ventilation.
• Avoid mounting in direct sunlight, high humidity, or dusty environments.
• The installation location should be easily accessible for maintenance.

5.2 Wiring

All wiring must comply with national and local electrical codes. Ensure all connections are secure and properly insulated.

• Grounding: Connect the grounding screw (12) to a reliable earth ground.
• Battery Connection: Connect the battery positive and negative terminals to the corresponding battery ports (6, 7). Ensure correct polarity.
• PV Connection: Connect the solar panel strings to the PV inputs (5). Observe voltage and current limits.
• AC Input/Output: Connect the AC input (14) from the utility grid or generator and the AC output (13) to your loads.
• Parallel Communication: If installing multiple units, connect the parallel communication ports (15) as per the parallel wiring diagrams.

IMPORTANT: Disconnect all power sources before making any wiring connections.

6. Wiring Diagrams

Refer to the following diagrams for typical wiring configurations. Always consult a qualified professional for specific system design and installation.

6.1 Split-Phase and Single-Phase Modes

Figure 3: Split-Phase and Single-Phase Wiring. Note: The open-circuit voltage of serially-connected photovoltaic panels must be lower than 500V to prevent overvoltage damage to the inverter.

6.2 Three-Phase Parallel and Battery Operation

Figure 4: Three-Phase Parallel (A:1+1, B:1+1+1, C:2+2+2) and Operation with Battery Connected

6.3 Parallel Capability

Figure 5: Parallel Capability up to 6 units, achieving a maximum output power of 72000W.

6.4 PV Connection Guidelines

Figure 6: PV Connection Diagram and Parameters

When choosing the right PV module, note the following parameters:

1. The open circuit (Voc) voltage of the photovoltaic module does not exceed the voltage of the open circuit of the maximum inverter photoelectric matrix.
2. The open circuit (Voc) voltage of the photovoltaic module should be higher, and the minimum voltage of the battery should be higher.

7. Operation

The inverter features a capacitive touchscreen for easy configuration and monitoring.

7.1 Initial Startup

1. Ensure all wiring connections are correct and secure.
2. Turn on the battery breaker, then the PV array breaker.
3. Finally, turn on the AC input breaker (if connected to grid/generator) and the AC output breaker.
4. Press the ON/OFF switch on the inverter. The touchscreen will illuminate, and the system will begin its startup sequence.

7.2 Operating Modes

The inverter offers four charging modes and various operational settings:

• PV Only: Charges batteries solely from solar power.
• Grid Priority: Prioritizes grid power for charging and loads, using PV as a secondary source.
• PV Priority: Prioritizes solar power for charging and loads, using grid as a secondary source.
• Hybrid Charging: Combines PV and grid charging based on configurable settings.

These modes, along with scheduled charging/discharging functions, can be configured via the touchscreen to optimize energy strategies.

7.3 UPS Functionality

The inverter provides Uninterruptible Power Supply (UPS) functionality with a rapid 10ms switching time, ensuring continuous power for critical loads during grid outages.

7.4 Energy-Saving Mode

Activate the energy-saving mode to reduce no-load power consumption, enhancing overall system efficiency.

7.5 Monitoring and Event Logs

The touchscreen allows real-time viewing of detailed system data, historical performance, and event logs. The inverter stores 256 event logs and 1,024 days of historical data to aid in fault diagnosis and system analysis.

Figure 7: Pure Sine Wave Output for various household appliances

8. Monitoring and Communication

The ECGSOLAX inverter is equipped with multiple communication interfaces for convenient monitoring and management.

8.1 Wireless Connectivity

• Built-in Bluetooth: For local connection and configuration via a mobile device.
• Built-in WiFi: For remote monitoring and management through the EnerWise mobile app and cloud platform.

Figure 8: Built-in Bluetooth and WiFi for App Monitoring

8.2 Wired Communication

• RS485 and CAN Ports: For advanced system integration and communication with other devices.
• USB Interface: For local data download and firmware updates.
• Dry Contact Port: Allows remote generator start/stop control, enhancing system backup redundancy.

9. Maintenance

Regular maintenance ensures the longevity and optimal performance of your inverter.

• Cleaning: Periodically clean the exterior of the inverter and ensure ventilation openings are free from dust and debris. Use a dry, soft cloth.
• Inspection: Regularly inspect all wiring connections for tightness and signs of wear or damage. Check for any unusual noises or smells.
• Environment: Ensure the inverter's 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 access to new features.

WARNING: Always disconnect all power sources before performing any cleaning or inspection.

10. Troubleshooting

This section provides guidance on common issues. For complex problems, contact technical support.

10.1 Common Issues and Solutions

10.2 Protection Functions

Figure 9: Multi-Protection Functions for safer and more reliable use

The inverter is equipped with multiple protection functions including Short-circuit Protection, Surge Protection, Overload Protection, Over-Temp Protection, Low Voltage Protection, and High Voltage Protection.

11. Specifications

12. User Tips

• Regularly check the touchscreen for event logs to preemptively identify and address any potential issues.
• Utilize the mobile app (EnerWise) for convenient remote monitoring of system performance and energy statistics.
• Ensure proper ventilation around the inverter to maintain optimal operating temperature and prevent overheating.
• For optimal battery life, configure the charging parameters according to your battery manufacturer's recommendations.

13. Warranty and Support

For technical assistance, warranty claims, or any questions regarding your ECGSOLAX ECG-LVM12K-SP Hybrid Solar Inverter, please contact ECGSOLAX customer support. When contacting support, please have your model number (ECG-LVM12K-SP) and purchase details readily available.

Refer to the official ECGSOLAX website or your purchase documentation for specific warranty terms and contact information.