1. Introduction
The ECGSOLAX hybrid energy storage inverter series integrates and manages photovoltaic systems, storage batteries, the power grid, and connected loads. It delivers stable, safe, and clean electricity for residential, commercial, and industrial applications, meeting diverse energy needs. This manual provides essential information for the safe and efficient operation of your inverter.
2. Safety Information
Please read and understand all safety instructions before installation and operation. Failure to follow these instructions may result in electric shock, fire, or severe injury.
- Installation must be performed by qualified personnel in accordance with local electrical codes.
- Ensure the inverter is disconnected from all power sources (PV, battery, utility) before performing any maintenance or wiring.
- Do not operate the inverter if it is damaged or appears to be malfunctioning.
- Keep children and unauthorized persons away from the inverter.
- Ensure proper ventilation around the inverter to prevent overheating.
- This inverter is designed for indoor use only (IP20 protection level).
3. Product Overview
3.1 Key Features
- Supports various energy storage batteries (lead-acid, lithium-ion).
- Provides single-phase and split-phase pure sine wave output (110V/240V).
- Adjustable voltage for each phase within 100~130V.
- Single-channel MPPT photovoltaic input with up to 99.9% efficiency and 27A max current.
- Uninterrupted power supply function with mains bypass and inverter output modes.
- Four charging modes: PV only, Mains priority, PV priority, and Mains & PV hybrid charging.
- Supports timed battery charging and discharging.
- Energy saving mode to reduce no-load energy loss.
- Multiple protection functions: Short-circuit, Surge, Overload, Over-Temperature, Low Voltage, High Voltage.
- Capacitive intelligent touch screen for intuitive parameter setting.
- Stores 256 event records and 1024 days of historical data.
- Built-in Bluetooth and WIFI for native cloud platform access and automatic time synchronization.
3.2 Inverter Components
Refer to the diagrams below for an overview of the inverter's front panel and connection ports.
Figure 1: Front Panel Components
| No. | Component |
|---|---|
| 1 | Capacitive touch screen |
| 2 | LED indicator |
| 3 | Terminal protection cover |
| 4 | ON/OFF rocker switch |
| 5 | Parallel communication port |
| 6 | RS485-1 port |
| 7 | CAN/RS485-2 port |
| 8 | Dry contact |
| 9 | Battery port (positive) |
| 10 | Battery port (negative) |
| 11 | Photovoltaic port |
| 12 | AC output (L+N) |
| 13 | AC input (L+N+E) |
Figure 2: Rear Panel Connection Ports
4. Setup Instructions
4.1 Physical Installation
- Mount the inverter on a sturdy, non-flammable surface in a well-ventilated area.
- Ensure adequate clearance around the unit for heat dissipation.
- Avoid direct sunlight, moisture, and corrosive environments.
4.2 Wiring Diagram
The following diagram illustrates a typical connection setup for the hybrid solar inverter, integrating solar panels, a generator, the utility grid, a battery bank, and various household loads.
Figure 3: Typical System Wiring Diagram
4.3 Connection Steps
- Battery Connection: Connect the battery bank to the inverter's battery ports (positive to positive, negative to negative). Ensure correct polarity.
- PV Array Connection: Connect the solar panels to the photovoltaic port. Observe maximum input voltage and current limits.
- AC Input Connection: Connect the utility grid or generator AC input to the AC input (L+N+E) port.
- AC Output Connection: Connect your household loads to the AC output (L+N) port.
- Communication Connections: If using parallel operation or external monitoring, connect RS485, CAN, or parallel communication cables as required.
Always ensure all connections are secure and correctly polarized before proceeding to power up.
5. Operating Instructions
5.1 Initial Power-Up
- Ensure all wiring is complete and secure.
- Turn on the battery breaker.
- Turn on the PV array breaker.
- Turn on the AC input (utility/generator) breaker.
- Flip the ON/OFF rocker switch on the inverter to the 'ON' position.
- The inverter will perform a self-test and then begin operation according to its configured settings.
5.2 Operating Modes
The inverter offers flexible charging and output modes to suit various energy management needs.
Charging Modes:
- PV Only: Charges batteries exclusively from solar power.
- Mains Priority: Charges batteries primarily from the utility grid, supplementing with PV if available.
- PV Priority: Charges batteries primarily from PV, supplementing with utility if needed.
- Mains & PV Hybrid Charging: Utilizes both utility and PV to charge batteries simultaneously.
Load Output Working Modes:
- Solar First: Prioritizes solar power for loads, then battery, then utility.
- Utility First: Prioritizes utility power for loads, then solar, then battery.
Figure 4: Charging and Output Modes
5.3 Display and Settings
The capacitive intelligent touch screen allows for menu-based operation and convenient parameter setting. Consult the detailed product manual (if available) for specific menu navigation and parameter adjustments.
5.4 Data Logging and Connectivity
The inverter supports 256 event records and 1024 days of historical data storage. With built-in Bluetooth and WIFI interfaces, it provides native cloud platform access capabilities, allowing for remote monitoring and management. The device can automatically synchronize time after connecting to the internet.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your inverter.
- Cleaning: Periodically clean the inverter's exterior and ventilation openings to prevent dust buildup. Use a dry, soft cloth.
- Connection Checks: Annually inspect all electrical connections (PV, battery, AC input/output) for tightness and signs of corrosion.
- Firmware Updates: Check the manufacturer's website for any available firmware updates to ensure your inverter has the latest features and bug fixes.
- Battery Health: Monitor battery voltage and health according to battery manufacturer guidelines.
7. Troubleshooting
The inverter is equipped with multiple protection functions. If an issue occurs, the LED indicator or touch screen may display an error code or message. Refer to the table below for common issues and their solutions.
Figure 5: Multi-Protection Functions
| Problem | Possible Cause | Solution |
|---|---|---|
| Inverter not turning on | No battery connection, low battery voltage, ON/OFF switch off | Check battery connections, ensure battery voltage is within range, turn ON/OFF switch to 'ON'. |
| No AC output | Overload, short-circuit, inverter fault, AC output breaker tripped | Reduce load, check for short-circuits, reset AC output breaker, restart inverter. |
| No PV charging | No sunlight, PV array disconnected, PV voltage too low/high | Check PV connections, ensure adequate sunlight, verify PV voltage is within MPPT range. |
| Over-temperature warning | Insufficient ventilation, blocked fan, high ambient temperature | Ensure clear airflow, clean fan/vents, reduce load if ambient temperature is high. |
| System not connecting to Wi-Fi/Bluetooth | Incorrect network settings, out of range, network issue | Verify Wi-Fi password, ensure inverter is within range of router, check router status. |
For persistent issues or error codes not listed, please contact customer support.
8. Specifications
Detailed technical specifications for the ECGSOLAX 7KW Hybrid Solar Inverter (ECG-LVM7K-SP).
| Parameter | Value |
|---|---|
| Model Number | ECG-LVM7K-SP |
| Rated Output Power | 7000 W |
| Max. Peak Power | 14000 W |
| Rated Output Voltage | 100-130V/200V-260V (single/split phase) |
| On-load Motor Capability | 4.8HP |
| Rated Frequency | 50/60Hz |
| Output Waveform | Pure sine wave |
| Switching Time | 10ms (typical value) |
| Battery Type | Lithium-ion battery/lead-acid battery/User-defined |
| Rated Battery Voltage | 48Vdc |
| Voltage Range | 40~60Vdc |
| Max. PV Charging Current | 120A |
| Max. Mains/Generator Charging Current | 100A |
| Max. Hybrid Charging Current | 120A |
| Parameter | Value |
|---|---|
| MPPT Way Number | 1 |
| Max. Input Power | 10500 W |
| Max. Input Current | 27A |
| Max. Open Circuit Voltage | 500Vdc |
| MPPT Operating Voltage Range | 125~425Vdc |
| Mains/Generator Input Voltage Range | 90~140Vac |
| Input Frequency Range | 50/60Hz |
| Bypass Overload Current | 45A |
| Parameter | Value |
|---|---|
| Max. Efficiency of Battery Inverter | 93% |
| MPPT Tracks Efficiency | 99.9% |
| Size (L x W x H) | 472 x 412 x 130 mm |
| Net Weight | 16 kg |
| Level of Protection | IP20, for indoor use only |
| Ambient Temperature | -10 ~ 55°C, >45°C derated |
| Noise | ≤45dB |
| Cooling Method | Smart cooling |
| Warranty Time | 3 years |
| Built-in Communication Interface | RS485/ CAN /USB/ Dry contact |
| Communication Module | WIFI/Bluetooth |
| Certified Safety Rules | UL STD.1741, FCC SDOC Part 15B |
9. User Tips
- Split-Phase Output: This inverter is capable of providing split-phase output (110V and 240V simultaneously), making it suitable for typical North American household electrical systems. Ensure your wiring configuration matches this capability.
- Low-Noise Operation: The inverter features noise reduction technology, operating at ≤45dB, which is comparable to a quiet library environment (15dB) or a typical inverter (45dB), making it suitable for residential installations without significant noise disturbance.
- Versatile Applications: The inverter is designed for various usage scenarios, including full solar power systems, household solar panels, portable solar panel setups, and solar street lamps.
Figure 6: Low-Noise Operation
Figure 7: Usage Scenarios
10. Warranty and Support
The ECGSOLAX 7KW Hybrid Solar Inverter (ECG-LVM7K-SP) comes with a 3-year warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact ECGSOLAX customer support through their official channels. Please have your model number and purchase information ready when contacting support.
