1. Introduction
The ECGSOLAX Hybrid Energy Storage Inverter series integrates and manages photovoltaic systems, storage batteries, the power grid, and connected loads. It is designed to deliver 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 ECGSOLAX 7KW Hybrid Solar Inverter. Please read it thoroughly before installation and use.
Figure 1: ECGSOLAX 7KW Hybrid Solar Inverter highlighting key features like 7000W power, 48V battery voltage, 500VDC max PV input, MPPT 120A charging, and split phase 110V/240V output. It supports parallel connection of up to 6 units.
2. Key Features
- Battery Compatibility: Supports various energy storage batteries, including lead-acid and lithium-ion batteries.
- Output Versatility: Supports single-phase and split-phase pure sine wave output.
- Voltage Adjustment: Allows voltage adjustment for each phase within the range of 100~130V.
- Advanced MPPT: Features single-channel photovoltaic input with MPPT maximum power charging/carrying capacity. MPPT efficiency up to 99.9%, max current 27A per channel.
- Uninterrupted Power Supply (UPS): Two output modes (mains bypass and inverter output) ensure continuous power.
- Flexible Charging Modes: Offers four charging modes: PV only, Mains priority, PV priority, and Mains & PV hybrid charging.
- Timed Operations: Supports timed battery charging and discharging.
- Energy Saving: Single unit energy saving mode reduces no-load energy loss.
- Comprehensive Protection: Equipped with multiple protection functions for photovoltaic panels, batteries, loads, and the inverter itself.
- User-Friendly Interface: Capacitive intelligent touch screen with menu-based operation for intuitive parameter setting.
- Data Logging: Supports 256 event records and 1024 days of historical data storage.
- Smart Connectivity: Built-in Bluetooth and WIFI interfaces for native cloud platform access and automatic time synchronization.
3. Specifications
General
| Attribute | Value |
|---|---|
| Model Number | ECG-LVM7K-SP |
| Brand Name | ECGSOLAX |
| Rated Output Power | 7000 W (7KW) |
| Max. Peak Power | 14000 W |
| Output Type | DUAL (Single/Split Phase) |
| Rated Output Voltage | 100-130V/200V-260V (single/split phase) |
| Output AC Voltage Regulation (Batt.Model) | 120/240VAC |
| Rated Frequency | 50/60Hz |
| Output Waveform | Pure sine wave |
| On-load Motor Capability | 4.8HP |
| Switching Time | 10ms (typical value) |
| Is Smart Device | Yes (Built-in WIFI) |
| Origin | Mainland China |
| Certification | CE |
| Weight | 18.5 KG |
| Size (L*W*H) | 472 x 412 x 130 mm |
| 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 |
Battery
| Attribute | 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 |
PV Input
| Attribute | Value |
|---|---|
| MPPT Way Number | 1 |
| Max. Input Power | 10500W |
| Max. Input Current | 27A |
| Max. Open Circuit Voltage | 500Vdc |
| MPPT Operating Voltage Range | 125~425Vdc |
| MPPT Tracks Efficiency | 99.9% |
Mains/Generator Input
| Attribute | Value |
|---|---|
| Input Voltage Range | 90~140Vac |
| Input Frequency Range | 50/60Hz |
| Bypass Overload Current | 45A |
Communication
| Attribute | Value |
|---|---|
| Built-in Interface | RS485/ CAN /USB/ Dry contact |
| Communication Module | WIFI/Bluetooth |
4. Setup Guide
Proper installation is crucial for the safe and efficient operation of your hybrid solar inverter. Ensure all connections are secure and follow local electrical codes.
4.1 System Overview
Figure 2: Diagram illustrating the overall system connections, including solar panels, generator, utility grid, battery packs, the ECGSOLAX inverter, various loads (e.g., PC, fan, AC unit), and GPRS/WiFi monitoring.
The inverter acts as the central hub, managing power flow between solar panels, external power sources (utility grid, generator), battery storage, and connected loads.
4.2 Inverter Components and Ports
Figure 3: Front and side view of the inverter with numbered labels indicating various components and connection ports.
| No. | Component/Port | Description |
|---|---|---|
| 1 | Capacitive touch screen | User interface for monitoring and settings. |
| 2 | LED indicator | Indicates operational status and warnings. |
| 3 | Terminal protection cover | Covers electrical terminals for safety. |
| 4 | ON/OFF rocker switch | Main power switch for the inverter. |
| 5 | Parallel communication port | For connecting multiple inverters in parallel (up to 6 units). |
| 6 | RS485-1 port | Communication interface. |
| 7 | CAN/RS485-2 port | Communication interface, often used for battery BMS. |
| 8 | Dry contact | Programmable relay for external control. |
| 9 | Battery port (positive) | Positive terminal for battery connection. |
| 10 | Battery port (negative) | Negative terminal for battery connection. |
| 11 | Photovoltaic port | Input for solar panel array. |
| 12 | AC output (L+N) | Output for connecting loads. |
| 13 | AC input (L+N+E) | Input for utility grid or generator. |
4.3 Connection Steps (General)
- Mounting: Securely mount the inverter in a well-ventilated, indoor location, away from direct sunlight and moisture. Ensure the ambient temperature is within -10 ~ 55°C.
- Battery Connection: Connect the 48V battery bank to the Battery ports (9 and 10). Ensure correct polarity.
- PV Input Connection: Connect your solar panel array to the Photovoltaic port (11). Verify that the PV input voltage and current are within the inverter's specifications.
- AC Input Connection: Connect the utility grid or generator to the AC input port (13).
- AC Output Connection: Connect your household loads to the AC output port (12).
- Communication Connections: If using parallel units or external monitoring, connect the Parallel communication port (5), RS485-1 port (6), CAN/RS485-2 port (7), and Dry contact (8) as required.
- Power On: Once all connections are verified, switch the ON/OFF rocker switch (4) to the 'ON' position.
Warning: All electrical work should be performed by qualified personnel following all applicable electrical codes and safety regulations.
5. Operating Instructions
The inverter features a capacitive intelligent touch screen (1) for easy operation and monitoring.
5.1 Display and Navigation
The touch screen allows you to view real-time system status, energy flow, historical data, and adjust various parameters. Navigate through menus using the touch interface.
5.2 Charging Modes
Figure 4: Illustration of the four available charging modes and two load output working modes.
You can configure the inverter to operate in one of four charging modes:
- PV Only: Charges batteries exclusively from solar power.
- Mains Priority: Prioritizes charging from the utility grid/generator, using solar only when grid power is unavailable.
- PV Priority: Prioritizes charging from solar power, using the utility grid/generator only when solar power is insufficient.
- Mains & PV Hybrid Charging: Utilizes both mains and PV input for charging, optimizing efficiency.
5.3 Load Output Working Modes
The inverter supports two primary load output modes:
- Solar First: Prioritizes supplying power to loads from solar and battery, using the grid as a backup.
- Utility First: Prioritizes supplying power to loads from the utility grid, using solar and battery as a backup.
5.4 Timed Charging and Discharging
The inverter allows you to set specific times for battery charging and discharging, enabling you to take advantage of off-peak electricity rates or optimize self-consumption.
5.5 Energy Saving Mode
Activate the single unit energy saving mode to reduce no-load energy consumption, improving overall system efficiency.
5.6 Smart Connectivity (WIFI/Bluetooth)
Utilize the built-in WIFI and Bluetooth interfaces to connect your inverter to a cloud platform for remote monitoring and control. The inverter can automatically synchronize its time once connected.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your ECGSOLAX inverter.
6.1 General Cleaning
Keep the inverter's exterior clean and free from dust. Use a dry, soft cloth for cleaning. Do not use liquid cleaners or solvents.
6.2 Connection Checks
Periodically inspect all electrical connections (PV, battery, AC input/output) to ensure they are tight and free from corrosion. Loose connections can lead to overheating and system malfunction.
6.3 Ventilation
Ensure that the inverter's ventilation openings are not blocked. The inverter uses smart cooling to maintain optimal operating temperature, but proper airflow is essential. The inverter operates with low noise, typically around 45dB, which is comparable to a quiet library environment.
Figure 5: Noise level comparison, showing the inverter's operation at approximately 45dB, ensuring quiet performance.
6.4 Environmental Conditions
The inverter is rated IP20 for indoor use only. Protect it from water, excessive humidity, and extreme temperatures outside the specified operating range (-10 ~ 55°C).
7. Troubleshooting
The ECGSOLAX inverter is equipped with multiple protection functions to ensure safe and reliable operation. If an issue occurs, the LED indicator (2) and touch screen (1) will provide diagnostic information.
7.1 Built-in Protection Functions
Figure 6: Overview of the inverter's multi-protection features, including short-circuit, surge, overload, over-temperature, low voltage, and high voltage protection.
- Short-circuit Protection: Prevents damage from short circuits in the output.
- Surge Protection: Guards against sudden voltage spikes.
- Overload Protection: Shuts down if connected loads exceed the inverter's capacity.
- Over-Temperature Protection: Protects the inverter from overheating.
- Low Voltage Protection: Prevents battery over-discharge.
- High Voltage Protection: Protects against excessive input voltage.
7.2 General Troubleshooting Steps
- Check Display/LEDs: Observe any error codes or indicator lights on the capacitive touch screen or LED indicator. Refer to the full product manual (if available) for specific error code meanings.
- Verify Connections: Ensure all PV, battery, AC input, and AC output connections are secure and correctly wired.
- Check Power Sources: Confirm that solar panels are receiving sunlight, batteries are charged, and the utility grid/generator is supplying power if applicable.
- Reduce Load: If an overload error occurs, disconnect some loads to reduce the power demand.
- Restart Inverter: Turn off the inverter using the ON/OFF rocker switch, wait a few minutes, then turn it back on.
- Review Event Records: The inverter stores 256 event records and 1024 days of historical data, which can be accessed via the touch screen or connected cloud platform to diagnose intermittent issues.
8. User Tips
- Optimize Battery Settings: For lithium-ion batteries, ensure the correct battery type and voltage parameters are configured in the inverter settings to maximize battery life and performance.
- Monitor Remotely: Utilize the built-in WIFI/Bluetooth connectivity to monitor your system's performance and energy production from anywhere via the cloud platform. This helps in proactive troubleshooting and performance optimization.
- Parallel Operation: If you require more power, consider expanding your system by connecting up to 6 units in parallel. Ensure proper communication wiring and configuration for parallel operation.
- Regular Data Review: Periodically check the historical data logs for any recurring events or performance anomalies. This can help identify potential issues before they become critical.
9. Warranty and Support
The ECGSOLAX 7KW Hybrid Solar Inverter comes with a 3-year warranty from the date of purchase, covering manufacturing defects and malfunctions under normal operating conditions.
For technical support, warranty claims, or service inquiries, please contact your authorized ECGSOLAX dealer or the ECGSOLAX customer service department. Please have your model number (ECG-LVM7K-SP) and purchase details ready when contacting support.
