1. Introduction
Thank you for choosing the Sako E-Sun 3KVA Solar Inverter. This manual provides essential information for the safe and efficient installation, operation, and maintenance of your inverter. Please read this manual thoroughly before installation and operation, and keep it for future reference.
The Sako E-Sun 3KVA is a pure sine wave off-grid solar inverter with a capacity of 3000VA/2700W. It features an 80A MPPT solar charger, a 24VDC battery system, and an integrated AC charger, making it ideal for home use in various power scenarios including solar, utility grid, and generator input.
2. Important Safety Instructions
WARNING: This section contains important safety instructions that must be followed during installation and operation of the inverter. Read and keep this manual for future reference.
- Installation must be performed by qualified personnel.
- Ensure all wiring is correctly polarized and securely connected.
- Do not expose the inverter to rain, snow, spray, or any liquids.
- Do not disassemble the inverter. There are no user-serviceable parts inside.
- Ensure the PV input voltage and VOC (Open Circuit Voltage) do not exceed the rated input voltage specified in the manual. Failure to adhere to the specified ratings will result in damage to the inverter.
- The power required by the connected AC load should not exceed the rated power of the inverter specified in the manual. Pay particular attention to the demands of inductive loads (fridges, compressors, motor-driven appliances) as these will draw 3-4 times their rated power at start-up. Overloading will result in damage to the inverter.
- If connecting the inverter in Parallel mode, the inverter must be set to Parallel mode before connecting the load. Failure to do so will result in damage to the inverter.
- The above conditions are not met, and the inverter is damaged, the product warranty will be voided.
- Always disconnect all power sources (solar, battery, AC input) before performing any maintenance or wiring.
3. Package Contents
Upon unpacking, please ensure all items listed below are included and undamaged:
- Sako E-Sun 3KVA Solar Inverter Unit
- User Manual
- Communication Cable (e.g., RS232)
- Other necessary cables/accessories (as supplied)
4. Product Overview
The Sako E-Sun 3KVA inverter is designed for robust performance and ease of use. It features a clear LCD display and intuitive controls for monitoring and configuration.
4.1. Front Panel
The front panel includes an LCD display and control buttons for navigating menus and settings. LED indicators provide quick status updates:
- AC/INV: Indicates AC input or inverter operation.
- CHG: Indicates battery charging status.
- FAULT: Indicates a system fault or error.
- Buttons: ESC, UP, DOWN, ENTER for menu navigation.
4.2. Side Panel
The side panel features a power switch and ventilation grilles for heat dissipation. A warning label provides critical operational parameters and safety information.
4.3. Rear Panel
The rear panel houses all the necessary connection terminals for solar panels, battery bank, AC input, and AC output to your home appliances.
5. Installation and Setup
Proper installation is crucial for the safety and performance of your inverter. It is highly recommended that installation be performed by a certified electrician or solar professional.
5.1. Mounting the Inverter
Mount the inverter vertically on a sturdy wall in a well-ventilated area, away from direct sunlight, heat sources, and flammable materials. Ensure sufficient clearance around the unit for proper airflow.
5.2. System Connection Diagram
The inverter can be integrated into various power systems, including solar, utility grid, and generator inputs, to power home appliances and charge a battery bank.
5.3. Wiring Connections
- Battery Connection: Connect the 24VDC battery bank to the designated battery terminals on the inverter. Ensure correct polarity (positive to positive, negative to negative).
- Solar Panel Connection: Connect your solar panels to the PV input terminals. Verify that the total PV array open circuit voltage (VOC) and power do not exceed the inverter's specifications (Max PV Array Open Circuit Vol: 450VDC, Max PV Array Power: 3200W).
- AC Input Connection: Connect the utility grid or generator AC input to the AC input terminals.
- AC Output Connection: Connect your home appliances to the AC output terminals. Ensure the total load does not exceed the inverter's rated power (2700W).
- Grounding: Ensure the inverter is properly grounded according to local electrical codes.
WARNING: Incorrect wiring can cause severe damage to the inverter, personal injury, or fire. Always double-check all connections before powering on the unit.
6. Operating Instructions
6.1. Powering On/Off
- Power On: After all connections are secure, switch on the battery breaker, then the solar array breaker (if applicable), and finally the AC input breaker. Turn on the inverter's power switch. The LCD display will light up, and the inverter will initiate its startup sequence.
- Power Off: First, turn off the inverter's power switch. Then, disconnect the AC input, followed by the solar array, and finally the battery bank.
6.2. LCD Display and Settings
The LCD display provides real-time system status and allows configuration of various parameters. Use the ESC, UP, DOWN, and ENTER buttons to navigate the menu.
- Configurable Input Voltage Range: Adjust the acceptable AC input voltage range for home appliances or personal computers.
- Configurable Battery Charging Current: Set the battery charging current based on your battery type and capacity.
- Configurable AC/Solar Charger Priority: Choose whether the inverter prioritizes charging from AC (utility/generator) or solar power.
- Auto Restart: The inverter will automatically restart when AC power is restored after an outage.
- Cold Start Function: Allows the inverter to start directly from the battery without AC input.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your Sako E-Sun inverter.
- Cleaning: Periodically clean the exterior of the inverter and ensure the ventilation grilles are free from dust and debris. Use a dry cloth; do not use liquids or solvents.
- Connection Check: Annually inspect all wiring connections (battery, solar, AC input/output) to ensure they are tight and free from corrosion.
- Battery Maintenance: Follow the manufacturer's guidelines for your specific battery type. Ensure battery terminals are clean and free of corrosion.
- Environmental Check: Ensure the installation environment remains within the specified operating temperature and humidity ranges.
8. Troubleshooting
This section covers common issues you might encounter and their potential solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Inverter does not power on | No battery connection or low battery voltage; Inverter switch off | Check battery connections and voltage; Turn on inverter switch |
| No AC output | Overload; Short circuit; Battery voltage too low; Inverter fault | Reduce load; Check for short circuits; Charge battery; Check fault codes on LCD |
| Battery not charging | No AC input or solar input; Charging current too low; Battery fault | Check AC/solar connections; Adjust charging current in settings; Inspect battery |
| Fault LED is on | Internal fault; Overload; Over-temperature | Refer to the LCD display for specific fault codes and consult the full manual or contact support. |
9. Specifications
Detailed technical specifications for the Sako E-Sun 3KVA Solar Inverter.
| Category | Parameter | Value |
|---|---|---|
| Model | Model Name | E-SUN 3KVA |
| Rated Power | Rated Power | 3000VA/2700W |
| AC Input | Voltage | 230VAC |
| Selectable Voltage Range (UPS) | 170-280VAC | |
| Selectable Voltage Range (Appliances) | 90-280VAC | |
| Frequency Range | 50Hz/60Hz (Auto sensing) | |
| AC Output | AC Voltage Regulation (Battery Model) | 230VAC ± 5% |
| Surge Power | 6000VA | |
| Power Factor | 0.9 | |
| Efficiency (Peak) | > 90% | |
| Wave Form | Pure Sine Wave | |
| No Load Current | 1.0A | |
| Battery | Battery Voltage | 24VDC |
| Low Battery Alarming Voltage | 22.0VDC | |
| Low Battery Cut Off Protection Voltage | 21VDC | |
| Low Battery Recovery Voltage | 23.0VDC | |
| Floating Charge Voltage | 27VDC | |
| Solar & AC Charger | Maximum PV Array Power | 3200W |
| MPPT Range Operating Voltage | 30-430VDC | |
| Maximum PV Array Open Circuit Voltage | 450VDC | |
| Max Output Current (MPPT) | 80A | |
| Maximum AC Charge Current | 60A | |
| Maximum Efficiency (Charger) | 0.98 | |
| Physical | Product Dimensions (D*W*H) | 350mm * 270mm * 98mm |
| Net Weight | 6kg | |
| Communication | Interface | RS232/GPRS/Optional WIFI |
| Operating Environment | Operating Temperature | -10°C to 50°C |
| Humidity | 5% to 95% Relative Humidity (Non-condensing) |
10. User Tips
- For optimal performance, ensure your solar panel array voltage falls within the MPPT operating range (30-430VDC).
- Consider using lithium batteries for better performance and longevity, as the inverter is compatible with them.
- Regularly check the inverter's display for any fault indicators to address issues promptly.
- If you plan to monitor your system remotely, consider the optional WIFI/GPRS module.
11. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your point of purchase or the manufacturer directly. Keep your purchase receipt and product serial number handy for faster service.