1. Product Overview
The Sako E-Sun 3KVA Solar Inverter is an off-grid pure sine wave inverter designed for reliable power conversion in solar energy systems. It features a built-in 80A MPPT (Maximum Power Point Tracking) charge controller, a wide PV input range, and is compatible with 24V DC battery systems, including LiFePo4 batteries. This manual provides essential information for the safe and efficient operation and maintenance of your inverter.
2. Specifications
The following table details the technical specifications of the Sako E-Sun 3KVA Solar Inverter:
| Category | Parameter | Value |
|---|---|---|
| General | Model | SUNON E series (E-Sun 3KVA) |
| Rated Power | 3000VA / 2700W | |
| Input (AC) | Voltage | 230VAC |
| Selectable Voltage Range | 170-280VAC (UPS), 90-280VAC (Appliances) | |
| Frequency Range | 50Hz/60Hz (Auto sensing) | |
| Output (AC) | AC Voltage Regulation (Battery Mode) | 230VAC ± 5% |
| Surge Power | 6000VA | |
| Power Factor | 0.9 | |
| Efficiency (Peak) | > 90% | |
| Transfer Time | 10ms (UPS), 20ms (Appliances) | |
| Waveform | Pure Sine Wave | |
| 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 | |
| Overcharge Protection | 32VDC | |
| Solar Charger (MPPT) | PV Charging Method | MPPT |
| Maximum PV Array Power | 3200W | |
| MPPT Operating Voltage Range | 30-430VDC | |
| Maximum PV Array Open Circuit Voltage | 450VDC | |
| Max Output Current | 80A | |
| AC Charger | Maximum AC Charge Current | 60A |
| Maximum Efficiency | 0.98 | |
| Physical | Dimensions (D*W*H) | 350mm*270mm*98mm |
| Net Weight | 5KG | |
| Environmental | Humidity | 5% to 95% Relative Humidity (Non-condensing) |
| Operation Temperature | -10℃ to 50℃ | |
| Noise | ≤50db | |
| Other Features | Communication Interface | RS232/GPRS/Optional WIFI |
| Certifications | CE, RoHS |
3. Setup and Installation
Proper installation is crucial for the safe and efficient operation of your solar inverter. Please follow these guidelines:
3.1 Mounting the Inverter
- Choose a suitable location that is dry, well-ventilated, and away from direct sunlight or heat sources.
- Ensure the mounting surface can support the inverter's weight (approx. 5KG).
- Allow sufficient clearance around the inverter for proper airflow and cooling.
- Mount the inverter vertically using appropriate fasteners.
3.2 Wiring Connections
All wiring should be performed by qualified personnel in accordance with local electrical codes and regulations.
- PV Input: Connect your solar panels to the PV input terminals. Ensure the PV array open circuit voltage does not exceed 450VDC and the MPPT operating voltage range is between 30-430VDC.
- Battery Connection: Connect the 24VDC battery bank to the designated battery terminals. Ensure correct polarity (positive to positive, negative to negative). The inverter is compatible with LiFePo4 batteries.
- AC Input/Output: Connect the utility grid (if applicable) to the AC input and your home appliances/loads to the AC output.
- Grounding: Ensure the inverter is properly grounded.
Warning: Ensure the PV input voltage does not exceed the specified maximums to prevent damage to the inverter. Overloading will result in damage to the inverter and may void the product warranty.
4. Operating Instructions
4.1 Powering On/Off
- To power on, ensure all connections are secure, then switch on the AC breaker and the inverter's power switch.
- To power off, reverse the procedure: switch off the inverter's power switch, then the AC breaker.
4.2 LCD Display and Function Keys
The inverter features an LCD display and function keys for monitoring and configuration.
The LCD interface displays various parameters such as operation mode, load status, input/output voltage, and charging status. Use the ESC, UP, DOWN, and ENTER buttons to navigate menus and adjust settings.
4.3 Key Features
- Pure Sine Wave Output: Provides clean and stable power, suitable for sensitive electronics.
- Intelligent Power Distribution: Optimizes power usage, for example, when solar panels charge to 100%, 80% is used for load and 20% for charging.
- Uninterruptible Power Supply (UPS) Function: Features a powerful bypass function for seamless power transition.
- BMS Lithium Battery Communication: Compatible with various mainstream BMS protocols for intelligent charging and battery management.
- Wi-Fi Monitoring (Optional): With an optional Wi-Fi module, you can monitor the system operation via a smartphone app.
Video 1: Product overview and demonstration of the Sako E-Sun Solar Inverter.
5. Maintenance
Regular maintenance ensures the longevity and optimal performance of your Sako E-Sun Solar Inverter.
- Cleaning: Periodically clean the exterior of the inverter with a dry cloth. Ensure ventilation openings are free from dust and debris.
- Connections: Regularly check all electrical connections (PV, battery, AC input/output) for tightness and signs of corrosion.
- Environment: Ensure the operating environment remains within specified temperature and humidity ranges. Avoid exposing the inverter to moisture or extreme temperatures.
- Battery Health: Monitor battery voltage and health, especially if using lead-acid batteries, to ensure they are charging correctly and not over-discharging.
6. Troubleshooting
The inverter is equipped with multiple protection features and an LCD display to indicate operational status and potential faults. Refer to the display for error codes or indicators.
- No Power Output: Check AC input, battery connections, and inverter power switch. Verify battery voltage is above the low battery cut-off.
- PV Charging Issue: Ensure solar panels are receiving adequate sunlight and PV input voltage is within the MPPT operating range (30-430VDC). Check PV connections.
- Overload Warning: Reduce the connected load. The inverter has an overload capacity of 10.5s at 110%~150% load in battery mode.
- Fault Indicator: If the 'FAULT' indicator is lit, consult the detailed error codes in the full product manual (if available) or contact technical support.
7. User Tips
- For optimal performance, ensure your solar panel array is configured to provide voltage within the inverter's MPPT operating range.
- Consider installing the optional Wi-Fi module for convenient remote monitoring of your system's status.
- When connecting batteries, always double-check polarity to prevent damage.
- If using LiFePo4 batteries, ensure they have a compatible BMS for seamless integration with the inverter's charging capabilities.
8. Support
For technical assistance, warranty claims, or further information, please contact your seller or refer to the official Sako product documentation.
