1. Product Overview
The Sako SUNON V Hybrid Solar Inverter is a versatile power solution designed for both on-grid and off-grid solar applications. It integrates a 120A MPPT solar charger, WiFi monitoring, and advanced battery management, offering a reliable and efficient energy system.
Figure 1.1: Sako SUNON V Hybrid Solar Inverter highlighting 6.0KW 48V, 120A MPPT, Built-in BMS, 120~450Vdc Input, and ability to work without battery.
Key Features:
- High-Efficiency MPPT Charger: Integrated 120A MPPT solar charger with a maximum PV input of 6KW+ (27A).
- Flexible Operation: Supports both on-grid and off-grid modes, allowing for self-consumption and feeding excess energy back to the grid. Can operate without a battery during daylight hours.
- Advanced Connectivity: Built-in local WiFi for mobile monitoring (App required). Features USB On-The-Go (OTG) function for data storage.
- Scalable Design: Optional parallel operation for up to 9 units, enabling increased power output.
- User Interface: Intuitive LCD touch buttons and a user-programmable RGB lighting ring to indicate different operation modes.
- Battery Compatibility: Smart battery management system (BMS) compatible with various battery types including Lead-acid, AGM, Gel, Flooded, Tubular, and LiFePO4.
- Communication Ports: Equipped with RS232, USB, RS485, CAN-BUS, and dry contact for comprehensive system integration.
- Dual AC Output: Provides two AC output connections for flexible load management.
Figure 1.2: Inverter highlighting RGB lighting effects (Cycling, Wheel, Chasing) and key technologies like WiFi, BMS, and 120A MPPT.
Brand Clarification:
Please note that some units may feature the 'DENKI' logo. We would like to clarify that DENKI machines are original products from SAKO. The design and functionality are identical to SAKO’s original machines.
Figure 1.3: Example of SAKO inverter with DENKI branding.
2. Safety Information
WARNING: All wiring must be performed by qualified personnel.
Please read all instructions and warnings in this manual carefully before installation and operation. Failure to adhere to these instructions may result in electric shock, fire, or serious injury. Keep this manual for future reference.
- Ensure the inverter is installed in a well-ventilated area, away from flammable materials.
- Do not disassemble the inverter. There are no user-serviceable parts inside.
- Ensure all connections are secure and correctly polarized to prevent damage to the inverter and connected equipment.
- Install appropriate circuit breakers on both the AC and DC sides of the inverter for safety and maintenance.
- Avoid touching live terminals.
3. Product Components and Interface
3.1 Front Panel
Figure 3.1: Front view of the Sako SUNON V Inverter.
The front panel features an LCD display and touch buttons for monitoring and configuration. An RGB LED ring provides visual status indications.
3.2 Rear Panel Connections
Figure 3.2: Rear view of the Sako SUNON V Inverter with numbered ports.
- RGB LED ring (refer to LCD Setting section for details)
- LCD display
- Function buttons
- Current sharing port
- AC input connectors
- Circuit breaker
- AC output connectors (Load connection 1)
- AC output connectors (Load connection 2)
- DC output 12VDC 10A
- PV connectors
- Power switch
- Battery connectors
- Parallel communication port
- Dry contact
- USB port (for communication and function)
- BMS-communication port (CAN, RS-485 or RS-232)
- RS232 communication port
4. Setup and Installation
4.1 Mounting the Inverter
The inverter should be mounted vertically on a sturdy wall or surface. Ensure adequate clearance around the unit for proper ventilation. Refer to the product dimensions in the Specifications section for space requirements.
4.2 Wiring Connections
WARNING: All wiring must be performed by a qualified personnel. It's very important for system safety and efficient operation to use appropriate cable for battery connection. To reduce risk of injury, please use the proper recommended cable and terminal size.
4.2.1 Battery Connection
For safety and regulation compliance, it is requested to install a separate DC over-current protector or disconnection device between the battery and the inverter. It is recommended to connect a minimum of 100Ah capacity battery for 4.5KVA models and 200Ah capacity battery for 6.5KVA models.
Figure 4.1: Battery connection diagram for 4.5KVA (24VDC) and 6.5KVA (48VDC) models.
Prepare battery wires according to the model (e.g., four for 4.5KVA, two or four for 6.5KVA). Apply ring terminals to your battery wires and secure them to the battery terminal block with properly tightened bolts. Ensure correct polarity at both the battery and the inverter.
Recommended Battery Cable and Terminal Size:
| Model | Typical Amperage | Wire Size | Cable mm² | Ring Terminal Dimensions | Torque Value | |
|---|---|---|---|---|---|---|
| D (mm) | L (mm) | |||||
| 4.5KVA | 166.7A | 4*4AWG | 25 | 8.4 | 33.2 | 5 Nm |
| 6.5KVA | 129.6A | 2*2AWG or 4*4AWG | 38 or 25 | 8.4 | 39.2 or 33.2 | 5 Nm |
4.2.2 PV Module Connection
When selecting proper PV modules, ensure the Open Circuit Voltage (Voc) of PV modules does not exceed the maximum PV array open circuit voltage of the inverter (450VDC). Also, the Voc of PV modules should be higher than the minimum battery voltage.
Figure 4.2: PV module connection diagram.
PV Module Parameters for 6kVA Inverter:
| Parameter | Value | Notes |
|---|---|---|
| Inverter Model | 6 kVA | |
| Maximum output power | 6000W | |
| Maximum PV open circuit voltage | 450VDC | |
| Maximum charge current | 120A | |
| Maximum Power (Pmax) | 250W | Max. PV module numbers in series: 12 x 36V ≈120~450VDC |
| Max. Power Voltage Vmpp(V) | 36V | |
| Max. Power Current Impp(A) | 8.3A | PV module numbers in parallel: 12 x 8.3 < 120A |
| Open Circuit Voltage Voc(V) | 40V | Total PV module numbers: 2 x 12 = 24 |
| Short Circuit Current Isc(A) | 8.9A |
4.2.3 AC Input and Output Connections
You need to connect the cables of each inverter together. Take the battery cables for example: You need to use a connector or bus-bar as a joint to connect the battery cables together, and then connect to the battery terminal. The cable size used from joint to battery should be X times cable size in the tables above. "X" indicates the number of inverters connected in parallel.
WARNING: Make sure all output N wires of each inverter must be connected all the time. Otherwise, it will cause inverter fault in error code #72.
CAUTION: Please install the breaker at the battery and AC input side. This will ensure the inverter can be securely disconnected during maintenance and fully protected from over current of battery or AC input.
Recommended AC Input and Output Cable Size:
| Model | AWG no. | Torque |
|---|---|---|
| 6KVA | 10 AWG | 1.2~1.6Nm |
4.3 Parallel Operation
The Sako SUNON V inverter supports parallel operation for up to 9 units to increase total power output. Ensure proper wiring and communication setup when configuring multiple inverters in parallel.
Figure 4.3: Parallel connection diagram for up to 9 inverters.
5. Operating the Inverter
5.1 System Diagram and Power Flow
The inverter manages power flow from solar panels, utility grid, and battery banks to supply connected loads. It can prioritize power sources based on user settings.
Figure 5.1: General system diagram for the hybrid solar inverter.
5.2 Operation Modes (with and without battery)
The inverter can operate in various modes, including scenarios with and without battery connection, and different combinations of solar and AC power availability.
Figure 5.2: System operation scenarios with and without battery connected, and varying power sources.
5.3 LCD Display and WiFi Monitoring
The LCD display provides real-time system status, power flow, and error codes. The built-in WiFi module allows for remote monitoring and control via a dedicated smartphone application.
Video 5.1: Demonstration of LCD display interaction and WiFi monitoring via smartphone.
5.4 Uninterrupted Power Supply (UPS)
The hybrid inverter is designed to provide 24/7 uninterrupted power supply, seamlessly switching between power sources to ensure continuous operation of connected loads.
Figure 5.3: Inverter enabling 24/7 uninterrupted power supply.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your Sako SUNON V inverter.
- Cleaning: Periodically clean the exterior of the inverter and ensure ventilation openings are free from dust and debris. Use a dry, soft cloth.
- Connection Checks: Regularly inspect all wiring connections (DC, AC, battery, PV) for tightness and signs of corrosion.
- Environmental Conditions: Ensure the inverter is operating within its specified temperature and humidity ranges.
- Firmware Updates: Check for available firmware updates via the monitoring app or manufacturer's website to ensure optimal performance and access to new features.
WARNING: Disconnect all power sources (PV, AC, Battery) before performing any maintenance or cleaning.
7. Troubleshooting
This section provides guidance on common issues. For complex problems, contact qualified service personnel.
- Inverter Not Powering On: Check the main power switch (11 on Figure 3.2), AC input breaker, and battery connections. Ensure battery voltage is within the operating range.
- No AC Output: Verify AC output connections and ensure the load is not exceeding the inverter's capacity. Check for any error codes on the LCD display.
- No Solar Charging: Ensure PV panels are connected correctly and receiving sufficient sunlight. Check PV input voltage and current on the LCD. Verify PV input breaker.
- Error Code #72: This error code often indicates an issue with the output N wires not being connected correctly, especially in parallel configurations. Ensure all output N wires of each inverter are connected at all times.
- WiFi Connection Issues: Ensure the inverter's WiFi module is enabled and within range of your router. Refer to the app's instructions for connection setup.
If the issue persists or an unfamiliar error code appears, consult the manufacturer's support or a qualified technician.
8. Specifications
8.1 General Specifications (SUNON V 6.5KVA/6200W)
| Attribute | Value |
|---|---|
| Model Name | SUNON V 6.5KVA/6200W |
| Rated Power | 6.5KVA / 6200W |
| Output Power | 6000W |
| Output Type | SINGLE |
| Wave Form | Pure sine wave |
| Operating Temperature Range | -10°C to 50°C |
| Storage Temperature | -15°C to 60°C |
| Humidity | 5% to 95% Relative Humidity (Non-condensing) |
| Certification | CE, RoHS, ISO9001 |
| Is Smart Device | Yes |
| BMS | Built inside with BMS |
| Work Type | With or without battery |
| Function | USB On-the-go Function |
8.2 Electrical Specifications
| Attribute | Value |
|---|---|
| PV Input | |
| MPPT Voltage Range | 125-450Vdc (60-450Vdc) |
| Nominal Operating Voltage | 360Vdc |
| Maximum Input Current | 27A |
| Vmax PV | 500Vdc |
| Maximum PV Array Power | 6000W |
| AC Output | |
| Output Voltage | 230VAC ± 5% (90-280Vac) |
| Nominal Output Current | 27A |
| Output Frequency | 50HZ/60HZ (Auto sensing) |
| Maximum Power | 6200W |
| Surge Power | 12400VA |
| Power Factor | 1.0 |
| AC Input | |
| Max AC Input Voltage | 300Vac |
| AC Input Voltage Range | 90-280Vac |
| Nominal Input Current | 47.9A |
| Battery | |
| Battery Voltage | 48 VDC |
| Battery Voltage Range | 42-64Vdc |
| Floating Charge Voltage | 54 VDC |
| Overcharge Protection | 63 VDC |
| Maximum Battery Discharge Current | 147.6A |
| Maximum Charge Current | 120A |
| Efficiency | 90% - 93% |
| Transfer Time | 10 ms (For Personal Computers) ; 20 ms (For Home Appliances) |
8.3 Physical Dimensions
Figure 8.1: Product dimensions and weight.
- Size (D x W x H): 418 x 300 x 124 mm
- Net Weight: 13.5 kg
9. User Tips
- WiFi App: For WiFi monitoring, please refer to the product packaging or manufacturer's website for the specific application name and download instructions.
- Model Variations: While the product is generally referred to as 6kW, the detailed specifications indicate a 6.5KVA/6200W model. Always refer to the specific model number on your unit's label for precise specifications.
- Parallel Configuration: When setting up multiple inverters in parallel, ensure all communication cables are correctly connected and the system is configured according to the parallel operation guidelines to avoid errors.
10. Warranty and Support
For warranty information, please refer to the documentation provided with your purchase or contact your vendor. Technical support can be obtained through the seller or manufacturer's official channels.