1. Introduction
Thank you for choosing the SKE PH21-3.6K Pure Sine Wave Hybrid Off-Grid Solar Inverter. This device integrates a solar charge controller, inverter, and battery charger functions to offer uninterruptible power support in a compact size. It is designed to provide reliable power for various applications, including home solar power systems.
This manual provides essential information for the safe and efficient operation of your inverter. Please read it thoroughly before installation and use, and keep it for future reference.
2. Safety Information
Please observe the following safety precautions to prevent injury and damage to the inverter:
- Ensure all wiring is performed by qualified personnel.
- Do not attempt to disassemble or repair the inverter yourself.
- Keep the inverter away from water, high humidity, and flammable materials.
- Ensure proper ventilation around the inverter to prevent overheating.
- Always disconnect all power sources (solar, utility, battery) before performing any maintenance or wiring.
- The inverter operates at high voltages; exercise extreme caution.
- This inverter is equipped with overload and short circuit protection.
3. Product Overview
The SKE PH21-3.6K is a versatile hybrid solar inverter designed for off-grid applications. It features a pure sine wave output, an MPPT solar charge controller, and can be configured to work with or without a battery. It also includes a built-in anti-dust kit for harsh environments and optional WiFi connectivity for monitoring.
3.1 Key Features
- Pure Sine Wave Inverter
- Integrated MPPT Solar Charge Controller
- Wide PV input voltage range (60-500VDC)
- Selectable AC/Solar input charging current
- Configurable with mains voltage or generator power
- Smart battery charger design for optimized battery performance
- Overload and short circuit protection
- Cold start function
- Built-in anti-dust kit for harsh environments
- Dual communication ports for battery and WiFi (optional WiFi module)
- WiFi monitoring available for iOS and Android (optional)
3.2 Appearance and Components
Familiarize yourself with the inverter's external components:
Image: Front, side, and bottom views of the SKE PH21-3.6K inverter with labeled components.
- LCD display
- Status indicator
- Charging indicator
- Fault indicator
- Function buttons (ENTER, DOWN, UP, ESC)
- Power on/off switch
- AC input
- AC output
- PV input
- Battery input
- Circuit breaker
- RS485 for BMS communication
- Antenna (for optional WiFi module)
4. Setup and Installation
Proper installation is crucial for the safe and efficient operation of your inverter. Please follow these guidelines:
4.1 Mounting the Inverter
- Choose a suitable location that is dry, well-ventilated, and protected from direct sunlight and moisture.
- Ensure sufficient clearance around the inverter for proper airflow, especially around the cooling vents.
- Mount the inverter securely to a vertical surface using appropriate hardware.
- The inverter has a built-in anti-dust kit, making it suitable for various environments.
4.2 System Connection Diagram
The following diagram illustrates a typical inverter system connection:
Image: Inverter System Connection showing Solar Panels, Inverter, AC Input (Generator), Battery, and AC Output to various loads.
- Solar Panels (PV Input): Connect your solar panel array to the PV input terminals (9) on the inverter. Ensure correct polarity (PV IN+ and PV IN-). The inverter supports a wide PV input voltage range of 60-500VDC.
- Battery Connection: Connect your 24V battery bank to the Battery input terminals (10) on the inverter. Observe correct polarity (BAT+ and BAT-). The smart battery charger design optimizes battery performance.
- AC Input: Connect the utility grid or a generator to the AC input terminals (7). The inverter is configurable with mains voltage or generator power.
- AC Output: Connect your household appliances and other loads to the AC output terminals (8). The inverter provides a pure sine wave output suitable for sensitive electronics.
- Communication: Utilize the dual communication ports (12) for battery management system (BMS) communication and optional WiFi connectivity.
Ensure all connections are tight and secure. Verify all wiring before powering on the system.
5. Operation
5.1 Powering On/Off
- To Power On: Ensure all connections are correct. Turn on the circuit breaker (11), then press the Power on/off switch (6). The LCD display (1) will light up, and the inverter will begin its startup sequence.
- To Power Off: First, disconnect all AC loads. Then, press the Power on/off switch (6) to turn off the inverter. Finally, turn off the circuit breaker (11) and disconnect the battery and solar inputs.
- Cold Start Function: The inverter supports a cold start function, allowing it to power on using only battery power without an AC input.
5.2 LCD Display and Function Buttons
The LCD display (1) provides real-time system status, including input/output voltage, battery status, and charging information. Use the function buttons (5) to navigate through menus and adjust settings:
- ENTER: Confirms selection or enters a menu.
- DOWN: Scrolls down through menu options or decreases a value.
- UP: Scrolls up through menu options or increases a value.
- ESC: Exits a menu or cancels an operation.
5.3 Charging Current Selection
The inverter allows for selectable AC/Solar input charging current. This setting can be adjusted via the LCD display to match your battery type and charging requirements, optimizing battery lifespan and performance.
5.4 WiFi Monitoring (Optional)
If equipped with the optional WiFi module, you can monitor your inverter's performance and status remotely via a dedicated app available for iOS and Android devices. Connect the antenna (13) and follow the instructions provided with the WiFi module for setup.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your SKE inverter:
- Cleaning: Periodically clean the exterior of the inverter with a dry cloth. Ensure ventilation openings are free from dust and debris. The built-in anti-dust kit helps reduce maintenance frequency in dusty environments.
- Connection Checks: Annually inspect all electrical connections (PV, battery, AC input/output) for tightness and corrosion. Loose connections can lead to overheating and poor performance.
- Battery Inspection: Regularly check your battery bank according to the battery manufacturer's recommendations. Ensure terminals are clean and free of corrosion.
- Environmental Check: Verify that the installation environment remains within the specified temperature and humidity ranges.
7. Troubleshooting
This section provides solutions to common issues you might encounter. For more complex problems, please contact customer support.
7.1 Common Issues and Solutions
| Problem | Possible Cause | Solution |
|---|---|---|
| Inverter not turning on | No battery power, loose connections, power switch off. | Check battery connections and charge level. Ensure power switch and circuit breaker are on. Utilize cold start function if needed. |
| No AC output | Overload, short circuit, battery low, inverter fault. | Reduce load. Check for short circuits in wiring. Recharge battery. Check fault indicator (4) on LCD. |
| Solar charging not working | PV input voltage too low/high, solar panels shaded, loose PV connections. | Check PV voltage. Clear shading. Verify PV input connections (9). |
| Inverter making unusual noise | Overload, fan malfunction, internal issue. | Reduce load. Ensure ventilation is clear. If noise persists, contact support. |
The inverter is equipped with built-in overload and short circuit protection to prevent damage. If a fault occurs, the fault indicator (4) will illuminate, and the inverter may shut down. Refer to the LCD display for specific error codes.
8. Specifications
Detailed technical specifications for the SKE PH21 series hybrid solar inverters:
Image: Overview of key performance metrics for SKE PH21 series inverters.
| Feature | PH21-1.2K | PH21-3.6K | PH21-6.2K |
|---|---|---|---|
| INPUT | |||
| Voltage | 230 VAC | ||
| Selectable Voltage Range | 170-280VAC (For Personal Computers); 90-280VAC (For Home Appliances) | ||
| Frequency Range | 50 Hz/60 Hz (Auto sensing) | ||
| OUTPUT | |||
| Rated Power | 1200VA/1200W | 3600VA/3600W | 6200VA/6200W |
| AC Voltage Regulation (Batt. Mode) | 230VAC±5% | ||
| Peak Power (Surge Power) | 2400VA | 7200VA | 12400VA |
| Efficiency (Peak) | 93% | ||
| Transfer Time | 10 ms (For Personal Computers); 20 ms (For Home Appliances) | ||
| Waveform | Pure sine wave | ||
| BATTERY | |||
| Battery Voltage | 12 VDC | 24 VDC | 48 VDC |
| Floating Charge Voltage | 13.5 VDC | 27 VDC | 54 VDC |
| Overcharge Protection | 14.6 VDC | 29.2 VDC | 58.4 VDC |
| SOLAR CHARGER & AC CHARGER | |||
| Solar Charger Type | MPPT | ||
| Maximum PV Array Open Circuit Voltage | 450 VDC | 500 VDC | 500 VDC |
| Maximum PV Array Power | 2000 W | 4000 W | 6000 W |
| MPP Range Operating Voltage | 60~400VDC | 60~450 VDC | 60~450 VDC |
| Maximum Solar Charge Current | 60 A | 80 A | 80 A |
| Maximum AC Charge Current | 60A | 80A | 80 A |
| Maximum Charge Current | 60 A | 80 A | 80 A |
| PHYSICAL & ENVIRONMENTAL | |||
| Dimensions (DxWxH mm) | 354x261x399 | 334x309x109 | 440x309x109 |
| Net Weight (kg) | 5.7 | 8.3 | 9.6 |
| Communication Interface | USB/RS232 | ||
| Humidity | 5% to 95% Relative Humidity (Non-condensing) | ||
| Operating Temperature | 0℃ to 50℃ | ||
| Storage Temperature | -15℃ to 60℃ | ||
| Certification | CE | ||
| Warranty | 2 Years | ||
9. User Tips
- Monitor Performance: Regularly check the LCD display for system status and performance metrics. If using the optional WiFi module, leverage the mobile app for convenient remote monitoring.
- Optimize Charging: Adjust the AC/Solar input charging current settings based on your battery type and usage patterns to maximize battery life.
- Load Management: Be mindful of the total load connected to the inverter to avoid exceeding its rated power and triggering overload protection.
10. Warranty and Support
The SKE PH21-3.6K Hybrid Solar Inverter comes with a 2-year warranty from the date of purchase, covering manufacturing defects and malfunctions under normal operating conditions.
For technical support, warranty claims, or any questions regarding your inverter, please contact SKE customer service:
Image: SKE Customer Service Contact Details.
Please have your product model and purchase information ready when contacting support.
11. Product Video Guide
Watch this video for a visual overview of the SKE Hybrid Solar Inverter's features and benefits:
Video: An overview demonstrating the key features and functionalities of the SKE Hybrid Solar Inverter.