1. Introduction
The DEMUDA DFHY Series Solar Inverter Integrated Machine is a high-frequency, pure sine wave inverter with a built-in MPPT (Maximum Power Point Tracking) charge controller. Designed for efficient energy management, this integrated solution facilitates seamless off-grid power self-sufficiency. It is suitable for various solar power applications, offering robust performance and advanced monitoring features.
Key Features:
- Integrated MPPT Controller (80A/100A)
- Wide Voltage Input (40-500V)
- Multiple Protection Mechanisms
- Smart Charging Mode
- Pure Sine Wave Output
- Battery-less Operation Capability
- WiFi Monitoring for remote access
- Lightweight and Compact Design
- Removable Dust Cover for easy maintenance
- Supports parallel operation of up to 9 units for increased power output (up to 55.8KW)
2. Safety Information
Please read and understand all safety instructions before installing, operating, or maintaining the inverter. Failure to follow these instructions may result in electric shock, fire, or severe injury.
- Installation must be performed by qualified personnel.
- Ensure the inverter is installed in a well-ventilated area, away from flammable materials.
- Do not expose the inverter to rain, snow, or liquids of any type.
- Verify all wiring connections are secure and correct before powering on the unit.
- Always disconnect all power sources (PV, battery, AC input) before performing any maintenance or servicing.
- The inverter features safety rounded corners to prevent accidental injury during handling and installation.
3. Package Contents
Upon unpacking, please ensure all items are present and undamaged. If any components are missing or damaged, contact your supplier immediately.
- DEMUDA DFHY Series Solar Inverter Integrated Machine
- User Manual
- Mounting accessories (screws, wall anchors)
- Communication cables (USB, Dry Contact, etc., as applicable to model)
- WiFi module (if included with your model)
4. Setup and Installation
4.1 Mounting the Inverter
The DEMUDA DFHY Series inverter is designed for wall mounting. Choose a location that is:
- Indoors, protected from direct sunlight, rain, and dust.
- Well-ventilated to ensure proper heat dissipation.
- Strong enough to support the weight of the inverter (refer to specifications for weight).
- Accessible for wiring and maintenance.
- Mark the drilling points on the wall using the inverter's mounting bracket as a template.
- Drill holes and insert wall anchors.
- Secure the mounting bracket to the wall.
- Carefully lift the inverter and hang it onto the mounting bracket.
4.2 Electrical Connections
Refer to the diagram below for connection points. Ensure all connections are made correctly and securely before proceeding.
- PV IN: Connect your solar panel array to these terminals. Observe correct polarity (PV+ and PV-).
- BAT+ / BAT-: Connect your battery bank to these terminals. Observe correct polarity.
- AC IN: Connect the AC utility grid input here.
- AC OUT: Connect your AC loads (appliances, home electrical system) here.
- WIFI: Port for connecting the optional WiFi module for remote monitoring.
- USB: USB communication port.
- Dry Contact: For external control or signaling.
- BMS: Battery Management System communication port.
4.3 Initial Power-Up
- Ensure all electrical connections are secure and correct.
- Turn on the battery breaker (if applicable).
- Turn on the PV array breaker (if applicable).
- Flip the ON/OFF switch on the inverter to the 'ON' position.
- The LCD display will light up, and the inverter will begin its startup sequence.
5. Operation
5.1 Control Panel
The inverter features an intuitive control panel with an LCD display and several buttons for configuration and monitoring.
- ON/OFF Button: Powers the inverter on or off.
- UP/DOWN Buttons: Navigate through menu options and adjust settings.
- FUNCT Button: Enters menu, confirms selections, or cycles through display screens.
- LCD Display: Shows real-time operational data, status, and error codes.
5.2 Monitoring and Settings
The inverter supports WiFi/GPRS for remote monitoring via a dedicated mobile application. This allows users to check product operating status, query faults, and receive alerts from anywhere.
Detailed instructions for connecting to the monitoring app and configuring settings can be found in the separate WiFi/GPRS module manual.
5.3 Parallel Operation
For increased power demands, multiple DFHY Series inverters can be operated in parallel. The system supports up to 9 units, achieving a combined output of up to 55.8KW.
Refer to the advanced installation guide for detailed instructions on setting up parallel systems.
6. Maintenance
Regular maintenance ensures optimal performance and longevity of your DEMUDA Solar Inverter.
6.1 Cleaning and Dust Removal
The inverter features a removable dust cover and built-in filter screen to prevent dust and insects from entering the unit, extending the lifespan of internal components.
- Periodically inspect the air vents for dust accumulation.
- Carefully remove the dust cover (if applicable) and clean the filter screen using a soft brush or compressed air.
- Wipe the exterior of the inverter with a dry, soft cloth. Do not use liquid cleaners.
6.2 Connection Checks
Annually, 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 performance issues.
7. Troubleshooting
This section provides solutions to common issues you might encounter. For problems not listed here, please contact technical support.
Common Issues:
- Inverter not powering on: Check AC input, battery connections, and the ON/OFF switch. Ensure sufficient battery voltage.
- No AC output: Verify AC output connections, check for overload conditions, and ensure the inverter is not in fault mode.
- Low PV charging: Check solar panel connections, ensure panels are clean and not shaded, and verify PV input voltage is within the MPPT range.
- Error codes on LCD: Refer to the specific error code definitions in the full technical manual for detailed diagnostics.
8. Specifications
The following table outlines the technical specifications for the DEMUDA DFHY Series Solar Inverter. Note that specifications may vary slightly between different power variants (e.g., 4.2KW and 6.2KW).
| Feature | DFHY-4.2KW (MDA-1K6S-DH) | DFHY-6.2KW (MDA-1K6S-DS1) |
|---|---|---|
| AC Input | ||
| Rated Power | 4.0 kW | 6.0 kW |
| Rated Voltage | 208/220/230/240 VAC; L+N+PE | 208/220/230/240 VAC; L+N+PE |
| Voltage Range | 170-280 VAC (UPS mode) | 170-280 VAC (UPS mode) |
| Frequency | 50/60 Hz (auto-sensing) | 50/60 Hz (auto-sensing) |
| AC Output | ||
| Rated Power | 5.7 kVA | 7.0 kVA |
| Power Factor | 1 | 1 |
| Efficiency | 92.7% @24VDC | 93% @48VDC |
| Transfer Time | 10 ms (UPS mode) | 10 ms (UPS mode) |
| Waveform | Pure Sine Wave | Pure Sine Wave |
| Overload Protection | 10s@110%-130%, 5s@130%-150%, 1s@>150% | 10s@110%-130%, 5s@130%-150%, 1s@>150% |
| Parallel Operation | NA | Up to 9 units |
| Solar Charger (MPPT) | ||
| Max PV Input Voltage | 500 VDC | 500 VDC |
| MPPT Range | 40-450 VDC | 120-450 VDC |
| Max PV Input Current | 100 A | 100 A |
| Max Charging Current | 80 A | 80 A |
| Battery | ||
| System Voltage | 24 VDC | 48 VDC |
| Float Charge Voltage | 27 VDC | 54 VDC |
| Overcharge Protection | 30.5 VDC | 61 VDC |
| Battery Type | Lead-acid and Lithium batteries | Lead-acid and Lithium batteries |
| General | ||
| Display | LCD | LCD |
| Interface | RS232/RS485/USB/Dry Contact | RS232/RS485/USB/Dry Contact |
| Communication | WiFi (Optional) | WiFi (Optional) |
| Protection Grade | IP20 | IP20 |
| Operating Temperature | -10°C to 50°C | -10°C to 50°C |
| Operating Humidity | 5%-95% (non-condensing) | 5%-95% (non-condensing) |
| Storage Temperature | -15°C to 60°C | -15°C to 60°C |
| Weight | 6.25 kg | 8.73 kg |
| Dimensions (W*H*D) | 290 x 440 x 100 mm | 305 x 470 x 110 mm |
9. User Tips
- Always ensure adequate ventilation around the inverter to prevent overheating, especially during peak operation.
- Regularly check the LCD display for any warning messages or error codes to address potential issues promptly.
- Utilize the WiFi monitoring feature for convenient remote oversight of your system's performance and health.
- For optimal battery life, ensure your battery type settings in the inverter match your installed batteries (Lead-acid or Lithium).
10. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your original point of purchase or the manufacturer's authorized service center. Keep your purchase receipt as proof of purchase.
