1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the SUNGOLDPOWER SPH5048 5000W 48V Solar Inverter. This all-in-one unit integrates a 5000W pure sine wave inverter, a 100A MPPT solar charger, and a 40A AC battery charger, designed for off-grid 48V systems. Please read this manual thoroughly before installation and use to ensure proper function and safety.
Figure 1: Front view of the SUNGOLDPOWER SPH5048 Solar Inverter.
2. Product Features
- All-in-One Design: Combines a 5000W pure sine wave inverter, 100A MPPT solar charger, and 40A AC battery charger.
- High Power Output: 5000W continuous power, 120Vac AC output, suitable for various household and office loads.
- UL1741 Listed: Certified by ETL for safety and performance standards.
- Parallel Capability: Supports parallel operation of up to 6 units for increased power output (up to 30kW), including 120V single phase, 120V/240V split phase, and 208V 3-phase configurations.
- Flexible Charging Modes: Four selectable charging modes: AC Priority, Solar Priority, Only Solar, and Mains & Solar Hybrid Charging.
- Versatile Output Modes: Four selectable output modes: PV Priority, Utility Priority, Inverter Priority, and Hybrid Output.
- Battery Compatibility: Compatible with 48V AGM/Sealed, Gel, Flooded, and Lithium batteries, with a user-configurable mode for custom battery types. Battery charging voltage range: 40-60V.
- Communication Ports: Equipped with RS485 for BMS communication and USB for monitoring.
Figure 2: Key integrated features of the SPH5048 inverter.
3. Safety Information
Observe all safety precautions during installation and operation. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Installation must be performed by qualified personnel.
- Ensure all wiring complies with local and national electrical codes.
- Do not disassemble the inverter. There are no user-serviceable parts inside.
- Ensure proper grounding of the unit.
- Keep the inverter away from flammable materials and moisture.
- Verify correct battery polarity before connecting.
- Disconnect all power sources (solar, AC, battery) before performing any maintenance or wiring.
4. Package Contents
Upon unpacking, verify that all items listed below are present and undamaged:
- SUNGOLDPOWER SPH5048 5000 Watt 48V Solar Inverter (1 unit)
- User Manual
- Warranty Card
- DB15 Parallel communication line (for parallel models)
- Current sharing line (for parallel models)
- Communication Cable (USB)
Figure 3: SPH5048 product size and included accessories.
5. Product Overview
5.1. LCD Display and Indicators
The inverter features a dynamic LCD display and intelligent LEDs that provide real-time system information, including input/output data and potential error identification.
Figure 4: LCD display providing system status and error information.
5.2. Wiring Terminals and Ports
The rear panel of the inverter houses various ports for PV input, AC input/output, battery connection, and communication.
Figure 5: Rear view of the inverter with labeled ports.
- PV port
- AC output port
- AC input port
- Overload protector
- ON/OFF rocker switch
- RS485-2 communication port
- USB communication port
- RS485-1 communication port
- Dry contact port
- Current sharing port (parallel module only)
- Parallel communication port (parallel module only)
- Cooling fan
- Battery port
- Function key
- Indicator light
- LCD screen
6. Setup and Installation
6.1. Connection Diagram
The SPH5048 inverter can be integrated into various solar power systems. The diagram below illustrates a typical connection setup.
Figure 6: Typical system connection diagram.
6.2. Parallel Function
For increased power requirements, multiple SPH5048 units can be connected in parallel. The inverter supports single-phase, split-phase, and three-phase parallel operations.
Figure 7: Parallel operation configurations for single, split, and three-phase systems.
6.3. Battery Compatibility
The SPH5048 is designed to work with various 48V battery types. Ensure your battery settings are correctly configured in the inverter's menu.
Figure 8: Compatible battery types for the SPH5048 inverter.
7. Operating Modes
The inverter offers multiple charging and output modes to optimize energy management based on your specific needs.
7.1. Charging Modes
- Only Solar Charging: The battery is charged exclusively by solar power, regardless of AC utility availability.
- PV Priority: Solar energy is the primary charging source. AC utility charges the battery only when solar energy is insufficient.
- Utility Priority: AC utility is the primary charging source. Solar energy charges the battery only when AC utility is unavailable.
- Hybrid Charging: Both solar and AC utility can charge the battery simultaneously, with solar prioritized when available.
7.2. Load Output Working Modes
- PV Priority: Solar power supplies the loads as the primary source. The system switches to utility supply if solar power is insufficient.
- Utility Priority: AC utility powers the loads as the primary source. The system switches to inverter power supply (from battery/solar) only when utility supply is unavailable.
- Inverter Mode: The battery provides power to the loads preferentially. The utility will power the loads only when the battery is under voltage.
Figure 9: Overview of charging and load output modes.
8. Maintenance
Regular maintenance ensures optimal performance and longevity of your SPH5048 inverter.
- Cleaning: Periodically clean the exterior of the inverter with a dry cloth. Ensure ventilation openings are free from dust and debris.
- Connections: Annually check all electrical connections for tightness and corrosion. Loose connections can cause overheating and damage.
- Environment: Ensure the installation environment remains within specified temperature and humidity ranges.
- Battery Health: Monitor battery voltage and health according to battery manufacturer guidelines.
9. Troubleshooting
This section provides solutions to common issues. For problems not listed here, contact technical support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Inverter not turning on | No battery connection or low battery voltage; ON/OFF switch off. | Check battery connections and voltage; ensure switch is ON. |
| No AC output | Overload; short circuit; battery low; output mode incorrect. | Reduce load; check for short circuits; charge battery; verify output mode settings. |
| Solar charging not working | PV input voltage too low/high; solar panels disconnected; charging mode incorrect. | Check PV connections and voltage; verify solar charging mode. |
| Error code on LCD | Specific system fault. | Refer to the detailed error code list in the full manual or contact support. |
10. Specifications
| Feature | Specification |
|---|---|
| Model Name | SPH5048 |
| Wattage | 5000 watts |
| Input Voltage | 48V (Battery), 120Vac (AC), up to 500V (PV Array) |
| Output Voltage | 120Vac |
| MPPT Solar Charger Current | 100A |
| AC Battery Charger Current | 40A |
| Product Dimensions | 17.3 x 13.8 x 5.1 inches |
| Weight | 28 Pounds |
| Manufacturer | SGPWATT |
| Certifications | UL1741 listed by ETL |
11. Warranty and Support
SUNGOLDPOWER provides a 24-month warranty for the SPH5048 inverter. Lifetime technical support is available. For warranty claims or technical assistance, please contact SUNGOLDPOWER customer services in the USA.