1. Introduction
Thank you for choosing the SRNE SPI-6.5K-UP 6.5kW Split Phase Off-Grid Solar Inverter. This inverter is designed to provide reliable and efficient power conversion for your off-grid solar energy system. It features advanced MPPT technology, pure sine wave AC output, and is compatible with various battery types, making it an ideal solution for residential and small commercial applications in US 120/240V split-phase electrical systems.
This manual provides essential information for the safe installation, operation, and maintenance of your inverter. Please read it thoroughly before installation and keep it for future reference.
2. Safety Information
Please observe the following safety precautions during installation, operation, and maintenance:
- All electrical work must be performed by qualified personnel in accordance with local electrical codes and regulations.
- Do not attempt to disassemble or repair the inverter yourself. Refer all servicing to qualified service personnel.
- Ensure the inverter is installed in a well-ventilated area, away from flammable materials and direct sunlight.
- Wear appropriate personal protective equipment (PPE), including insulated gloves and safety glasses, when working with the inverter and associated wiring.
- Verify that all connections are secure and properly insulated to prevent electrical shock or fire hazards.
- Do not connect the inverter to a live AC source before completing all wiring and checks.
- Ensure proper grounding of the inverter.
3. Product Overview
The SRNE SPI-6.5K-UP inverter is a robust unit designed for seamless integration into off-grid solar systems. It converts DC power from solar panels and batteries into usable AC power for your home or facility.
3.1 Key Features:
- 6.5kW rated output power, 13,000VA peak power.
- Split-phase 120/240Vac output, suitable for US applications.
- Advanced MPPT (Maximum Power Point Tracking) technology for high solar energy harvesting efficiency (up to 99.90%).
- Pure Sine Wave output for compatibility with sensitive electronics.
- Supports various battery types: Li-ion, Lead-Acid, and user-defined.
- Parallel capacity for up to 6 units, allowing system expansion.
- Multiple communication interfaces: RS485, CAN, USB, Dry contact.
- Intelligent fan cooling system.
- Compact design with IP20 protection for indoor use.
3.2 Inverter Components:
Familiarize yourself with the physical components of your inverter:
Figure 1: Front View of the Inverter
Figure 2: Top-down Angled View with Ports
Figure 3: Rear View with Connection Ports (AC IN, AC OUT, Parallel Connection, BAT-, BAT+, PV1, PV2)
4. Specifications
Detailed technical specifications for the SRNE SPI-6.5K-UP inverter:
Figure 4: SRNE SPI Series Inverter Specifications
| Parameter | Value |
|---|---|
| Rated Output Power | 6.5kW |
| Peak Power | 13,000VA |
| Rated Output Voltage | 120/240Vac (Split Phase/Single Phase) |
| Input Voltage (DC) | 150~450Vdc |
| Output Frequency | 50/60Hz |
| Waveform | Pure Sine Wave |
| Switch Time | 10ms (typical) |
| Parallel Capacity | 1-6 units |
| Battery Type | Li-ion / Lead-Acid / User Defined |
| Battery Voltage | 48Vdc |
| Battery Voltage Range | 40-60Vdc |
| Max. PV Array Power | 10,000W |
| Max. PV Input Voltage | 500Vdc |
| MPPT Tracking Efficiency | 99.90% |
| Max. Inverter Efficiency | 93% |
| Dimensions (L*W*H) | 584.6 x 410 x 133 mm |
| Weight | 18.9 kg |
| Protection Rating | IP20 |
| Operating Temperature Range | -10°C to 55°C (>45°C derating) |
| Noise Level | <60dB |
| Cooling | Intelligent Fan |
| Embedded Interfaces | RS485, CAN, USB, Dry contact |
| External Modules (Optional) | Wi-Fi/GPRS |
| Certifications | IEC, CE |
5. Setup and Installation
Proper installation is crucial for the safe and efficient operation of your inverter. Please follow these guidelines:
5.1 Unpacking and Inspection:
- Carefully unpack the inverter and all accessories.
- Inspect the unit for any physical damage that may have occurred during transit. If damage is found, contact your supplier immediately.
- Verify that all items listed in the packing list are present.
Figure 5: Inverter in Packaging
5.2 Mounting the Inverter:
- Choose a suitable mounting location: indoors, vertically mounted, away from direct sunlight, rain, and dust.
- Ensure adequate clearance around the inverter for proper ventilation (at least 20 cm on all sides).
- The mounting surface must be strong enough to support the inverter's weight (18.9 kg).
- Use appropriate mounting hardware (screws, anchors) suitable for your wall type.
5.3 Wiring Connections:
All wiring must be done by a licensed electrician. Refer to Figure 3 for port locations.
- Grounding: Connect the inverter's ground terminal to a reliable earth ground.
- Battery Connection: Connect the battery bank to the BAT+ and BAT- terminals. Ensure correct polarity. Use appropriately sized cables and fuses. The inverter supports 48Vdc battery systems.
- PV Input Connection: Connect the solar panel array to the PV1 and PV2 terminals. Observe correct polarity and ensure the PV input voltage (150-450Vdc) and current are within the inverter's limits. The inverter has 2 MPPT trackers.
- AC Output Connection: Connect your home's main electrical panel (or critical load panel) to the AC OUT terminals. This inverter provides 120/240Vac split-phase output.
- AC Input Connection (Optional for Generator/Grid Bypass): If using a generator or grid as a backup, connect it to the AC IN terminals.
- Parallel Connection (Optional): If installing multiple inverters in parallel (up to 6 units), connect them using the 'PARALLEL CONNECTION' ports as per the detailed wiring diagram in the full manual.
- Communication Connections: Connect any optional communication modules (Wi-Fi/GPRS) or monitoring devices to the RS485, CAN, or USB ports.
Figure 6: Example of Inverter Installation in an Enclosure
5.4 Initial Power-up:
- Double-check all wiring connections for correctness and tightness.
- Ensure all DC and AC breakers are in the OFF position.
- Turn on the battery breaker first.
- Turn on the PV array breaker.
- Turn on the inverter's DC switch (if present).
- Turn on the AC output breaker.
- Observe the inverter's display for normal operation indicators.
6. Operating the Inverter
The inverter operates automatically once properly configured. The integrated display provides real-time system status and allows for parameter adjustments.
6.1 Energy Flow in an Off-Grid System:
The video below illustrates the typical energy flow throughout a day in an off-grid solar system:
Video 1: Off-Grid Solar System Energy Flow Demonstration. This video shows how solar panels generate power during the day, charging batteries and supplying household usage. In the evening and night, batteries supply power as solar generation ceases.
- Morning: Solar panels begin generating power, meeting household usage. Any excess power charges the battery storage.
- Midday: Solar production is at its peak, significantly outpacing usage. Batteries are charged to full capacity.
- Afternoon: Solar production remains high, topping off batteries.
- Evening/Night: Solar production ends. Batteries supply all power needs. As energy needs fall later at night, battery draw reduces.
6.2 Display and Controls:
The inverter features an LCD display and control buttons for monitoring and configuration. Refer to the full user manual for detailed navigation and parameter settings.
- Monitoring: View real-time data such as PV input voltage, battery voltage, AC output voltage/current, load power, and system status.
- Settings: Adjust various parameters including battery type, charge/discharge limits, AC output voltage/frequency, and operating modes.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your inverter.
- Cleaning: Keep the inverter's ventilation openings clear of dust and debris. Use a soft, dry cloth to clean the exterior. Do not use liquid cleaners.
- Connections: Periodically check all electrical connections (PV, battery, AC) for tightness and signs of corrosion. Tighten any loose connections.
- Environment: Ensure the installation environment remains within the specified temperature and humidity ranges.
- Battery Health: Monitor battery voltage and health regularly, especially for lead-acid batteries, to ensure optimal performance and lifespan.
- Firmware Updates: Check the manufacturer's website for any available firmware updates to improve performance or add new features.
8. Troubleshooting
This section covers common issues and basic troubleshooting steps. For complex problems, contact technical support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Inverter not turning on | No battery power; DC switch off; loose connections. | Check battery voltage; ensure DC switch is ON; inspect all wiring. |
| No AC output | Overload; short circuit; AC breaker tripped; low battery voltage. | Reduce load; check for short circuits; reset AC breaker; charge batteries. |
| Low PV charging power | Shaded panels; dirty panels; incorrect PV wiring; faulty panels. | Clear shading; clean panels; verify PV wiring and polarity; test panels. |
| Inverter displaying error code | Specific system fault. | Refer to the full user manual for error code definitions and solutions. |
9. User Tips
- Ventilation: Always ensure the inverter has ample space for airflow. Overheating can reduce efficiency and lifespan.
- Battery Management: For optimal battery life, avoid consistently deep discharging your batteries. Monitor their state of charge regularly.
- System Monitoring: Utilize the inverter's display or optional communication modules (Wi-Fi/GPRS) to keep track of your system's performance and identify potential issues early.
- Cable Sizing: Use appropriately sized cables for all connections (PV, battery, AC) to minimize energy loss and ensure safety. Consult electrical standards for correct sizing.
10. Warranty and Support
The SRNE SPI-6.5K-UP inverter comes with an 18-month warranty from the date of purchase, covering manufacturing defects. Please retain your proof of purchase for warranty claims.
For technical support, warranty inquiries, or any other assistance, please contact your supplier or SRNE directly:
- WhatsApp: +86 18932444372
- Email: 513077064@qq.com
When contacting support, please have your inverter model number (SPI-6.5K-UP) and serial number ready.
