1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Srne SPI-8-12K-H3P series Three Phase Off-Grid Solar Inverter. Please read this manual thoroughly before installation and operation, and keep it for future reference.
The SPI series solar storage inverters are designed for off-grid solar power systems, providing reliable three-phase AC power from solar panels and battery storage. They feature advanced MPPT technology, pure sine wave output, and comprehensive safety mechanisms.
2. Safety Information
Please observe the following safety precautions to prevent injury and damage to the inverter:
- Installation must be performed by qualified personnel.
- Ensure all wiring is correctly polarized and securely connected.
- Do not expose the inverter to rain, snow, or liquids.
- Do not disassemble the inverter. There are no user-serviceable parts inside.
- Ensure adequate ventilation around the inverter to prevent overheating.
- Always disconnect all power sources (PV, battery, AC input) before performing any maintenance or wiring.
- This inverter is rated IP20 and is for indoor use only.
3. Product Overview
The Srne SPI-8-12K-H3P series inverter is a robust solution for off-grid solar energy systems. Key features include:
- Advanced MPPT technology with up to 99.9% efficiency.
- High-quality pure sine wave AC power output.
- Support for Li-ion and Lead-Acid batteries.
- Comprehensive security from hardware to software.
- User-friendly industrial design.
- Exclusive Li-ion battery BMS dual activation.
- Time-slot function for cost saving.
3.1 Inverter Components
Below are images illustrating the inverter from various angles, highlighting its design and connection points.
4. Specifications
The following table details the technical specifications for the SPI-8-12K-H3P series inverters:
| Feature | SPI-8K-H3P | SPI-10K-H3P | SPI-12K-H3P | Configurable |
|---|---|---|---|---|
| INVERTER OUTPUT | ||||
| Rated Output Power | 8,000W | 10,000W | 12,000W | |
| Max. Peak Power | 16,000W | 20,000W | 24,000W | |
| Rated Output Voltage | 400Vac, three-phase | √ | ||
| Capacity of Motor Load | 5HP | 6HP | 6HP | |
| Rated Frequency | 50/60Hz | √ | ||
| Output Waveform | Pure sine wave | |||
| Switching Time | 10ms (typical) | |||
| BATTERY | ||||
| Battery Types | Li-ion / Lead-Acid / User Defined | √ | ||
| Rated Battery Voltage | 48Vdc | |||
| Voltage Range | 40～60Vdc | √ | ||
| Max. PV Charging Current | 180A | 220A | 260A | √ |
| Max. Utility / Generator Charging Current | 100A | 120A | 120A | √ |
| Max. Hybrid Charging Current | 180A | 220A | 260A | √ |
| PV INPUT | ||||
| No. of MPPT | 2 | |||
| Max. Input Power | 6,000W/6,000W | 7,500W/7,500W | 9,000W/9,000W | |
| Max. Input Current | 22A/22A | |||
| Max. Open-circuit Voltage | 800Vdc/800Vdc | |||
| MPPT Operating Voltage Range | 200～650Vdc/200～650Vdc | |||
| UTILITY/GENERATOR INPUT | ||||
| Input Voltage Range | Phase voltage 170~280V, Line voltage 305~485V | |||
| Input Frequency Range | 50/60Hz | |||
| Bypass Overload Current | 63A | |||
| EFFICIENCY | ||||
| MPPT Tracking Efficiency | 99.9% | |||
| Max. Battery Inverter Efficiency | ≥92% | |||
| European Efficiency | 97.2% | 97.5% | 97.5% | |
| GENERAL | ||||
| Dimensions (L*W*H) | 620*445*130mm | |||
| Weight | 27kg | |||
| Protection Degree | IP20, indoor only | |||
| Ambient Temp | -10~55℃, >45℃ derated | |||
| Noise | <60dB | |||
| Cooling Method | Air cooling | |||
| Warranty | 18 months | |||
| COMMUNICATION | ||||
| Internal Interface | RS485 / CAN / USB / Dry contact | √ | ||
| External Module (optional) | Wi-Fi/GPRS | √ | ||
| CERTIFICATION | ||||
| Safety | IEC62109-1, IEC62109-2, UL1741 | |||
| EMC | EN61000-6-1, EN61000-6-3, FCC15 classB | |||
| RoHS | Yes | |||
5. Setup
5.1 Unpacking and Inspection
Upon receiving the inverter, carefully unpack it and inspect for any shipping damage. Ensure all components are present. If any damage or missing parts are found, contact your supplier immediately.
5.2 Mounting the Inverter
Choose a suitable indoor location for mounting the inverter, ensuring it meets the IP20 rating requirements. The location should be:
- Well-ventilated to allow for air cooling.
- Protected from direct sunlight, rain, and moisture.
- Away from flammable materials.
- Accessible for wiring and maintenance.
Use appropriate mounting hardware to securely fasten the inverter to a vertical surface. Refer to the physical dimensions (620*445*130mm) and weight (27kg) for proper installation planning.
5.3 Electrical Connections
All electrical connections must comply with local and national electrical codes. Refer to Figure 2 for port locations.
- **Battery Connection (BAT+ / BAT-)**: Connect the 48Vdc battery bank to the designated battery terminals. Ensure correct polarity.
- **PV Input (PV1 / PV2)**: Connect the solar panel arrays to the PV input terminals. Observe the maximum input power, current, and open-circuit voltage specifications to avoid damage.
- **AC Input (AC IN)**: Connect the utility grid or generator to the AC IN terminals. The inverter supports three-phase input (phase voltage 170~280V, line voltage 305~485V).
- **AC Output (AC OUT)**: Connect your three-phase loads to the AC OUT terminals.
- **Communication Ports (USB, RS485, CAN, Dry Contact)**: Connect any required communication devices or external modules (e.g., Wi-Fi/GPRS) as per your system design.
WARNING: Incorrect wiring can cause severe damage to the inverter, batteries, and connected loads, and poses a risk of electric shock. Always double-check all connections before powering on.
6. Operating Instructions
6.1 Initial Power-Up
- After all connections are securely made and verified, switch on the battery breaker.
- Switch on the PV array breaker.
- Switch on the AC input breaker (if connected to utility/generator).
- Finally, switch on the inverter's main power switch.
- The inverter display will light up, and it will begin its startup sequence. Monitor the display for any error codes or warnings.
6.2 Energy Flow in an Off-Grid System
The video below illustrates the typical energy flow throughout a day in an off-grid solar system with battery storage, similar to the setup supported by this inverter.
6.3 Display and Settings
The inverter features a display panel for monitoring system status and adjusting settings. Consult the full product manual (if available from the manufacturer) for detailed navigation and configuration options, including:
- Monitoring real-time power generation, consumption, and battery status.
- Setting battery charging parameters (for Li-ion, Lead-Acid, or user-defined types).
- Configuring output voltage and frequency.
- Utilizing the time-slot function for optimized energy usage.
7. Maintenance
Regular maintenance ensures optimal performance and longevity of your inverter. Always disconnect all power sources before performing maintenance.
7.1 Routine Checks
- **Visual Inspection (Monthly)**: Check for any visible damage, loose connections, or signs of overheating (discoloration, melted insulation).
- **Cleaning (Quarterly)**: Ensure the ventilation grilles are free from dust and debris to maintain proper air cooling. Use a soft, dry cloth to clean the exterior. Do not use liquid cleaners.
- **Connection Check (Annually)**: Verify that all electrical connections (PV, battery, AC input/output) are tight and free from corrosion.
7.2 Battery Maintenance
Follow the manufacturer's guidelines for your specific battery type (Li-ion or Lead-Acid) to ensure proper care and maximize lifespan.
8. Troubleshooting
This section provides solutions to common issues. For complex problems, contact technical support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Inverter not turning on | No battery power; Battery voltage too low; Loose connections. | Check battery connections and voltage. Ensure battery breaker is ON. |
| No AC output | Overload; Short circuit; Inverter fault; AC output breaker OFF. | Reduce load. Check for short circuits. Reset AC output breaker. Check inverter display for error codes. |
| PV not charging battery | No sunlight; PV array disconnected; PV voltage too low/high; MPPT fault. | Check PV connections and voltage. Ensure PV breaker is ON. Verify sunlight conditions. |
| Overheating warning | Blocked ventilation; High ambient temperature; Excessive load. | Clear ventilation grilles. Ensure proper airflow. Reduce load if ambient temperature is high. |
9. User Tips
- **Monitor Regularly**: Utilize the inverter's display or optional communication modules (Wi-Fi/GPRS) to regularly monitor system performance and battery state of charge.
- **Optimize Battery Settings**: If using user-defined battery types, carefully configure the charging and discharging parameters to match your battery's specifications for optimal lifespan and performance.
- **Load Management**: Be mindful of your total load, especially during periods of low solar production, to prevent excessive battery discharge or inverter overload.
10. Warranty and Support
The Srne SPI-8-12K-H3P series inverter comes with an 18-month warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use and service.
For technical support, warranty claims, or service inquiries, please contact your original point of purchase or the manufacturer's authorized service center. When contacting support, please have your inverter model number and purchase date available.
For quick assistance, you may contact the seller via WAP: +86 19118924805 or Email: maoyishunda@gmail.com.