Deye SE-G5.1 Pro-B
This datasheet provides complete technical specifications for the SE-G5.1 Pro-B. Key specifications include LiFePO₄ chemistry, 5.12 kWh usable energy, 6000+ cycle life, and scalability up to 327 kWh. Designed for residential solar self-consumption in the United Arab Emirates.
Technical Specifications
| Parameter | SE-G5.1 Pro-B | ||
|---|---|---|---|
| Battery Specifications | |||
| Battery Chemistry | LiFePO₄ | ||
| Built-in Circuit Breaker | 125A 2P, 60Vdc | ||
| Capacity (Ah) | 100 | ||
| Scalability | Max. 64 pcs pack (327kWh) in parallel (Max. 32 pcs no external setup) | ||
| Nominal Voltage (V) | 51.2 | ||
| Operating Voltage (V) | 43.2 - 57.6 | ||
| Energy (kWh) | 5.12 | ||
| Usable Energy (kWh) | 5.12 | ||
| Charge / Discharge Current (A) | 50 | 100 | 150 |
| Mechanical Data | |||
| Recommend Depth of Discharge | 90% | ||
| Dimension (W × H × D, mm) | 440 × 133 × 540 | ||
| Weight Approximate (kg) | 45 | ||
| Master LED Indicator | 5LED (SOC: 20% ~ SOC100%), 3LED (working, alarming, protecting) | ||
| IP Rating of Enclosure | IP20 | ||
| Operating Conditions | |||
| Operating Temperature | Charge: 0~55°C / Discharge: -20°C~55°C | ||
| Storage Temperature | 0°C ~ 35°C | ||
| Humidity | 5% ~ 95% | ||
| Altitude | ≤2000m | ||
| Battery System | |||
| Cycle Life | ≥6000 (25°C±2°C, 0.5C / 0.5C, 90%DOD, 70%EOL) | ||
| Installation | Wall-Mounted, Floor-Mounted, Rack-Mounted (19-inch standard cabinet, cabinet depth ≥600mm) | ||
| Communication Port | CAN2.0, RS485 | ||
| Energy Throughput | 16MWh@70%EOL | ||
Note: Specifications are based on the official Deye SUN-18/20/21K-G04-LV datasheet. Values may be subject to change; always verify against the latest manufacturer documentation before system design and procurement.
Key Features & Technical Highlights
Dual MPPT for LV Three-Phase Systems
The SUN-18/20/21K-G04-LV series incorporates two independent MPPT trackers optimized for low-voltage three-phase grid connections. Each MPPT supports 3 strings (3+3 configuration), enabling flexible array designs across different roof orientations or partial shading scenarios.
With a wide MPPT voltage range of 200V to 700V and rated DC bus voltage of 350V, the inverter accommodates various string configurations while maintaining peak efficiency on LV 127V/220V and 133V/230V networks.
Industry-Leading Efficiency
Maximum conversion efficiency of 98.6% combined with MPPT tracking efficiency exceeding 99% minimizes energy losses throughout the system lifetime. This high efficiency directly translates to improved energy yield and faster return on investment for commercial installations.
Comprehensive Protection Suite
- DC Side: Reverse polarity protection, surge protection (Type II), integrated DC switch
- AC Side: Overcurrent, overvoltage, and short circuit protection with Type II surge protection
- System Safety: Anti-islanding, residual current detection, insulation impedance monitoring
- Thermal Management: Intelligent air cooling with automatic derating above 45°C
- Optional: Arc Fault Circuit Interrupter (AFCI) for enhanced fire safety
Smart Monitoring & Grid Support
Standard RS485/RS232 communication ports with optional GPRS, WiFi, Bluetooth, 4G, and LAN connectivity enable comprehensive remote monitoring. Zero Export and VSG (Virtual Synchronous Generator) applications provide advanced grid interaction capabilities for self-consumption optimization and grid stability support.
Applications & Use Cases
Typical Applications
- Solar self-consumption
- Backup power
- Time-of-use optimization
- Off-grid systems
- Residential energy storage
Installation Notes (United Arab Emirates)
Climate Suitability: Hot desert climate with temperatures reaching 50°C in summer. High humidity in coastal areas (up to 100% RH). Frequent sandstorms and dust.
Regulatory: Coordinate with DEWA, ADDC, ESMA for grid connection requirements.
- Ensure adequate ventilation for optimal performance.
- Consider local regulations for battery installations.
- Plan for future scalability in residential setups.
Model Selection Guide
Selecting between the SUN-18K, SUN-20K, and SUN-21K-G04-LV depends on:
- Array Size: Match PV array DC capacity to inverter input power (DC/AC ratio typically 1.1–1.3×)
- Available LV Service Capacity: Verify main breaker and feeder ampacity can accommodate inverter output current
- Load Profile: Size to typical daytime load for maximum self-consumption in zero-export applications
- Expansion Plans: Consider future load growth when selecting inverter capacity
| Model | AC Output | Max PV Input | Typical Array Size* |
|---|---|---|---|
| SUN-18K-G04-LV | 18 kW | 23.4 kW | 19.8 – 23.4 kWp |
| SUN-20K-G04-LV | 20 kW | 26 kW | 22 – 26 kWp |
| SUN-21K-G04-LV | 21 kW | 27.3 kW | 23.1 – 27.3 kWp |
*Based on DC/AC ratio of 1.1–1.3× for optimal energy harvest in high-irradiance locations.
Frequently Asked Questions
What is the cycle life of the SE-G5.1 Pro-B?
The SE-G5.1 Pro-B has a cycle life of ≥6000 cycles at 25°C±2°C with a 0.5C charge/discharge rate and 90% depth of discharge. This ensures a long lifespan for residential use.
What battery chemistry does the SE-G5.1 Pro-B use?
The SE-G5.1 Pro-B uses LiFePO₄ (Lithium Iron Phosphate) chemistry, known for its safety and long lifespan. This chemistry is cobalt-free and environmentally friendly.
How many batteries can be connected in parallel with the SE-G5.1 Pro-B?
The SE-G5.1 Pro-B can connect up to 64 battery packs in parallel, allowing a maximum capacity of 327kWh. This scalability is ideal for expanding residential energy storage systems.
What is the warranty for the SE-G5.1 Pro-B?
The SE-G5.1 Pro-B comes with a 10-year manufacturer warranty. This warranty covers defects in materials and workmanship under normal use conditions.
Is the SE-G5.1 Pro-B suitable for outdoor installation?
The SE-G5.1 Pro-B is not suitable for outdoor installation as it has an IP20 rating. It is designed for indoor use where it is protected from dust and moisture.
What protection features does the SE-G5.1 Pro-B include?
The SE-G5.1 Pro-B includes a built-in circuit breaker rated at 125A 2P, 60Vdc. It also has a master LED indicator for working, alarming, and protecting states.
Can the SE-G5.1 Pro-B be used in United Arab Emirates?
Yes, the SE-G5.1 Pro-B can be used in the United Arab Emirates region. It complies with international certifications like CE and IEC62619, ensuring compatibility with local standards.
What monitoring options are available for the SE-G5.1 Pro-B?
The SE-G5.1 Pro-B supports monitoring via CAN2.0 and RS485 communication ports. This allows for remote monitoring and easy integration into energy management systems.