Deye BOS-B
This datasheet provides complete technical specifications for the BOS-B models BOS-B-PDU-2 and BOS-B-Pack14.3. Key specifications include a nominal capacity of 280Ah, nominal energy of 14.3kWh, and an operating temperature range of -20 to 60°C. Designed for residential energy storage applications in the Germany region.
Technical Specifications
| Parameter | BOS-B-PDU-2 | BOS-B-Pack14.3 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Battery Module | |||||||||||
| Operating Voltage | 200-1000Vdc | ||||||||||
| Nominal Charge/Discharge Current | 168A | ||||||||||
| Operating Temperature | -20 to 60°C | ||||||||||
| Ingress Protection | IP20 | ||||||||||
| AC Input Rating | 220 ±10%Vac/2A | ||||||||||
| Details | 788.6×526×167.2(W×H×D),32kg | ||||||||||
| Battery System | |||||||||||
| Nominal Capacity | 280Ah | ||||||||||
| Nominal Energy | 14.3kWh | ||||||||||
| Nominal Voltage | 51.2Vdc | ||||||||||
| Max Charge/Discharge Current | 168A | ||||||||||
| Ingress Protection | IP20 | ||||||||||
| Operating Temperature (Charge) | 0-55°C | ||||||||||
| Operating Temperature (Discharge) | -20-55°C | ||||||||||
| Storage Temperature | 0-35°C | ||||||||||
| Details | 795.9×526×274.2(W×H×D),123kg | ||||||||||
| Operating Conditions | |||||||||||
| Operating Temperature (°C) | discharge: -20 – 55 | charge: 0 – 55 | |||||||||
| Storage Temperature (°C) | 0 – 35 | ||||||||||
| Humidity | 5% – 85% | ||||||||||
| Altitude | ≤3000m | ||||||||||
| Communication | |||||||||||
| Communication Port | TCP / RS485 / CAN | ||||||||||
| Communication with BMS | CAN | ||||||||||
| Mechanical Data | |||||||||||
| System Dimension (W × H × D, mm) | 1067 × 1136 × 800 | 1608 × 1136 × 800 | 2150 × 1136 × 800 | ||||||||
| System Weight Approximate (kg) | 680 | 803 | 926 | 1066 | 1189 | 1312 | 1435 | 1575 | 1698 | 1821 | 1944 |
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 (Germany)
Climate Suitability: Temperate climate with moderate temperatures. Good solar potential in southern regions. 1000-1200 kWh/kWp annual yield.
Regulatory: Coordinate with BNetzA, VDE for grid connection requirements.
- Ensure adequate ventilation for optimal performance.
- Consider additional protection for IP20 rated components in dusty environments.
- Coordinate with local utilities for grid integration.
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 maximum efficiency of the BOS-B?
The BOS-B does not specify a maximum efficiency percentage in its datasheet. However, it includes features like peak-valley management and overload protection that enhance performance.
What grid voltage does the BOS-B support?
The BOS-B supports an AC input rating of 220 ±10%Vac/2A, suitable for residential low-voltage applications.
What is the cycle life of the BOS-B?
The BOS-B datasheet does not specify the cycle life directly, but it uses LFP batteries known for long cycle life and reliability.
What is the warranty for the BOS-B?
The BOS-B comes with a 10-year manufacturer warranty, ensuring long-term reliability and support.
Is the BOS-B suitable for outdoor installation?
The BOS-B has an ingress protection rating of IP20, which is not suitable for outdoor installation as it is designed for indoor use.
What protection features does the BOS-B include?
The BOS-B includes overload protection, anti-backflow, and aerosol fire extinguishing support, ensuring safe operation.
Can the BOS-B be used in Germany?
The BOS-B is suitable for use in the Germany regions, given its operating temperature range of -20°C to 55°C and compliance with CE and IEC standards.
What monitoring options are available for the BOS-B?
The BOS-B offers communication via TCP, RS485, and CAN ports, allowing for effective monitoring and integration with BMS.