Deye AI-W5.1-B-ESS
This datasheet provides complete technical specifications for the AI-W5.1-B-ESS. Models covered include AI-W5.1-3.6P-AU-B, AI-W5.1-5P-AU-B, AI-W5.1-6P-AU-B, AI-W5.1-8P-AU-B, AI-W5.1-10P-AU-B, and AI-W5.1-12P-AU-B. Key specifications include LiFePO4 chemistry, 5.12 kWh nominal energy, 100 Ah capacity, and IP65 protection. Designed for residential solar self-consumption in the United Arab Emirates.
Technical Specifications
| Parameter | AI-W5.1-3.6P-AU-B | AI-W5.1-5P-AU-B | AI-W5.1-6P-AU-B | AI-W5.1-8P-AU-B | AI-W5.1-10P-AU-B | AI-W5.1-12P-AU-B |
|---|---|---|---|---|---|---|
| Battery Module | ||||||
| Battery Chemistry | LiFePO4 | |||||
| Nominal Energy (kWh) | 5.12 | |||||
| Usable Energy (kWh) | 5.12 | |||||
| Capacity (Ah) | 100 | |||||
| Nominal Voltage (V) | 51.2 | |||||
| Operating Voltage (V) | 44.8-57.6 | |||||
| Rated DC Power (kW) | 2.5 | |||||
| Charge/Discharge Current (A) | Max. 100 | Peak (10s, 25°C) 150 | N/A | N/A | N/A | N/A |
| Mechanical Data | ||||||
| Battery Dimension (W/D/H, mm) | 720×255×300 | |||||
| Battery Weight (kg) | 53 | |||||
| IP Rating of Enclosure | IP65 | |||||
| Operating Conditions | ||||||
| Operating Temperature | Charge: 0~55°C | Discharge: -20~55°C | N/A | N/A | N/A | N/A |
| Storage Temperature | 0°C ~ 35°C | |||||
| Humidity | 5%~95%, non-condensing | |||||
| Altitude | <3000m | |||||
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 proper ventilation for optimal performance.
- Consider local utility regulations for battery installations.
- Plan for potential expansion with scalable models.
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 AI-W5.1-B-ESS?
The AI-W5.1-B-ESS has a cycle life of over 6000 cycles at 80% depth of discharge. This ensures long-term reliability for residential energy storage.
What battery chemistry does the AI-W5.1-B-ESS use?
The AI-W5.1-B-ESS uses LiFePO4 battery chemistry. This provides high safety and stability for residential applications.
How many batteries can be connected in parallel for the AI-W5.1-B-ESS?
Up to 16 AI-W5.1-B-ESS batteries can be connected in parallel. This allows for scalable energy storage solutions.
What is the warranty for the AI-W5.1-B-ESS?
The AI-W5.1-B-ESS comes with a 10-year manufacturer warranty. This covers defects in materials and workmanship.
Is the AI-W5.1-B-ESS suitable for outdoor installation?
Yes, the AI-W5.1-B-ESS is suitable for outdoor installation with an IP65 rating. This ensures protection against dust and water ingress.
What protection features does the AI-W5.1-B-ESS include?
The AI-W5.1-B-ESS includes an intelligent BMS and IP65 enclosure. These features ensure safety and reliability in various conditions.
Can the AI-W5.1-B-ESS be used in United Arab Emirates?
Yes, the AI-W5.1-B-ESS can be used in the United Arab Emirates. It is designed to operate in high temperatures up to 55°C.
What monitoring options are available for the AI-W5.1-B-ESS?
The AI-W5.1-B-ESS offers real-time monitoring via Deye Cloud. This allows users to track battery performance remotely.