Deye AI-W5.1-B Modular low-voltage battery system (10 kWh)
Description
Product information
The Deye AI-W5.1-B energy storage system with 10.24 kWh capacity offers a powerful, safe, and future-proof solution for the efficient use of renewable energy. Thanks to its modular, stackable design, the system is suitable for both residential and commercial applications. With robust LiFePO₄ technology, wireless plug-&-play installation, and intelligent control, the storage ensures maximum flexibility and long-term reliability.
Highlights at a glance
- 10.24 kWh nominal capacity, of which 9.2 kWh is usable (2 modules at 5.12 kWh, 90 % DoD)
- Wireless, plug-in stack mounting without screws or cabling
- Cobalt-free LiFePO₄ cells, ≥ 6000 charge cycles (EOL 70 %)
- IP65 protection, natural convection cooling, -20 °C to +55 °C operating temperature
- Auto-networking, remote monitoring, firmware upgrades
Compact. Flexible. Safe.
The Deye AI-W5.1-B is designed to grow with your energy needs. The system can be expanded in stacks up to 6 modules (30.72 kWh) and can be connected in up to 6 clusters in parallel, for a total capacity of up to 184 kWh. The smart plug-&-play connection makes installation quick, safe, and cost-efficient with no external cables or screws needed.
Intelligent energy management
Each module is equipped with a high-precision battery management system (BMS) that intelligently controls charge and discharge processes, protects cells, and maximises lifespan. Remote monitoring, automatic addressing, and wireless communication ensure simple system integration and high transparency during operation.
Robust technology for all conditions
Thanks to its IP65-certified housing, the storage is protected against dust and water jets and is suitable for interiors such as basements, technical rooms, and protected outdoor areas. Operation is possible at temperatures from -20 °C to +55 °C. The wireless design with natural convection cooling makes the storage silent, maintenance-free, and durable.
Who is the Deye AI-W5.1-B storage suitable for?
This battery system is ideal for:
- Households seeking to efficiently store surplus solar energy
- Businesses aiming to shave peak loads or operate off-grid
- Installers wishing to offer a modular, easily expandable storage system
- Hybrid or off-grid applications where reliable power supply is critical
- Sustainability-minded users that value pollutant-free, long-lasting technology
| Model | DEYAI-W10.2-B |
| Battery type | LiFePO4 |
| Module capacity (kWh) | 5.12 |
| Module nominal voltage (V) | 51.2 |
| Module capacity (Ah) | 100 |
| System nominal voltage (V) | 51.2 |
| System operating voltage (V) | 44.8-57.6 |
| System capacity (kWh) | 10.24 |
| System usable capacity (kWh) | 9.2 |
| Charge/discharge current (A) - recommendation | 100 |
| Charge/discharge current (A) - nominal value | 200 |
| Charge/discharge current (A) - peak discharge (2 min,25°C) | 270 |
| Operating temperature (°C) | Charge: 0 ~ 55 / Discharge: -20 ~ 60 |
| LCD display | SOC%, Power, Total Voltage |
| Communication connection | CAN2.0, RS485 |
| Humidity | 5% ~ 90% |
| Altitude | ≤2000m |
| IP protection rating of housing | IP65 |
| Storage temperature (°C) | 0 ~ 35 |
| Dimensions (W/D/H, mm) | 720 * 255 * 831 |
| Weight (kg) | 127.5 |
| Installation location | Floor mounting |
| Recommended depth of discharge | 90% |
| Cycle life | 25 ± 2°C, 0.5C/0.5C, EOL70% ≥ 6000 |
| Warranty | 10 years |
| Certifications | CE/IEC62619 /VDE2510-50/ UL1973/UL9540A/UN38.3 |
FAQs about the Deye AI-W5.1-B battery storage
Can I later expand the storage to 15 or 30 kWh?
Yes, up to six modules can be combined per stack for a total capacity of 30.7 kWh per stack. By parallel connecting up to six stacks, flexible scaling to significantly higher capacities is possible.
How many cycles does the battery last?
According to the data sheet, the storage achieves over 6,000 charge cycles at 90 % depth of discharge (DoD). This makes the system suitable for long-term use with consistently high performance and reliability.
Which inverters is the 10 kWh package compatible with?
The system is officially certified for three-phase Deye hybrid inverters of the SUN-xK-HP3 and SUN-xK-BM series. The communication and operating parameters are factory aligned. "Plug-&-Play" operation is possible without further configuration.
Can I operate the storage with other inverters?
There is no official approval for other inverters by Deye. Use with third-party devices is at your own risk and without any guarantee of function.
Does the battery need to be fully charged before its first use?
Yes, the manual recommends an initial 100 % charge to ensure correct synchronisation of the state of charge (SoC). If this step is skipped, the SoC values may deviate and the capacity display may be inaccurate.
Scope of supply Deye AI-W5.1-B Modular Low Voltage Battery System (10.24 kWh):
System composition
- This product is a set and consists of three separate main components forming a 10.24 kWh tower system.
Component 1: Deye AI-W5.1-B-BMS (control unit & base)
- The central control unit (BMS cluster) that manages the entire system. This unit forms the base of the battery tower.
Component 2 & 3: Two Deye AI-W5.1-BATT battery modules (5.12 kWh each)
- Two pure battery modules each with 5.12 kWh, to be stacked on the BMS unit.
1 x set of battery connection cables (plus & minus)
- A pair of heavy-duty cables to connect the BMS unit to an external hybrid inverter.
1 x communication cable (CAN/RS485)
- A data cable for communication between the BMS and the inverter.
1 x connecting bridge / parallel connection cable
- Short, robust cables or a fixed bridge to connect the two battery modules together.
1 x grounding cable
- A protective conductor cable for proper grounding of the BMS unit.
1 x mounting accessories (tower mounting)
- Includes screws or locking devices for securely connecting the three components into a tower.
1 x operating and installation manual
- A printed manual describing the installation of the entire tower system.
Properties
| Capacity: | 10.24kWh |
|---|---|
| Charging/discharging current: | 180A |
| Tension: | 51,2V |
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Scope of delivery: Deye SUN-10K-SG05LP3-EU-SM2 Three-phase Hybrid Inverter 10KW 1 x Deye SUN-10K-SG05LP3-EU-SM2 inverterA three-phase hybrid inverter with 10 kW output, integrated LCD touchscreen and support for 48V low-voltage batteries.1 x Wall Mount BracketA robust metal mounting rail for secure attachment of the device to a load-bearing wall.1 x Wi-Fi Stick (data logger)A plug-in communication module for connection to the internet for remote monitoring via Deye Cloud or Solarman App.3 x current transformers (CT - Current Transformer)External split-core current transformers for measuring energy flows at the domestic connection, necessary for zero feed-in and optimising self-consumption.1 x Set of PV connectors (MC4-compatible)The necessary pairs of DC connectors (plus and minus) for connecting the PV strings to the inverter.1 x Communication cable (BMS)A prefabricated RJ45 data cable for the connection between the inverter and battery management system.1 x Mounting kit (screws and dowels)A set of stainless steel screws and heavy-duty dowels for professional mounting of the wall bracket.1 x User manual (User Manual)A printed manual with detailed installation instructions, circuit diagrams, and safety information.