Deye AI-W5.1-B energy storage 25 kWh - Pluggable & scalable battery storage for maximum energy independence
Description
Product information
The Deye AI-W5.1-B in the 25 kWh version is a powerful, modular energy storage unit for PV systems in private and commercial use. With its high capacity, pluggable design, and outstanding performance in charging and discharging processes, it offers a future-proof solution for sustainable electricity storage.
Highlights at a glance
- Maximum storage capacity: 25.6 kWh for maximum requirements
- High charging/discharging current: 250 A for fast energy supply
- Low-voltage system: 51.2 V voltage for safety & compatibility
- Modular and scalable: Flexibly expandable for growing energy requirements
- Easy installation: Pluggable & installation-friendly for installers
- Robust housing: Long service life, even under intensive use
Efficient energy storage for large systems
With a usable capacity of 25.6 kWh, the Deye AI-W5.1-B is ideally suited for large households, apartment buildings, and commercial enterprises. It enables reliable storage of surplus solar energy and provides a continuous power supply even at high consumption or during grid disturbances.
Flexibility and scalability for a future-proof energy supply
The pluggable system allows particularly easy commissioning and modular expansion. The storage grows with your needs, making it especially suitable for operators who want to respond flexibly to increasing energy demands. Integration into existing systems is effortless and saves installation time.
Robust design for maximum operational safety
With its massive housing, an own weight of over 280 kg and a height of 1.69 m, the storage demonstrates long-term readiness for use. The integrated battery management system reliably protects against overcharging, deep discharge, and overheating.
Who is the Deye AI-W5.1-B 25 kWh battery storage suitable for?
This storage is ideal for:
- Large single-family and multi-family homes that want autonomy and security of supply
- Commercial PV systems that are to compensate for energy peaks or work off-grid
- Installers who rely on standardised, time-saving solutions
- Project planners who want to integrate scalable storage systems into their planning
| Model | DEYAI-W25.6-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) | 25.6 |
| System usable capacity (kWh) | 23 |
| Charging/discharging current (A) - Recommendation | 250 |
| Charging/discharging current (A) - Nominal value | 250 |
| Charging/discharging current (A) - Peak discharge (2 min,25°C) | 360 |
| Operating temperature (°C) | Charging: 0 ~ 55 / Discharging: -20 ~ 60 |
| LCD Display | SOC%, Power, Total Voltage |
| Communication port | CAN2.0, RS485 |
| Humidity | 5% ~ 90% |
| Altitude | ≤2000m |
| IP protection class of the housing | IP65 |
| Storage temperature (°C) | 0 ~ 35 |
| Dimensions (W/D/H, mm) | 720 * 255 * 1693 |
| Weight (kg) | 286.5 |
| Installation location | Floor mounting |
| Recommended depth of discharge | 90% |
| Cycle life | 25 ± 2°C, 0.5C/0.5C, EOL70% ≥ 6000 |
| Guarantee | 10 years |
| Certifications | CE/IEC62619 /VDE2510-50/ UL1973/UL9540A/UN38.3 |
FAQs about the 25 kWh DEYE AI-W5.1-B energy storage system
How much usable energy and electricity does the 20 kWh stack provide?
The stack provides 18.4 kWh of usable energy at 90% depth of discharge. The continuous current is 50A, which means that even larger hybrid systems can be safely and efficiently supplied.
Which inverter is the stack compatible with, and which setup code is required?
The storage is compatible with three-phase Deye hybrid inverters from the SUN-xK-HP3 and SUN-xK-BM series. For communication, the setup code 00 CA is used, which can be set either in the inverter menu or via DIP switches on the BMS.
Can firmware updates be performed remotely?
Yes, firmware updates for the BMS and logger are possible over-the-air (OTA) via the Deye-Cloud platform. This way, the system remains up to date during operation without on-site access.
Is active cooling necessary?
No, the storage works with natural convection, and no fans or external cooling systems are required. However, the manual recommends a minimum distance of 20 cm from the back wall to ensure air circulation.
Must the storage be fully charged before initial operation?
Yes, before first use, the storage should be charged once to 100%. This initial charge is required to accurately determine the state of charge (SoC) and to prevent incorrect SoC values or jumps during the charging process.
Scope of delivery Deye AI-W5.1-B Modular Battery System (25.6 kWh):
System composition
- This product is a set and consists of six separate main components, which together form a 25.6 kWh tower system.
Component 1: Deye AI-W5.1-B-BMS (control unit & base)
- The central control unit (BMS cluster), which manages the entire system. This unit forms the base of the battery tower.
Components 2, 3, 4, 5 & 6: Five Deye AI-W5.1-BATT battery modules (each 5.12 kWh)
- Five pure battery modules with 5.12 kWh each, which are stacked onto the BMS unit and one another.
1 x set of battery connection cables (plus & minus)
- A pair of high-performance cables for connecting 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.
4 x connection bridge / parallel connection cable
- Short, robust cables or fixed bridges to connect the five battery modules with each other.
1 x earthing cable
- A protective conductor cable for proper earthing of the BMS unit.
1 x mounting accessories (tower assembly)
- Includes screws or interlocks to securely connect the six components as a tower.
1 x operating and installation manual
- A printed manual describing the installation of the entire tower system.
Properties
| Capacity: | 25.6kWh |
|---|---|
| Charging/discharging current: | 250A |
| Tension: | 51,2V |
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