Deye AI-W5.1-B Energy Storage 25 kWh - Plug-in & Scalable Battery Storage for

The Deye AI-W5.1-B in the 25 kWh version is a high-performance, modular energy storage system for PV installations in both residential and commercial settings. With its high capacity, modular plug-in design and outstanding performance during charging and discharging, it offers a future-proof solution for sustainable electricity storage.

Highlights at a glance

• Maximum storage capacity: 25.6 kWh for the most demanding requirements
   
• High-performance charging/discharging current: 250 A for rapid power supply
   
• Low-voltage system: 51.2 V voltage for safety & compatibility
   
• Modular and scalable: Flexibly expandable to meet growing energy requirements
   
• Easy installation: Plug-in & installer-friendly
   
• Robust housing: Long service life, even with intensive use

Efficient energy storage for large systems

With a usable capacity of 25.6 kWh, the Deye AI-W5.1-B is ideal for large households, multi-family houses and commercial operations. It enables the reliable storage of surplus solar energy and ensures a continuous power supply even during high consumption or grid disturbances.

Flexibility and scalability for a future-proof energy supply

The plug-in system allows particularly simple commissioning and modular expansion. The storage system grows with your requirements, making it especially suitable for operators who want to respond flexibly to rising energy demands. Integration into existing systems is effortless and saves installation time.

Robust construction for maximum operational reliability

With its solid housing, a net weight of over 280 kg and a height of 1.69 m, the storage system stands for long-term operational readiness. 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 system suitable for?

This storage system is ideal for:

• Large single-family and multi-family homes seeking self-sufficiency and security of supply
   
• Commercial PV installations intended to balance energy peaks or operate independently from the grid
   
• Installers who rely on standardised, time-saving solutions
   
• Project planners wishing to integrate scalable storage systems into their planning

FAQs on the 25 kWh Deye AI-W5.1-B energy storage system

How much usable energy and power does the 25 kWh stack provide?

The stack provides 23 kWh of usable energy at 90 % depth of discharge. The continuous current is 50 A, allowing even larger hybrid systems to be supplied safely and efficiently.

Which inverter is the stack compatible with and which setup code is required?

The storage system is compatible with Deye hybrid inverters from the low-voltage series. Setup code 00 CA is used for communication and is set either in the inverter menu or via DIP switches on the BMS. Prior checking against the compatibility list is recommended. Deye storage systems are only compatible with Deye inverters.

Can firmware updates be carried out remotely?

Yes, firmware updates for the BMS and the logger are possible over-the-air (OTA) via the Deye cloud platform. This keeps the system up to date even during operation without on-site access.

Is active cooling necessary?

No, the storage system operates with natural convection; no fans or external cooling systems are required. However, the manual recommends a minimum distance of 20 cm from the rear wall to ensure air circulation.

Must the storage system be fully charged before initial commissioning?

Yes, before first use the storage system should be charged once to 100 %. This initial charge is necessary to correctly detect the State of Charge (SoC) and to avoid deviating SoC values or jumps in the charging curve. If solar energy is insufficient, the storage system can also be charged from the grid.



 

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) that 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 (5.12 kWh each)

• Five pure battery modules of 5.12 kWh each, stacked on the BMS unit and on top of one another.

1 x set of battery connection cables (positive & negative)

• 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 connecting bridges / parallel connection cables

• Short, robust cables or fixed bridges to connect the five battery modules to each other.

1 x earthing cable

• A protective conductor cable for compliant earthing of the BMS unit.

1 x mounting accessories (tower mounting)

• Includes screws or locking elements to securely connect the six components into a tower.

1 x operating and installation manual

• A printed manual describing the installation of the entire tower system.