Deye AI-W5.1-B 5.1 kWh - Pluggable & scalable battery storage with lithium iron phosphate technology

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Stock: 49

Product number: DEYAIW5.1-B

EAN: 8720929512645

Length: 720 mm

Width: 255 mm

Height: 300 mm

Weight: 53 kg

Product information

The DEYE AI-W5.1-B is a powerful, safe, and modularly expandable energy storage module with a capacity of 5.1 kWh. With its robust construction, easy installation, and high scalability, it is ideal for private and commercial photovoltaic systems. Thanks to cobalt-free LiFePO₄ technology and an intelligent battery management system, the module is particularly durable, efficient, and environmentally friendly.

Highlights at a glance

High safety: Cobalt-free lithium iron phosphate battery cells (LiFePO₄)
Scalable: Up to 6 modules per cluster, 36 modules in total (max. 184 kWh)
Flexible use: Wall or floor mounting possible, stackable design
Long service life: Over 6,000 charge cycles at 90 % DOD
Robust & weatherproof: IP65 protection class for outdoor operation
Convenient: Automatic networking, remote maintenance & firmware updates

Versatile energy storage for sustainable projects

Whether single-family home, apartment building, or commercial operation, the DEYE AI-W5.1-B meets a wide range of requirements for modern energy storage. Efficient use of renewable energies reduces electricity costs and increases self-consumption. The modular system can be easily expanded to keep pace with growing energy needs.

Safety & reliability at the highest level

Thanks to LiFePO₄ battery chemistry, the energy storage system is particularly safe, thermally stable and durable. The integrated battery management system (BMS) reliably protects against overcharging, overheating and short circuit. Passive cooling without fans allows silent and low-maintenance operation, even at temperatures from -20 °C to +55 °C.

Easy installation & maintenance

The flat, stackable design allows flexible placement on the wall or on the floor. No complex wiring is necessary. The modules automatically recognise each other in the system and can be conveniently monitored and updated via remote access.

Who is the DEYE AI-W5.1-B suitable for?

This storage unit is ideal for:

Private households who want to flexibly expand their solar system
Commercial operations that require modular and fail-safe storage solutions
Installers who rely on simple and time-saving systems
Sustainability-conscious users who value pollutant-free components

Model	DEYAI-W5.1-B
Battery type	LiFePO4
Module capacity (kWh)	5.12
Nominal module voltage (V)	51.2
Module capacity (Ah)	100
Nominal system voltage (V)	51.2
System operating voltage (V)	44.8-57.6
System capacity (kWh)	5.12
System usable capacity (kWh)	4.6
Charge/discharge current (A) - Recommendation	50
Charge/discharge current (A) - Nominal value	100
Charge/discharge current (A) - Peak discharge (2 min,25°C)	150
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 class of the housing	IP65
Storage temperature (°C)	0 ~ 35
Dimensions (W/D/H, mm)	720 * 255 * 300
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 energy storage module

How much energy can actually be used per module?

A single module provides 5.12 kWh gross capacity. Of this, at a depth of discharge of 90 % (DoD), around 4.6 kWh is usable, ideal for modular storage solutions with high efficiency.

Can I expand the system later?

Yes, up to six modules are possible per tower, which corresponds to 30.72 kWh per stack. By connecting up to six towers in parallel, the system can be scaled to a total capacity of about 184 kWh without additional hardware.

Which inverters does the module work with without an additional interface box?

The module is plug-&-play compatible with three-phase Deye hybrid inverters of the SUN-xK-HP3 and SUN-xK-BM series. Communication takes place directly via CAN or RS485 without a separate communication box.

Is active cooling necessary?

No, natural convection is sufficient to ensure reliable operation. According to the manual, only an air gap of at least 20 cm behind the module must be maintained so that heat can dissipate unhindered.

Does the module need to be fully charged before initial commissioning?

Yes, an initial charge to 100 % is recommended to correctly capture the State of Charge (SoC). If this step is omitted, deviating SoC values or inaccurate state of charge indications may occur during operation.

Scope of delivery Deye AI-W5.1-BATT (single 5.12 kWh battery module):

Module type

This is a pure expansion module (slave unit) for an existing Deye AI-W5.1-B system. It requires a separate BMS control unit for operation.

1 x Deye AI-W5.1-BATT battery module (5.12 kWh)

A pure battery module with 5.12 kWh, to be stacked onto a BMS unit or another battery module.

1 x connection bridge / parallel connection cable

Short, robust cables or a solid bridge to connect this module to an existing module.

1 x grounding cable (short)

A short protective conductor cable to connect to the grounding point of the neighbouring module.

1 x mounting accessories (tower mounting)

Includes screws or locks to securely stack the module onto an existing unit.

1 x installation guide for expansion module

A manual that specifically describes the expansion of an existing tower system.