BYD HVS 2.56kWh high-voltage battery module, modular

BYD’s HVS 2.56 kWh high-voltage battery module impresses with its high cycle stability and remarkable longevity thanks to its LiFePO4 technology. The battery’s modular and stackable design allows for versatile use in various scenarios and is characterized by very straightforward installation. It delivers outstanding performance, even under heavy loads. Along with the battery management system, the battery is the core component of the BYD HVS Battery Box Premium. This storage system can be easily expanded in series to include up to 5 modules without the need for cables. Connecting up to 3 identical battery boxes in parallel additionally enables a maximum capacity of 38.4 kWh.

The HVS 2.56 kWh Battery Module

• Powerful emergency/backup power
• Off-grid functionality
• Patented modular plug-in design
• Award-winning efficiency thanks to true series connection
• Compatible with leading single-phase and three-phase inverters
• Cobalt-free lithium iron phosphate (LFP) battery
• Highest safety standards according to VDE2510-50 / IEC62619 / CEC / CE / UN38.3
• 10-year warranty—you can find information on the warranty terms here

A compatibility list for BYD featuring over 30 inverter models—including, for example, Fronius, GoodWe, SMA, and Sungrow—is available for download in our attachments (Compatible Inverter List).

The New System Generation

The new BYD generation is based on the proven battery systems and offers all the same features as before. The Battery-Box Premium HVS introduces a battery module with a higher storage capacity than its predecessor. Thanks to advancements in cell technology, the system weight has been reduced by nearly 30% and the depth by 8 cm, which requires less floor space and results in a sleeker appearance. A highlight of the new storage systems is their IP55 protection rating, which allows for outdoor installation. In addition, the new generation offers even greater flexibility and scalability. Up to three battery towers can now be connected to form a single system. BYD remains true to its approach regarding charge and discharge rates, as each battery can deliver its rated capacity as power—that is, 1C. This makes the new series ideal for on-grid, on-grid plus backup, and off-grid systems.

Modular Battery System

The HVS Battery-Box can be configured with 2 to 5 HVS battery modules arranged in a series connection. This allows for a capacity ranging from 5.1 to 12.8 kWh. To achieve the maximum capacity of 38.4 kWh, up to 3 identical HVS towers can be connected in parallel. It is also possible to expand the system later by adding additional HVS modules or parallel HVS towers.

Powered at All Times: BYD Backup Power and Off-Grid Function

The B-Box HVS is extremely versatile and can be used in both on-grid and off-grid systems. Its integrated emergency power function is particularly practical and in high demand. This function enables the B-Box to supply power to the entire household during a power outage, either on a single phase or on three phases. This requires a compatible hybrid or storage inverter that supports both emergency power and off-grid functions. A list of compatible inverters can be found in the “Downloads” section.

Performance and Storage Capacity: Scalability Made Easy

BYD places great emphasis on the scalability of its storage systems. The new B-Box HVS is easy to retrofit and allows for simple expansion. A simple plug-in connection eliminates cable clutter and unnecessary complexity in the product design. It is possible to add additional storage modules. Furthermore, by connecting up to three storage towers in parallel, a maximum storage capacity of 38.4 kWh and a discharge power of 38.4 kW can be achieved. It is important to note that each storage tower must have the same number of modules.

Technical Parameters

• Capacity: 2.56 kWh
• Max. output current: 25A
• Peak output current: 50 A (3 sec)
• Rated voltage: 102.4 V
• Voltage range: 80–115.2 V
• Dimensions: 233 x 585 x 298 mm
• Weight: 38 kg
• Operating temperature range: -10°C to +50°C
• Protection class: IP55
• Battery efficiency: >96%
• Communication: CAN / RS485

Package contents:

1x BYD Battery-HVS 2.56 kWh battery module