BYD Battery-Box Premium HVS+ 12.8kWh HV lithium battery

BYD Battery-Box Premium HVS+ 12.8kWh HV lithium battery

BYD, a global leader in battery manufacturing and energy storage solutions, presents the new generation of its high-voltage batteries: the BYD Battery-Box Premium HVS+ 12.8 kWh, part of the HVS+ series, a direct evolution of the renowned HVS.

These new units combine greater energy capacity, optimised performance, improved modular design and extended compatibility with the leading inverters on the market, reaffirming BYD's position as a benchmark in storage systems for residential and industrial self-consumption.

Thanks to its modular, stackable design (plug & play), the Battery‑Box Premium HVS+ 12.8 kWh allows for quick, safe and scalable installation, adapting to different consumption needs.

Why is the BYD Battery‑Box Premium HVS+ 12.8 kWh one of the best options on the market?

The BYD Battery-Box Premium HVS+ 12.8 kWh lithium battery consists of 1 unit. BCU+Base for HV Lithium Battery BYD Battery Box Premium HVS+ / HVM+ - 16541149-00 y 5 2.56 kWh HVS+ modules each, reaching a total usable capacity of 12.8 kWh.

This combination constitutes a high-voltage tower capable of delivering high continuous power and managing energy with precision, thanks to the integrated intelligent BMS (Battery Management System).

The BMS (Battery Management System) integrated in the BCU manages energy in real time, balancing cells, monitoring temperature and protecting the system against any incident. The whole system is designed to deliver performance, reliability and maximum safety for more than 6,000 charge cycles.

Main functions of the BYD Battery-Box Premium HVS+ 12.8 kWh

Modular and scalable design

The HVS+ series allows between 2 and 5 modules to be stacked on a single BCU+Base, making it easy to expand system capacity without replacing key components.
In the case of the 12.8 kWh model, the maximum number of modules (5 modules) has already been reached.

Intelligent management and control

The BMS system continuously monitors the voltage, current, and temperature of each module, ensuring efficient and stable operation. It also optimises the use of stored energy and charge/discharge distribution to extend the system's service life and improve overall efficiency.

Efficient and stable storage

Each HVS+ module uses lithium iron phosphate (LiFePO₄ or LFP) technology, known for its high thermal stability, intrinsic safety, long service life, and good performance in demanding environments.

Maximum protection and safety

The battery incorporates advanced protections against overcharging, over-discharging, short circuits and extreme temperatures.
Complies with international certifications IEC 62619, UN 38.3 and CE, guaranteeing electrical, mechanical and transport safety in any type of installation.
The reinforced and sealed metal casing helps prevent accidental damage and ensures secure external performance.

Advanced communication

The system integrates CAN and RS485 interfaces, which enable bidirectional communication with compatible inverters. This allows the battery to exchange information with the inverter, enabling backup modes, charge/discharge control, remote monitoring, etc.

Quick and safe installation

The modular plug-and-play design eliminates the need for internal wiring between modules. The modules are stacked vertically on the base (BCU+Base), and internal connectors ensure both mechanical and electrical connection. This reduces assembly time and minimises human error.

Robust and modular structure

The reinforced metal casing provides rigidity, protection against accidental contact, and mechanical stability. The modular, vertical design facilitates heat dissipation, enabling stable performance even in demanding environments.

Compatibility between BYD battery systems

The Battery‑Box Premium HVS+ 12.8 kWh is part of BYD's new generation of high-voltage batteries and is exclusively compatible with the HVS+ series and the new generation BCU+Base unit.

Battery-Box Premium HVS+: Stackable from 2 to 5 modules (5.1 - 12.8 usable kWh).

HVS+ modules are not backward compatible (HVS), so they cannot be combined with modules or BCUs from previous versions. They cannot be mixed in the same tower or put new towers in parallel with module towers of previous versions.

Compatibility with inverters

BYD Battery-Box Premium HVS+ lithium batteries are compatible with a wide range of market-leading inverters such as Fronius, GoodWe, SMA, Kostal, Victron, Huawei or Solis.
This compatibility ensures easy integration into self-consumption systems with storage, hybrid installations or backup configurations.

Updated list of inverters compatible with BYD Battery Box Premium HVS+ / HVM+ batteries Version V1.3, updated 17/10/25

HVS+ batteries

Advantages of the new design of the BYD Battery-Box Premium HVS+ 12.8 kWh

More power and flexibility

The HVS+ 12.8 kWh model offers superior power and energy density compared to previous series. It is ideal for residential photovoltaic systems that require night-time autonomy or stable energy backup.

Seamless integration with state-of-the-art inverters

Fully compatible with Fronius GEN24 Plus, GoodWe ET Plus+, SMA Sunny Boy Storage, Kostal Plenticore Plus and Victron Multiplus II, among others.

Minimal maintenance

No fans or moving parts. Passive cooling and IP55 sealing ensure long life without periodic maintenance.

Robust and safe design

Reinforced metal structure with full insulation against accidental contact.
Suitable for indoor installation (garages, technical rooms, attics, etc.).

How to size a battery?

The first step is to define the purpose for which you want the battery. Are you looking to save energy and store it during the day for use at night? Do you need a backup system for emergencies such as power outages or prolonged blackouts? Do you want to gain autonomy and greater independence from the utility companies?

Once you are clear about your target, all you have to do is calculate the consumption you would make during the hours of battery use. This calculation is very easy if you are expanding your panel installation because you will be able to access your actual data through your inverter's app, such as the Fronius Solar.web. If you do not have this data, you can always consult your supplier. As a general rule, around 40% of the daily consumption is made when there is no sun.

You should also take into account the power that the battery and inverter combination can deliver, which should be able to cover your peak consumption.

With this information, you can now choose the battery that best suits your needs.

Example of installation of a BYD Battery-Box Premium HVS+ 12.8 kWh

A typical installation includes:

1 × BCU+Base - 16541149-00
5 × HVS+ modules (2.56 kWh each)

This configuration provides 12.8 kWh of usable energy, sufficient to cover the night-time consumption of a large home, small businesses or mixed facilities with significant energy demand.

Recommended installation of a high-voltage lithium battery

• Location: dry indoors, on a stable surface, away from moisture or heat.
• Assembly: the BCU+Base is installed first; the modules are stacked on top vertically with plug & play connection, without internal cables. They are snapped together using the integrated connectors.
• Connection: power and communication cables are connected directly from the BCU via CAN / RS485 protocols to the inverter, without additional wiring between modules.
• Commissioning: This is done from the compatible inverter interface, which automatically detects the battery and configures the system according to the parameters of the BMS (Battery Management System).
• Compatibility: Exclusively with new generation BYD Premium HVS+ and BCU+Base systems.

What is the warranty on the BYD Battery Box Premium HVS+ lithium batteries?

BYD offers a 10-year warranty for the entire Battery-Box Premium HVS+ range, covering both the BCU unit and the battery modules, provided that the system is installed in accordance with the manufacturer's specifications and with approved inverters.

Technical specifications of the BYD Battery-Box Premium HVS+ 12.8 kWh HV lithium battery

Technical specifications BYD Battery-Box Premium HVS+ 12.8 kWh high-voltage lithium battery

Technical specifications of the BYD Battery-Box Premium HVS+ 12.8 kWh HV lithium battery

Installation manual for BYD Battery-Box Premium HVS+ 12.8 kWh lithium battery

Installation manual for the BYD Battery-Box Premium HVS+ 12.8 kWh lithium battery