HV BYD Battery-Box Premium HVS+ 7.7 kWh lithium battery

HV BYD Battery-Box Premium HVS+ 7.7 kWh lithium battery

BYD, a leading manufacturer of batteries and electric mobility solutions, is once again upgrading its high-voltage batteries. The new HV lithium batteries BYD Battery Box Premium HVS+ are the direct evolution of the successful HVS series.

These new batteries offer higher energy density, better performance, extended compatibility and easier integration with leading inverters on the market.

Thanks to its modular stackable design, this battery allows a fast, safe and scalable installation, adapting to different consumption needs, both in homes and in small businesses.

Why is the BYD Battery-Box Premium HVS+ 7.7 kWh one of the best options on the market?

The HV BYD Battery-Box Premium HVS+ 7.7 kWh lithium battery is composed of 1 unit BCU+Base for HV Lithium Battery BYD Battery Box Premium HVS+ / HVM+ - 16541149-00 y 3 2.56 kWh HVS+ modules each, reaching a total useful capacity of 7.68 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+ 7.7 kWh

Modular and scalable design

The BYD HVS+ system allows 2 to 5 modules to be stacked on a BCU+Base.
This facilitates future expansion of the system up to 12.8 useful kWh without replacing components, simply by adding new HVS+ modules.

Efficient and stable storage

Each HVS+ module uses lithium-ferrophosphate (LFP) technology, one of the safest on the market.
This chemistry offers high thermal stability, long life (more than 6,000 cycles) and consistent performance even in demanding environments.

Intelligent management and control

The BMS system continuously monitors the voltage, current and temperature of each cell, ensuring efficient and stable operation. It also optimises the use of stored energy to extend the life of the system.

Maximum safety, security and reliability

Complies with international standards IEC 62619, UN38.3 and CE, guaranteeing electrical, mechanical, thermal and transport safety.
The battery incorporates advanced protections against overcharging, over-discharging, short circuits and extreme temperatures.
Its sealed metal housing and fanless design allow for quiet, maintenance-free operation.

Advanced communication

It integrates CAN and RS485 interfaces, enabling seamless, bi-directional communication with leading inverters on the market.
This bi-directional communication enables intelligent management of the energy flow between the PV array, the battery and the household consumption.

Quick and safe installation

The plug & play system eliminates the need for internal wiring.
The modules are stacked vertically on the base, ensuring an automatic mechanical and electrical connection between them.
This reduces assembly times and minimises the risk of installation errors.

Compatibility between BYD battery systems

The Battery-Box Premium HVS+ 7.7 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+ 7.7 kWh

More power and flexibility

The HVS+ 7.7 kWh model offers higher power and energy density than the previous series. It is ideal for residential PV systems that demand nighttime 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.

Modular and expandable installation

It allows you to start with two modules (7.7 kWh) and expand up to 12.8 kWh by simply stacking new modules on the same base, without the need to change the initial unit.

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+ 7.7 kWh

A typical installation includes:

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

This configuration with its 7.7 useful kWh can cover the nightly consumption of an average single-family home or small office with a daily electricity consumption of 6 to 8 kWh.

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; modules are stacked on top of it vertically with plug & play connection, without internal cables. They are snapped into place 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?

The BYD Battery-Box Premium HVS+ 7.7 kWh comes with a 10-year official BYD warranty, which covers both the BCU and the modules, provided the system is installed according to the manufacturer's specifications and with approved inverters.

Technical specifications of the HV BYD Battery-Box Premium HVS+ HVS+ 7.7 kWh Lithium battery

Datasheet HV Lithium battery BYD Battery-Box Premium HVS+ 7.7 kWh

BYD Battery-Box Premium HVS+ HVS+ 7.7 kWh Lithium Battery Technical Datasheet

Installation manual HV Lithium Battery BYD Battery-Box Premium HVS+ 7.7 kWh

BYD Battery-Box Premium HVS+ HVS+ 7.7 kWh Lithium Lithium Battery installation manual