High Voltage Battery 40kWh System Successfully Installed in Vietnam

A 40 kWh high voltage battery system has been successfully deployed in Vietnam, engineered for stable power supply, high efficiency, and long-term reliability. The project integrates Deye's high-voltage inverter technology with a modular high-voltage battery architecture, forming a compact and scalable energy storage solution tailored for regions facing grid instability and rising electricity costs.

This installation demonstrates how high-voltage batteries combined with intelligent system design can deliver superior performance for residential and light commercial energy storage scenarios.

System Architecture Overview

    Battery module capacity: 5kWh per module

    Total modules: 8 stacked units

    Total system capacity: 40kWh Battery

    Configuration: High voltage battery modules + High voltage control box + Deye HV inverter

    Topology: Modular stacking design with centralized BMS communication

The modular design allows each 5kWh high voltage battery module to be stacked vertically and connected through a dedicated high voltage box, forming a unified high voltage DC bus to the inverter.

This architecture significantly reduces current, minimizes cable losses, and improves overall system efficiency compared to traditional low-voltage battery systems.

Why High Voltage Batteries Are Preferred in This Project

High voltage battery systems are increasingly adopted in Southeast Asia due to their technical and operational advantages:

For installers and EPC teams, this means faster deployment, safer commissioning, and simplified future maintenance.

Installation Highlights in Vietnam

Clean indoor installation with compact footprint

Optimized cable routing due to high voltage design

Seamless communication between the battery BMS and the Deye inverter

Stable charge/discharge performance under daily load cycles

Designed to support essential loads during grid outages

Vietnam's increasing demand for reliable backup power and solar self-consumption makes high voltage batteries an ideal solution for both homes and small businesses.

Operational Benefits Observed

After commissioning, the system delivers:

Reliable backup power during grid interruptions

Improved solar energy self-consumption rate

Reduced electricity bills through peak shaving

Stable long-cycle performance with balanced module management

Convenient future expansion if energy demand grows

The stacked configuration ensures each module operates under precise BMS control, enhancing system lifespan and safety.

A Reference Case for High Voltage Battery Applications in Southeast Asia

This Vietnam project serves as a practical reference for:

Residential solar + storage integration

Light commercial backup power systems

EPC companies deploying high voltage batteries with Deye inverters

Integrators seeking efficient ways to service high voltage system installations

As high voltage energy storage becomes mainstream, such modular 40kWh deployments represent the direction of next-generation battery system design—efficient, scalable, and installation-friendly.