Three-phase Backup Box accessory for HUAWEI LUNA2000 Backup Box-B1 — three-phase backup switching for LUNA2000 system

The HUAWEI LUNA2000 Backup Box-B1 three-phase accessory provides three-phase backup switching for the LUNA2000 energy storage and inverter system. It is designed to enable safe connection of battery storage for backup power and to manage automatic or manual transfer to a backup supply during grid outages. Intended for residential and light commercial installations, this accessory integrates with the LUNA2000 platform to maintain continuity of power and ensure a controlled transition between grid and backup sources.

Advantages

The three-phase Backup Box-B1 supports coordinated switching across three phases, reducing phase imbalance and ensuring stable delivery of backup power to three-phase loads. It offers both automatic and manual transfer options to fit different operational preferences and maintenance needs. Installation with the LUNA2000 system simplifies wiring and control, while built-in safety measures protect connected batteries and loads during transfer events.

Suitable for

• Residential three-phase homes requiring backup power for essential circuits
• Small commercial premises with light three-phase loads
• Properties using HUAWEI LUNA2000 energy storage and inverter systems
• Sites where automatic or manual transfer between grid and battery backup is needed

Key specifications

• Three-phase backup switching capability for balanced transfer across phases
• Supports automatic and manual transfer modes
• Designed for integration with the LUNA2000 energy storage and inverter system
• Intended for residential and light commercial application environments
• Protective features to safeguard batteries and connected loads during switching

How to use

Install the Backup Box-B1 as part of the LUNA2000 system following HUAWEI installation guidelines and local electrical codes. Connect the accessory to the inverter, battery storage and the building three-phase distribution according to the system wiring diagram. Configure the transfer mode in the LUNA2000 control interface to select automatic switching for unattended backup or manual switching for controlled testing and maintenance. Test the switching operation after installation to verify correct sequencing and protection functions.

Recommendations

Use qualified personnel for installation and commissioning, and perform regular checks of connections, settings and protective devices. Match the Backup Box-B1 configuration to the specific LUNA2000 system and the electrical load profile to ensure effective three-phase backup operation.