# Huawei | LUNA2000 Backup Box | Three-phasis | Backup Box-B1

- **Brand:** Huawei
- **SKU:** 562-689725645fbf5
- **Price:** 589.00 EUR
- **Availability:** In stock
- **Categories:** Battery Energy Storage

The Huawei Backup Box-B1 is a reliable backup power module designed for integration with Huawei's three-phase SUN2000-M1 series inverters and LUNA2000 battery systems. In the event of a grid failure, it automatically switches the inverter to islanded (off-grid) mode within 3 seconds, ensuring uninterrupted power supply to essential single-phase loads. Once the grid is restored, the system seamlessly returns to normal operation.

**Specifications:**

**Model**: Backup Box-B1

**Function**: Automatic backup power switch for three-phase Huawei inverters

**Compatible Inverters**: Huawei SUN2000-3/4/5/6/8/10KTL-M1

**Compatible Battery**: Huawei LUNA2000 series

### AC Input (Grid)

**Connection**: Three-phase

**Rated Voltage**: 380 V / 400 V

**Frequency**: 50 Hz / 60 Hz

**Voltage Range**: 342 V – 440 V

### AC Output (Backup)

**Connection**: Single-phase

**Rated Voltage**: 220 V / 230 V

**Frequency**: 50 Hz / 60 Hz

**Maximum Apparent Power**: 3.3 kVA

**Maximum Output Current**: 15.2 A

**Switchover Time**: < 3 seconds

### General Data

**Operating Temperature Range**: –20°C to +45°C

**Relative Humidity**: 0% to 100%

**Protection Degree**: IP65

**Dimensions (W × H × D)**: 400 mm × 350 mm × 130 mm

**Weight**: 11 kg

## Specifications

| Spec | Value |
| --- | --- |
| Phase type | three-phase |
| Inverter type | hybrid |