The HUAWEI Backup BOX-B1 is designed for 3-phase M1 inverters, offering a maximum power of 3.3kVA. This device is essential for PV system installations, providing control over grid-tied and off-grid operation of the three-phase inverter. In case of a grid failure, the inverter seamlessly switches to off-grid mode, ensuring continuous power supply to critical loads not connected to the utility grid in backup power mode. Once the grid issue is resolved, the inverter switches back to grid-connected mode. The Backup Box supports various network configurations: TN-S, TN-C-S, and TT. For outdoor installations, it is recommended to shield the device from direct sunlight exposure to enhance durability.

Technical Specifications:

• Automatic Power Source Switching: Yes (in case of grid voltage loss/return)
• Max Current: 15.2A
• Phase Compatibility: 3-phase installations
• Compatible with Huawei 3-phase Inverters: SUN2000-3KTL-M1; SUN2000-4KTL-M1; SUN2000-5KTL-M1; SUN2000-6KTL-M1; SUN2000-8KTL-M1; SUN2000-10KTL-M1
• Mounting: Wall-mounted
• IP Rating: IP-65