Huawei SMARTGUARD-63A-T0 - three-phase backup box

It is not an inverter, but the device that sits between the grid meter and the house distribution board and decides how the energy flows. During a power cut, it takes over the supply of the whole home on all three phases, from the battery of the photovoltaic system. In normal operation, it coordinates the inverters, the battery, the car charging station and the heat pump, starting them in the order you set, so that you use as much as possible of your own energy.

Switching when the grid fails is done in at most 20 milliseconds in the MAP0 configuration (up to 100 ms in the M1/MB0 variants), fast enough for electronic appliances not to reset. The 63 A cover a usual three-phase household connection, and the outputs for the backup loads and for those that stay on the grid are separate, with a cumulated limit also of 63 A. There is a manual by-pass for emergency situations. Energy measurement has an accuracy of plus/minus 1%, so the reports in the app correctly reflect the consumption. The system can coordinate up to 14 SG-Ready heat pumps, two charging stations for electric cars and 20 Shelly devices. The box is 490 x 600 x 170 mm and 17 kg, with IP55 protection and silent cooling, without a fan, below 29 dB.

Working voltage 380/400/415 V, respectively 220/230/240 V per phase (L1/L2/L3/N+PE); 63 A maximum current on the grid, 63 A on the backup output and on the non-backup one (cumulated maximum 63 A), 60 A on the connection with the inverter. It supports riding through voltage dips (LVRT). It manages up to 3 inverters (MAP0) or 1 inverter (M1/MB0) plus LUNA2000 storage, two SCharger-7KS-S0 / 22KT-S0 stations, up to 14 SG-Ready heat pumps and 20 Shelly devices, with automatic prioritisation. Communication: LAN/WAN 10/100 Mbps (max. 100 m), WLAN 802.11 b/g/n AP mode, 2 x RS485 (max. 50 m), 2 DI + 2 DO. IP55 enclosure, natural convection, -25...+50 degrees C (derating above 30 degrees C on-grid and 40 degrees C off-grid), 5-95% RH non-condensing, maximum altitude 4.000 m (derating above 2.000 m). Declared compliance: IEC 61727, IEC 60068, IEC 61439, CE, UKCA, RCM.

Who it suits

Suitable for a house or villa with a three-phase connection, a Huawei SUN2000 system and a LUNA2000 battery, where full backup and automatic coordination of the large loads are wanted.

Terms explained

• LVRT: The ability to stay connected when the grid voltage drops briefly, instead of shutting down at the first fluctuation.
• Derating: The automatic reduction of power at high temperatures or at altitude, as protection of the internal components.
• Non-backup output: The circuits that stay powered only when the grid is present; the large loads are connected here, so that they do not empty the battery during an outage.

Technical specifications

Recommended applications

• Backup for the whole home in three-phase photovoltaic systems
• Three-phase Huawei SUN2000 residential systems with LUNA2000 storage
• Energy management and load prioritisation at household level
• Integration of SCharger EV charging stations and SG-Ready heat pumps

Technical details

Specifications confirmed from the manufacturer's datasheet

Huawei SmartGuard-63A-T0 is the three-phase backup box of the FusionSolar ecosystem. It is not an inverter, but the switching and energy management device installed between the grid metering point and the house distribution board, which provides backup for the whole house on three phases. It works at 380/400/415 V, respectively 220/230/240 V per phase (L1/L2/L3/N+PE), with 63 A maximum current on the grid, 63 A on the backup load output and on the non-backup one (cumulated ≤ 63 A) and 60 A on the connection with the inverter.

Switching when the grid fails is done in at most 20 ms in the MAP0 configuration, respectively at most 100 ms for the M1/MB0 variants, and the equipment supports riding through voltage dips (LVRT). It has a manual safety by-pass. The energy measurement accuracy is plus/minus 1% over the range up to 63 A.

It can manage up to 3 inverters (MAP0) or 1 inverter (M1/MB0) together with LUNA2000 storage, two SCharger-7KS-S0 / 22KT-S0 charging stations, up to 14 SG-Ready heat pumps and 20 Shelly devices, with automatic load prioritisation. Communication: LAN/WAN 10/100 Mbps (≤ 100 m), WLAN 802.11 b/g/n AP mode, 2 x RS485 (≤ 50 m), 2 DI + 2 DO. IP55 enclosure, natural convection, -25...+50 °C, max. altitude 4000 m. Compliance declared in the datasheet: IEC 61727, IEC 60068, IEC 61439, CE, UKCA, RCM.