A backup power distribution box serves as a critical component in ensuring continuous power supply for various applications. When the grid fails, the inverter switches to the off-grid state and supplies power to off-grid loads in backup mode. When the grid recovers, the. The SolaX X1 and X3 EPS Boxes are designed for easy integration with single-phase and three-phase inverters. It is a vital part and central hub of any electrical system. The unit. A distribution box is a low-voltage electrical enclosure that receives incoming power and distributes it safely to multiple outgoing circuits through protective and switching devices such as MCBs, RCDs, RCBOs, fuses, isolators, busbars, neutral bars, earth bars, and surge protective devices.