Marstek Single-phase Smart Box is a single-phase device designed to work with a home energy storage system, providing backup power and seamless switching between on-grid and off-grid operation. The solution is developed to enhance home energy security, improve user comfort, and optimise energy utilisation within the system. The Smart Box is compatible with energy storage systems such as Marstek Venus E 5.12 kWh AC 3.0, creating a consistent and efficient energy management system for single-phase installations.

The manufacturer highlights features such as whole-home backup, high durability, energy efficiency, compact design, and the possibility of parallel expansion up to 3 Venus units.

From a technical perspective, the Smart Box operates in single-phase systems at 220/230 V and 50/60 Hz. The maximum pass-through current is 40 A, and in backup mode the maximum output current also reaches 40 A. The switching time is 1 second, ensuring continuous power supply to selected circuits during grid outages. The device is compatible with Venus Series inverters.

The compact and lightweight design is also noteworthy. The enclosure dimensions are 480 × 360 × 118 mm, with a weight of 10 kg, IP20 protection rating, and natural cooling. The operating temperature range is from -5°C to +70°C, with relative humidity below 95% RH. The Smart Box supports both On-Grid and Off-Grid modes, making it an ideal solution for users seeking greater energy independence and protection against power outages.