Marstek SmartBox DB63S – Single-phase backup box for emergency power

The Marstek SmartBox DB63S is an intelligent single-phase distribution box specifically designed for use with Marstek Venus series home battery systems. Thanks to its automatic switching between grid power and backup power, the SmartBox ensures a reliable electricity supply during power outages while providing full support for residential energy storage applications.

Key Features

• Suitable for single-phase 220V / 230V installations


• Supports up to 3 Venus units connected in parallel


• Provides whole-home backup power during grid outages


• Automatic switching between grid and battery power


• Manual bypass function for maintenance or replacement without interrupting the power supply


• Integrated surge protection


• Operates in both on-grid and off-grid modes


• Maximum pass-through and output current of 40A


• Switching time of less than 1 second


• Compact wall-mounted design with natural cooling


• Easy integration into existing electrical installations

Technical Specifications

• Model: Marstek SmartBox DB63S


• Grid Type: Single-phase


• Rated Voltage: 220V / 230V AC


• Frequency: 50Hz / 60Hz


• Maximum Pass-Through Load: 40A


• Maximum Output Current: 40A


• Maximum Connected Units: 3 units


• Protection Rating: IP20


• Operating Temperature: -5°C to +70°C


• Dimensions: 480 × 360 × 118 mm


• Weight: Approximately 11 kg


• Cooling: Natural convection

Why Choose the Marstek SmartBox DB63S?

The Marstek SmartBox DB63S transforms a home battery installation into a complete whole-home energy backup solution. Its intelligent switching capabilities, high load capacity, and support for multiple energy storage units make this SmartBox an ideal choice for households seeking maximum energy security, increased self-consumption, and greater independence from the utility grid.