Power Supply for Container Houses

The power supply configuration for container houses should be selected based on specific uses and equipment requirements. Common power supply types include mains power access, energy storage system power distribution, and dedicated power sockets, with attention also paid to electrical safety and standardized installation.

Mains Power Access and Distribution Systems

If a container house is connected to the mains power, an AC power distribution unit should be installed to introduce external power into the internal power supply circuit. The design of the distribution box should consider three-phase balance to ensure stable power supply and distribution to equipment such as air conditioners, lighting, and fans. For example, refrigerated containers typically require access to 380-volt three-phase power to meet the starting current requirements of the refrigeration unit, and the on-site power supply capacity should match the equipment power. For ordinary container houses using high-power appliances such as air conditioners and water heaters, sufficient load should also be reserved to avoid circuit overload.

Energy Storage Systems and Power Distribution Solutions

Some container houses use energy storage systems as independent power sources, with core components including battery packs, battery management systems (BMS), energy storage inverter systems, and distribution boxes. The battery packs store electrical energy, the BMS monitors battery status, and the inverter system converts direct current into alternating current for equipment use. Such systems are suitable for scenarios without mains power access, such as field operations or temporary events, but require regular battery maintenance and ensure inverter efficiency.

Dedicated Power Sockets and Safety Equipment

Container houses commonly use surface-mounted switch sockets, which are easy to install and maintain, and are made of flame-retardant PC materials that meet fire safety standards. Socket types include:

• US/Australian standard sockets: Such as GFCI leakage protection sockets and NEMA 5-20R sockets, suitable for international standard equipment, with leakage protection functions to prevent electric shock accidents.
• Air conditioner dedicated sockets: 16A three-hole sockets that support high-power appliances and require separate wiring.
• USB sockets: Provide charging interfaces for mobile phones, tablets, and other devices, with input voltages of 220V or 36V optional, and output ports available in 2-position and 4-position configurations.

In addition, the distribution box should be equipped with miniature circuit breakers (MCBs) and residual current circuit breakers (RCCBs) to protect against circuit overload and detect residual current, respectively, preventing electrical fires or personal injuries caused by leakage.

Electrical Safety and Standardized Installation

Electrical installation in container houses should follow standards to avoid unauthorized wiring. For example, concealed sockets require pre-embedded bottom boxes and conduits, making subsequent modifications difficult, while surface-mounted sockets offer more flexible wiring. At the same time, electrical circuits should be regularly inspected, especially in older houses, to prevent fires caused by circuit aging or poor contact. Case studies show that some container house fires are caused by electrical switch circuit faults igniting weeds, so outdoor distribution boxes should be waterproof and dustproof and kept away from flammable materials.