Prefabricated electrical house is a containerized modular power equipment room, prefabricated, wired and fully tested in factory. It accommodates switchgears, inverters, protection devices and monitoring systems. Adopts integrated fire protection, ventilation, temperature control, anti-corrosion and waterproof structure. Greatly cuts on-site construction time and civil engineering costs. Suitable for photovoltaic power plants, battery energy storage stations, industrial projects and remote power facilities. Support customized internal layout, size, insulation and environmental protection configurations for global renewable energy and power transmission projects.