A transportable modular multi-appliance device comprises a container, a primary power source for producing AC power, a plurality of AC-powered functional modules, AC outlets, sensors, and a controller. The primary power source is inside the container, and the functional modules are removably mounted inside the container and removably electrically coupled to the primary power source to receive AC power therefrom. The AC outlets are also electrically coupled to the primary power source. The sensors detect conditions inside the container and associated with the functional modules, and the controller is coupled to the primary power source and to the sensors and configured to automatically control the primary power source and allocate the AC power among the functional modules and the AC outlets in response to inputs from the sensors.