There is no universal controller that can work at both 110V and 220V.
The internal components of these two types of controllers differ significantly in their design and functionality. Each controller is built with specific parts tailored to its intended use, which results in variations in performance and power requirements.
Specifically, the 110V G30 model consumes 1600 watts of power. This is because the heating element within the boiler is designed to operate at 110 volts and has a power rating of 1600 watts. The electrical specifications of the heating element directly influence the overall power consumption of the controller.