The difference in energy consumption between devices operating at 230 volts and 240 volts is often negligible in practical applications. Electrical devices are designed to operate within a certain voltage range, and both 230V and 240V typically fall within that acceptable range. Therefore, the specific voltage within that small range has minimal impact on the amount of electricity consumed by the device.
Factors such as appliance efficiency, usage patterns, and the overall electrical load of a building have a much greater influence on electricity bills. Historically, electrical distribution systems have varied slightly in their delivered voltage. While nominal standards exist, actual voltages can fluctuate due to grid conditions and proximity to transformers. Consequently, equipment designed to work with either voltage ensures compatibility across diverse electrical infrastructures.