How is power supplied to a mini-split system?

In a mini-split system, power is typically supplied to the outdoor unit, which is responsible for providing the necessary electricity to the indoor units. The outdoor unit contains the compressor and other components that handle the refrigerant cycle and overall system operation. This setup allows the outdoor unit to convert electrical energy into mechanical energy to circulate the refrigerant, which then transfers heat between the indoor and outdoor environments.

From the outdoor unit, low-voltage control wires extend to each indoor unit. This connection provides the power needed for the indoor units to operate while relying on the outdoor unit for the main electrical supply. This design makes mini-split systems efficient as they can be installed without extensive ductwork and still effectively manage temperature control throughout different rooms.

The other choices do not accurately reflect how power is supplied to mini-split systems. Power is not typically supplied directly to each indoor unit, nor is it handled through a battery backup system or solely to the indoor unit. The outdoor unit serves as the primary source of power, ensuring proper functionality and coordination between the indoor and outdoor components.