What is the role of relays in an RV electrical system?

Relays play a crucial role in RV electrical systems by enabling the control of high current circuits with low current signals. This is especially important in recreational vehicles where the management of various electrical components—such as lights, motors, and appliances—requires the efficient handling of electrical loads.

When a low-current signal (often from a switch or control panel) is sent to the relay, it activates an electromagnet within the relay. This electromagnet then closes the contacts in the circuit associated with the higher current. As a result, the relay acts as a switch that can handle a higher electrical load while only requiring a smaller amount of electricity to operate. This separation between the low and high current circuits enhances safety and prevents damage to control devices.

In the context of the given scenario, the idea that relays are involved in increasing power output, providing backup power, or converting AC to DC is not their primary function. Instead, their key role is to enable control over larger loads in a safe and efficient manner, making the option focusing on controlling high current circuits with low current signals the most accurate representation of their purpose in an RV electrical system.