Solar relays are specialized relays designed for use in solar power systems, where they help control, protect, and manage the flow of electrical power generated by solar panels. They allow low-power control signals to safely switch higher voltages and currents commonly found in photovoltaic (PV) installations.

These relays are used for functions such as connecting and disconnecting solar panels, controlling inverters, managing battery charging, and providing protection against overloads or faults. Because solar systems operate outdoors or in demanding environments, solar relays are built to withstand high temperatures, voltage fluctuations, and long-term continuous operation.

Solar relays are commonly used in solar inverters, charge controllers, energy storage systems, and grid-tied or off-grid solar installations. In simple terms, solar relays help ensure safe, reliable, and efficient operation of solar power systems.