What does 24 vac out mean on a sprinkler control box?

"24 VAC out" on a sprinkler control box indicates that the box outputs a 24-volt alternating current (VAC) signal. This voltage is typically used to power the solenoids in sprinkler valves, allowing the control system to activate and deactivate the watering zones. It ensures that the sprinkler system operates efficiently and can be controlled remotely by the timer or controller.