Hello, I was wondering if there was a controller that would stay on even when the power went out. I know there are controllers that have "memory", I looking for one that will work with, say, Rolling black out?
Just purchase a UPS (Uninterruptable Power Supply) and plug the controller into it. Same thing that keeps a computer going during a blackout, but for a longer time, since a controller will only be drawing 20 watts or so of power when a sprinkler zone is running.
I'm just curious as to why you're worried about rolling blackouts? Those only happen during peak hours on hot days and only last a couple of hours. You probably shouldn't be watering when it's 100 degrees out anyway. Your back up battery should be sufficient for rolling blackouts.