It then comes on again keeping the battery at it's peak without boiling it. During the day I see the LED turn on and off regularly. I have the less time it's on. You select your controller by the amount of current your panel can generate. Arizona sun I guess.
Information is in the side bar.
Installing the controller couldn't be easier. You have 4 screw terminals, two for the panel and two for the battery. As I mentioned before, I have two panel meters connected to the system at all times. These are cheaper meters that require their own power source, and can't use the same battery it's measuring. I can't even share a battery between the two meters.