It would be best to start using your new Betta during the daytime when there is sunlight over the pool. Turn the unit ON by pushing the red power button once and then lower it into the pool. Be sure to watch your steps and maintain your balance when working by the poolside. The robot will start to operate and at the same time, the top solar panel will start charging the battery built-in. During the sunny days, the robot will work well into the night and get into SLEEP mode after the battery charge gets low and will then wake up and continue to operate by itself after sunrise the next day when the battery is charged up to the set level again.