This large solar-operated pump, (2) 10-watt panels, and battery backup kit comes with everything needed to set up an outdoor solar fountain. It features a flow rate of at 396 gallons of water per hour and a lift of up to 120" high when 1/2" tubing is connected to the pump. When the power button is on, the pump will run via solar energy when the panels are in direct sunlight. When the sun goes down the battery pack will operate the pump for up to 4 hours on a full charge. To use the battery in this continual use mode, simply press the [Power] button until the [on] indicator light turns on. This will run the pump via the battery until the battery runs out of power.