Just place the swimming solar pump on the water surface and off it goes when the sun shines the pump starts pumping the water the water lily comes with 4 different nozzles the pump starts working straight away when the sun shines there is no battery storage technical details output solar module 18 w maximum jet height approx 40 cm dependant on which nozzle is used maximum pumping capacity 160 lh size diameter x height 300 x 95 mm weight 780 g please note protec