Each lamp comes with its own self contained Solar Panel. These Panels are self contained, with an on/off switch to save you usage when you don’t want it. 12 hours of Sunlight will give you 20+ hours of the equivalent of 40W + ofLED light. There are no wires to the battery to store the Solar Energy. The Battery pack is in the panel. There are No wires or Cords. Move your lamp anywhere in your yard, patio or deck. The average Life ofour LED bulbs is 60,000 hours. The batteries will last 5 years. There is nothing like these State-of-the-art Portable SOLARS!!