Solar Panel 20 Watt  Aluminium Framed 20w Polycrystalline PV Solar Panel.       20w Solar Panel ideal for charging 70ah 12v or larger batteries and providing solar energy for outbuilding lighting systems.     A 4ah charge controller should be used with this panel when used for charging a 12v Battery/  Cell: 125mm?125mm Monocrystalline silicon cells  Cells Array for the panel: 4?9  £79.99