Rechargeable Solar Battery Wands are another way to power your existing 12V DC battery shade system.  This brand new Solar Powered NiMh (Nickel Metal Hydride) rechargeable battery wand is made by Somfy Systems.  It is designed to eliminate the use of Alkaline or Lithium batteries by using a single NiMh rechargeable battery that comes with the unit.  The small solar panel attaches to the window with sticky tabs and charges the attached NiMh battery.