Use the Meade Instruments LXPS 18 50W Portable Solar Charger to charge their LXPS 18 Lithium Portable Power Supply when you take your astronomy to the next level and go off-grid and away from troublesome light pollution. Designed for portability, the charger consists of four separate 12.5W monocrystalline panels that are wired together to produce 50W of total peak power, that folds into a small package with a touch-fastener closure flap and convenient padded carry handle.