Batteries including solar batteries; battery chargers; solar powered battery chargers; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; photoelectric cells; photovoltaic cells and arrays thereof; foldable solar arrays; portable solar arrays; solar arrays for military use; indoor solar devices, products and arrays; solar devices with sensors and transmitters; solar devices for photocatalysis and glazing control; inverters and other componentry for use in solar cell systems