The solar cells supplies in the kit usually have two terminals on the rear marked + and ? and can be connected in series just as you would do with cells to create higher output voltages. The motors included in the kit are generally 1.5-3V and can be replaced if needs be with similar miniature motors although some suppliers sell a special ?solar motor? which is better suited to these very low voltage/low current applications.

Many different kits are available nowadays including solar powered cars and robots, helicopters and boats. The kit described above is a low budget version of these kits comprising the most basic parts to show pupils the basic principles behind solar energy. Other examples of the uses of solar cells include solar powered radios, phone chargers and torches. Teachers may ask if you have examples of any of these to show students these principles in action. All can be purchased fairly inexpensively from lab suppliers and high street retailers.