This is interesting, its an idea that is being tried by Sainsbury's to make their stores greener. Under the scheme the checkout would be powered by energy which is created by the shoppers. Kinetic road plates will be installed at a new branch in Gloucester. The plates will generate energy when customers drive over them when entering and leaving the car park. The device will then convert enough energy to power the tills inside the store reducing the amount of energy taken from the National Grid. The devices are already being tried at distribution warehouses but this will be the first time they will be used at a supermarket. If the scheme is successful in Gloucester it could soon be put into place at more stores across the country.