Nuvera Fuel Cells has sold nine proton exchange membrane (PEM) fuel cell stacks to Centro Ricerche Fiat (CRF), a major Italian research organisation of the Fiat Group divisions. The sale follows the successful demonstration of the Fiat 600 Elettra Fuel Cell Vehicle, called "Seicento Elettra H2," which uses a Nuvera stack to generate on-board power from hydrogen.