Porvair plc, a UK-based company, has a division focused on filtration and fluid management technologies. While their website prominently features their work in various sectors including life sciences and industrial applications, there is no specific mention of a separate entity or division called "Porvair Fuel Cell Technology" focused solely on alternative energy solutions within the United States or elsewhere. Therefore, a detailed writeup on such a company cannot be provided based on the available public information from the Porvair website. The provided URL does not contain information supporting the existence of a company with that name and specific function.