HELBIO, Hydrogen & Energy Production Systems S.A. signed an agreement with the Municipal Agency for Water and Sewage of Patras ( Greece ) for the construction and installation of a unit generating electricity and heat from biogas. The unit will convert biogas to hydrogen which will be fed into a fuel cell producing electricity with high efficiency and zero pollutant emissions. The unit will be in operation in June 2008 and will be of 20kW electrical and 20kW thermal capacity (more details).