The increase of both energy demand and pollution makes essential the use of renewable energy. Green electricity production is one of numerous challenges of researches and the target is to obtain an economic clean energy with high performance and no emission of pollutants. Hydrogen fuel cell is an electrochemical process in which chemical energy is transformed into electrical energy. This reaction occurs by using hydrogen. A biological fuel cell is one of numerous types of fuel cell using living organisms to generate electricity. In a microbial fuel cell (MFC) the catalyst is the microorganisms and the most often bacteria. In plant microbial fuel cell (P-MFC), the rhizospheric microorganisms are the catalyst. Plants produce carbohydrates through photosynthesis and feed with rhizodeposits the rhizospheric microorganisms which generate electricity. This paper is a presentation of 2 P-MFC using two different plant species Arundo donax L. and Chlorophytum comosum L in the same experimental conditions. During 43 days we measured the electrical potential produced in Arundo donax-MFC and Chlorophytum comosum-MFC and we compare the 2 P-MFC system to evaluate plant species performances. Results show a different electrical potential for the two plants. The maximum tension registered for Arundo donax L. is +145.2 mV and for Chlorophytum comosum L. is +155.3 mV.