The world as a whole is struggling with the same problems, which can be summed up in one phrase: the energy crisis. It is important to highlight the fact that the microbial fuel cell, also known as an MFC, was developed with the intention of producing energy. This study investigated the impact of cathode types (Zn, AL, and Cu) and sizes (800, 520, and 260) mm3 on voltage, current, and power generation during 240 hours. The results indicated that the Zn cathode with a size of 800 mm3 achieved the maximum current and power density after 24 hours, which was (0.641 mA and 5.396 mW) respectively. While the same treatment reached the maximum voltage of 8.693 mV after 192 hours. The type of cathode is more effective than the size in electric current generation from the soil, with time, soil electricity is decreased but in different intensities. Although this MFC technology presents many advantages; it still needs to be used in combination with other processes to enhance power output.