NOVELTY - The electrode group comprises a first electrode assembly comprising a first electrode (130a), a second electrode (140a), a third electrode, a first conductor in electrical communication between the second electrode and third electrode and a first electrical insulator (150a) positioned between the second electrode and the third electrode, a second electrode assembly comprising a fourth electrode (130b), a fifth electrode (130c), a sixth electrode, a second conductor in electrical communication between the fourth electrode and the fifth electrode and a second electrical insulator (150b).    USE - The electrode group is useful in a system for generating hydrogen, which is useful in a vehicle such as ship comprising wheels and an engine such as a diesel fuel engine and a hybrid fuel engine (all claimed).    ADVANTAGE - The electrode group ensures energy-efficient generation of hydrogen when is applied as an electrolytic cell in the hydrogen generation system, and minimizes or prevents the conduction of electricity through the space between the anode and cathode.    DETAILED DESCRIPTION - The electrode group comprises a first electrode assembly comprising a first electrode (130a), a second electrode (140a), a third electrode, a first conductor in electrical communication between the second electrode and third electrode and a first electrical insulator (150a) positioned between the second electrode and the third electrode, a second electrode assembly comprising a fourth electrode (130b), a fifth electrode (130c), a sixth electrode, a second conductor in electrical communication between the fourth electrode and the fifth electrode and a second electrical insulator (150b) positioned between the fourth electrode and the fifth electrode. The first electrode is positioned spaced from and adjacent to the second electrode. The fifth electrode is positioned spaced from and adjacent to the sixth electrode. The third electrode is positioned spaced from and adjacent to the fourth electrode of 0.2-4 mm. The second electrode and third electrode are parallel. The first and second electrode assemblies are disposed diagonally to each other. The first and second insulators are 90% of the area relative to an adjacent electrode area. The electrical insulators consist of polymer, polymer composite, glass and/or ceramic. INDEPENDENT CLAIMS are included for:    (1) a hydrogen generator; and    (2) a method of generating hydrogen.    DESCRIPTION OF DRAWING(S) - The diagram shows a cross section view of an electrode assembly for a hydrogen generator.    First electrode (130a)    Fourth electrode (130b)    Fifth electrode (130c)    Second electrode (140a)    First insulator (150a)    Second insulator. (150b)