Abstract: An exemplary electrolyzer includes an electrode plate assembly including a plurality of perforated electrode plates and electrically conductive busbars. The plurality of electrode plates includes one or more positive electrode plates interleaved with one or more negative electrode plates. Each electrode plate has a first aperture and a second aperture, the second aperture being larger than the first aperture and lined with a non-conductive grommet. The plurality of electrically conductive busbars includes a first positive conductive busbar and a first negative conductive busbar. Respective conductive busbars extend through the first aperture of corresponding positive and negative electrodes and through the non-conductive grommet of the second aperture of each corresponding negative and positive electrode.