A gas storage electrochemical pressure generator and a dual gas storage electrochemical pressure generator are provided. The electrochemical pressure generator includes a power source, an electrochemical pressure generator, one or more gas storage vessels, and a hydraulic device. The electrochemical pressure generator is selectively connected to the power source, and the power source is configured to supply power to the electrochemical pressure generator in a
high pressure mode of operation to convert a
solid state
hydrogen or
oxygen within the electrochemical pressure generator to a
high pressure gas having a first pressure when connected to the electrochemical pressure generator. The one or more gas storage vessels are in fluid communication with the electrochemical pressure generator, and each gas storage vessel includes a first chamber and a second chamber arranged in series. The first chamber of each of the one or more gas storage vessels is in fluid communication with the electrochemical pressure generator and includes a first surface having a first area of a non-rigid partition element. The second chamber of each of the one or more gas storage vessels includes a second surface having a second area of a non-rigid partition element, the second surface being mechanically connected to the first surface by the non-rigid partition element to produce a second pressure. The hydraulic device is coupled to the second chamber and transmits the second pressure to a load.