One bar is equivalent to 100kPa and is commonly used to measure atmospheric pressure as well as the pressure of gases in industrial processes. The Solid State Storage system for Hydrogen operates at around 40 bar which is considered a fairly safe operating pressure. Hydrogen Gas is generally stored and very high pressures that range from 350-700 Bar in order to obtain the required amount of Hydrogen in a reasonable sized cylinder. High Pressure Hydrogen Storage comes with far greater level of complexity when it comes to safety and increased levels of expertise and cost associated with very high pressure Hydrogen compressors.
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