Hydrogen Storage

• Electrolyzers can produce hydrogen at pressure, so a compressor is not needed.

Storage Tank Suppliers

• In-ground storage, 2200 PSI - 14"x40' - [1]
• Low, medium, and high pressure storage options - [2]
• Pictures of storage tanks - [3]

Cryogenic Storage

• Ultra High Density
• Can be done using a Delwar, a pure hydrogen gas source, and a cheap cryocooler
• A diy cryocooler could possibly be made to reduce costs further

Storage as a Synthesized Fuel

• Convert to Methane by the Sabatier Reaction
• That can be compressed/liquified as is or it could be further converted into other fuels
• Methanol can be made from methane via the following process Listed Here
• Dimethyl Ether can be made from Methanol This Details How
• Dimethyl Ether Can be Catalytically Converted to Hydrocarbons such as Gasoline This Details How
• Hydrogen + Carbon Monoxide can be directly converted to hydrocarbons via the Fischer Tropsch Process

Links

• This reports the cost of tanks at low-thousands scale for a car - [4]