> Even if it was possible to have completely free hydrogen (and it’s not possible) the compression cost would lower the efficiency to something around 60% That

> Even if it was possible to have completely free hydrogen (and it’s not possible) the compression cost would lower the efficiency to something around 60% That's pretty much irrelevant. Hydrogen is used as an energy store. Thus the whole point is to generate it where it's cheap to generate, and afterwards transport it to customers willing to pay for it. Therefore conversion effixiency is irrelecant and the key factor is market price, whose lower bound is dictated by the combination of production cost and how much it costs to transport it. To illustrate how irrelevant conversion efficiency is, keep in mind that right now both Morocco and Australia are investing in Hydrogen export. If I recall > if I remember correctly. Adding to that the storage tank cost and the far bigger explosion potential compared to batteries its supposed advantage is dwindling fast given the continuous improvement in batteries. You're already describing how natural gas is used. Not only are there large natural gas storage tanks in residential neighborhoods but also there are plenty of major cities throughout the world where natural gas is piped straight into apartment buildings.