QUOTE
The real problem with hydrogen is, it's not an energy source per se. You have to use energy for processes like electrolysis to generate it.
True, hydrogen is better viewed as an energy storage/transfer medium. Then again, gasoline and heating oil also fit that definition. They're stored solar energy when you get right down to it. When the electricity to produce hydrogen can be obtained from solar, wind, and other almost unlimited energy sources, efficiency isn't all that important. If efficiency is going to be made an issue, it's hard to find something that's less efficient than an internal combustion engine burning gasoline.
Compared to straight electricity, it would be cheaper to send hydrogen through pipelines than electric through wires over long distances. If the distribution lines included storage tanks, that would also solve the problem of storage for periods of heavy usage. With electric, that requires backup generators. I don't see why the existing natural gas pipelines couldn't be used for hydrogen, assuming they're in good shape of course. There are problems that need to be solved for hydrogen to be viable, but that can be said for all the alternatives.
There's a huge amount of solar energy hitting the roofs of residences, waiting to be collected. The same applies to the wind that's blowing over our homes, an incredible amount of power waiting to be harnessed. I live in one of the worst areas in the US for solar heating, northern Michigan. For much of the winter, it's cloudy because of the proximity of the great lakes. The average amount of sunshine for the month of December here is 67 hours total. January averages 86 hours of sunshine for the month. Even with the limited solar energy available here, my small solar greenhouse provides about 25% of my heating needs. By the same token, those 2 months are some of the best for wind power here. When one source isn't available, the other is often in abundant supply. Much of the time, the same weather elements that create the energy demand can supply it. When it's way too hot, solar energy is usually abundant. In winter storms, wind energy is available in large quantities. It doesn't get much more convenient than that. This is why a cooperative approach would be so important. When one source isn't available, another is. The hydrogen would be the energy collection, storage and distribution medium for many different energy sources. For a decentralized hydrogen to be viable, it must not be under the control of big oil. Big oil would not allow a cooperative with multiple energy sources because they wouldn't have total control over the supply, and the resulting prices. IMO, they need to be kept out of the picture. There are so many benefits to such a system, so many problems it helps to solve, that it would be worth whatever it costs to make it a reality. There's benefits I haven't listed, such as the production of pure water from burning hydrogen. How useful could that be in drought areas? If we wait for big oil to solve the energy problem, it'll never get solved and we'll lose the best places left on the planet, plus a large percentage of our food growing capacity.
Rick