The intermittance and the geographical distribution of solar energy require means of storing and transporting it to the user's place for which an ideal means of doing this is to split water in order to obtain hydrogen Hydrogen is a carbonfree fuel which oxydizes to water as combustion product. The generated water becomes, together with renewable primary energy for splitting it, a source of clean and abundant energy in a carbon-free, natural cycle Hydrogen is a fuel which can be transported over long distances and stored so that solar energy can be transported from energy rich countries over long distances in ships to Europe, stored underground or in containers and used in gaseous or liquid form in industry, households, power stations, motor cars and aviation Solar energy as primary energy is discussed, a special form of it, the cheapest and by now largely available hydropower, is stressed Techniques of hydrogen production, vectorisation and end use is discussed as well as safety aspects, costs and strategy for its implementation.
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