| Photovoltaic or solar collector
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Best of all 100% of the roof surface with photovoltaik and 100% with Sonenkollektoren. This goes by a new technology which unites both functions in the same surface perfectly.
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| Electric power and heat of wood
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The oil price is rising, Peak oil dreaded by the economy gets closer. Which role can play wood in the future of our mobility and energy supply?
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| Intersolar fair 2005 in Freiburg
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Fair report from Intersolar 2005 in Freiburg. In 3 parts. fair in general, only about Photovoltaikand special part solar power for Africa.
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| Solar energy for a better life in Africa
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On Intersolar 2005, Solar compact showed affordable solutions for all people without public electricity net and almost without money.
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Car + traffic 
