Serbian math professor used beer cans in place of coper wire to make his own solar power heating system. via dailymail
With winter temperatures plummeting across Europe a Serbian maths professor has come up with a novel, not to mention economical, way of heating his house for free – by using empty beer cans to create a solar power heating system.
Darko Milicevic has turned the empties into solar panels which look set to save him as much as £500 a year on heating bills, which is almost twice the average salary in Serbia.
So far his invention for the beer can solar panels on the roof and radiators has cost the 39-year-old just £50.
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