Hydrogen-powered cars, like Honda's FCX Clarity, face a lot of hurdles, not the least of which being a fuel source requiring more energy to produce than it in turn gives out as energy. Honda is showing one way to mitigate that with its conceptual home-based recharging station. It relies on a six-kilowatt solar array to power an electrolyzer, splitting water molecules into hydrogen atoms. Eight hours of sunlight generates a half-kilogram of hydrogen, enough for the FCX to cover about 30 mile……

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