Why cant an electric hydrogen & O2 generator be installed in homes to refuel cars?

I am trying to put together a system to use the electricity from my existing 2 kilowatt wind turbine in to hydrogen and oxygen. I can use the compressed liquefied hydrogen to power my cars with minimum modification so if I travel far I can use gas from a station. According to my calculations a 10 gallon tank of compressed liquefied hydrogen is equivalent to at least 18 gallons of gasoline. I am not sure what to do with the O2 that is left over I can either sell it or send it up in a hydrogen balloon to be converted in to Ozone in the upper atmosphere.