Try Birmingham University UK as allegedly they have covered their roofs in solar panels. The electricity is used to split water into hydrogen and oxygen. The oxygen is sold as medical grade oxygen and the hydrogen is used to drive university cars around the campus. By the way a diesel engine will run on LPG if this is added to the intake air. Diesel oil is still needed to initiate combustion however. Full power cannot be obtained with LPG as it "crowds out" the air needed for combustion, nevertheless the possibility of obtaining power from methane, butane, propane, etc is not to be sneered at now that white (road legal) diesel fuel is £1.30 per litre on the motorway. Incidentally the £1.20 and £1.19 supermarket sellers seem to be permanently sold out, things are getting like a Mad Max movie!