or oil for heating. in theory you would need at least one for every bedroom you have. and if you don't have an expensive battery to store any surplus energy as it is captured, you end up feeding it back to the grid for a fraction of the market price. one alternative is you can plug the arc directly into your electric car if you have one. i found another solo entrepreneur in london's notting hill. this prototype features a unique cost—effective way to attach solar film to regular blinds so owners of flats and garages can take advantage too. because to date solar power has been for the rich, and it has not been, there has not been a system or product in place where it can go on any building. my company's aim is all around the democratisation of solar so any window can now become a solar panel. david has applied for a patent for his creation and will take it first to spain where these