Clarity of Glass, page-8

I wouldn't worry about things like are they looking at batteries etc...these are clever people - they invented the glass remember.when you have a product or idea, numerous other ideas and applications are constantly presenting themselves. where alot of people go wrong is trying to take on too much too soon and not perfect the concept that started it all. The battery questions will probably be answered through the greenhouse development - as they will be operating through the night as well.