Solon AG has just produced a movie style commercial which I have to say is very watchable and very original.

Take a look at it here . . . click on "skip intro" then "watch the movie" - you need the sound on too.

I don't want to spoil things, but I do think their calculations involving 1.5 volt batteries are more than slightly out . . . such a battery should give you 3.75 watt hours. On average around the world throughout the year, let's say you get solar radiation of 1300 watts per square metre (or at least the hotter parts of the world). That should correspond to about 347 1.5 volt batteries - at that level of solar radiation, falling on the hour per square metre, for each hour. Also solar pv efficieny of around 15% means that only 52 of these batteries will get used.

So when you've seen the movie, perhaps you'll agree it's not quite what they portray, but you have to forgive their dramatic license !