How will your “Hydrogen Leaf Cars” work when its very overcast and not sunny, which is alot in England so will it only

Question: How will your "Hydrogen Leaf Cars" work when its very overcast and not sunny, which is alot in England so will it only be used in very sunny places, e.g. North Africa.
- Keywords:
  artificial leaf,
  car weather,
  hydrogen,
  sunny
Asked by 11gorad1 to Stuart on 20 Jun 2013. This question was also asked by 0shobden.
- Stuart Archer answered on 20 Jun 2013:
  
  That’s a very good question! One of the advantages of the artificial leaf is that they will still work when it’s overcast, just not as quickly as in direct sunlight. They aren’t actually attached to the cars – they would have to be arranged in large sets of panels (a bit like solar panels), and the hydrogen they generate collected and transported to a hydrogen filling station, where you would fill up with hydrogen in the same way you fill up with petrol!

Question: How will your "Hydrogen Leaf Cars" work when its very overcast and not sunny, which is alot in England so will it only be used in very sunny places, e.g. North Africa.