Sunburn on crops

I am really not sure if this is actually kind of a sunburn, but mainly the leaves of peas and beans are having some kind of trouble with the sun. I cannot move the two pots with peas on my balcony into shade, but I could do this with the beans. The peas got more or less devastated. They went all dry while the beans only have some parts of the leaves "burnt". No, it is not a pest, it can only be the sun. I have a similar situation in the garden: