People here have claimed they have great margins on what they are selling here.
They do not have to manufacture them North America to avoid duties and to get on the tax-credit list, they only have to complete the final assembly. So, they could ship them semi-knocked-down, and assemble them there in low-cost facilities with little labor.
So, I'll stick by what I said: I can't speak to Europe, but if they are not selling them in the US is because they have not satisfied the safety and environmental requirements, testing and or certifications.
To be clear, I am not saying they do not meet the standards, but it takes a lot of time, effort, money and practice to get through testing.