Right, but that's all structure and doesn't (er, shouldn't) fundamentally affect the cost of the PV cells themselves. Regardless, I agree that it's not necessar

Right, but that's all structure and doesn't (er, shouldn't) fundamentally affect the cost of the PV cells themselves. Regardless, I agree that it's not necessarily the most cost-effective choice, I just don't think that it's a response to some perceived lack of space either.