This would be great if they can do more styles and not just terracotta. E.g. I own an "old" UK home that has a "normal" tiled roof, but as it is in a conservation area so any attempt at solar will be met with literal outrage. These would be great even if they are only 10% efficient - something is better than nothing and I have this big old roof sitting there and the whole thing could be one huge solar panel.

Where can I buy these that match UK 100-150 year old standard UK housing styles? I have my credit card ready.