ETA: Here's a closeup. The consensus in the Lilly family is that they are electric solar panels.

Yep, solar panels for electricity. We have the same on our roof. In Germany they are quite popular, as the government helps with the purchase with cheap loans. Within a few years you have your money back when you sell the electricity.Lilly wrote:You know, when we were there, I didn't notice that, but they sure look like it in the photo.
ETA: Here's a closeup. The consensus in the Lilly family is that they are electric solar panels.