A rolled up solar panel
https://files.mastodon.green/media_attachments/files/110/914/866/333/185/401/original/e04d9d5146a3f9da.jpg
This solar panel is about 200 cm times 40 cm and 2 mm thick. Made by Heliatek. It's pretty neat. With glue on the back it's just a matter of pressing it onto the wall and plug it in.
Probably falls off 😅, unless it's superglue? 🤔
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