Stellaris makes window inserts that turn any building — from city skyscrapers to your own home — into a power plant.
Place the insert in an existing window, and its proprietary technology starts generating solar power. Stellaris doesn’t aim to replace your windows — it aims to enhance them.
This is a huge opportunity. According to the International Energy Agency, buildings worldwide will need to get forty percent of their power by renewable-energy sources by 2030.
Stellaris’ insert is as powerful as a conventional solar panel. It was awarded Architectural Record Product of the Year in 2024. The company is planning to use this round of funding to scale its operations.