Stellaris makes window inserts that turn any building — from city skyscrapers to your own home — into a power plant.

Simply place the insert in an existing window, and its proprietary technology begins 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. And it was awarded Architectural Record Product of the Year in 2024. The company is generating minimal revenues but aims to scale with this round of funding.

Team Background

Jim Paull - Chief Executive Officer

Jack McCaffrey - Head of Manufacturing