Felix Kruse is Co-Founder and CTO at Rebaba, a Stockholm-based cleantech startup pioneering circular battery energy storage systems by giving retired EV batteries a second life.

Felix studied engineering at the Faculty of Engineering at Lund University and gained hands-on industry experience at Northvolt, where he identified the critical gap between retired EV batteries and the growing global demand for stationary energy storage.

Felix won the KPMG Global Tech Innovator (GTI) 2025 competition, earning Rebaba a feature on the Nasdaq sign at Times Square, and has designed a platform that enables any technician anywhere in the world to build a Rebaba system.

Prior to Rebaba, Felix held roles at Northvolt and Nova, building deep expertise in battery technology, infrastructure development, and the startup ecosystem that now underpins Rebaba's technical vision.

Rebaba closed a $4.6M oversubscribed seed round led by Sistafund and EIT Urban Mobility, operates commercial deployments across Sweden, and is expanding its CircularHub production facility in Stockholm to 40 MWh annual capacity as it enters broader European markets.