Ernest “Charlie” Hasselbrink is the Chief Technology Officer at Caelux. He previously led Global Quality, Reliability R&D, and Performance R&D during his 9 years at Sunpower (now Maxeon Solar). A champion for reliability in the PV industry, he was a plenary speaker for Reliability at the IEEE 39th PV Specialists Conference (PVSC) and was Area Chair for Reliability for PVSC 42. Charlie’s career includes roles as VP Reliability and Quality at Mainspring Energy, and VP of Front-End Technology Development at Sila Nanotechnologies. Charlie has been a tenure-track professor of mechanical engineering at the University of Michigan (Ann Arbor), a post-doctoral researcher at Sandia National Labs, earned his Ph.D. from Stanford University and his B.S. in Mechanical Engineering from the University of Houston.