World’s First Closed SunCell: Batch, hydrogen-inventory-limited testing with predominantly noble gas with some hydrogen having a total pressure slightly over atmospheric. Engineering and low power testing successful. Ignition with higher H2 inventory resulted in a power surge. The World’s First Closed SunCell is no more. Subsequent slow motion (0.25 real time) videos are of sequential runs of the World’s Second Closed SunCell that was tested with limited, reduced hydrogen inventories. View the video directly on YouTube or on our Videos page.