The partners will test high current density operation with reference scale (144 cm2), industrial scale (>300 cm2), and next-generation (900 cm2) cells in single repeating units (SRU), short stacks of 15 cells, and 80 kW prototype systems, resulting in over 10,000 hours of SOEL operation. To provide comprehensive validation of the OUTFOX technology, two distinct 80 kW testing campaigns with two different stack configurations will be conducted at the Shell facilities in Amsterdam, Netherlands, with over 4,000 operating hours in total. This will offer crucial data for the design of a complete 100+ MW SOEL system, including the module configuration and all balance of plant requirements, in order to pave the way for a multi-MW demonstration after the project’s conclusion.