Test results from the 5(th) generation SOFC stacks developed at Forschungszentrum Julich, the so-called E-design stacks, are presented. Reported are 5 kW,l gross power operating on methane, long term testing up to 4000 hours and thermal cycling capabilities. The 6(th) generation F-design is introduced with basically the same configuration, but reduced manufacturing effort and costs and improved reproducibility.