The period witnessed a shift toward hybrid in-space power architectures that blend solar energy generation, wireless power transfer concepts, and non-solar options like nuclear power to meet longer mission durations. Emphasis on energy efficiency and advanced power management, including high-performance MPPT and radiation-tolerant system components, underpinned research methodologies ranging from system-level modeling to feasibility studies and early regulatory considerations. The field pursued cross-cutting standards, roadmaps, and multi-source integration strategies to unify diverse energy technologies for space deployment.