C3S LLC currently operates two flawlessly functioning, inhouse-developed and manufactured CubeSat satellites in low Earth orbit, with another satellite awaiting launch at the launch site, and three additional CubeSats under production. The company is not only engaged in the development of 3-16 unit-sized satellites but also participates in numerous large satellite projects. In addition to platform development, the company has achieved outstanding results in the field of energy distribution and control systems, whether it's about reliability, size reduction, or efficiency enhancement. The presentation will cover both the small and large satellite sectors within the space industry, as well as the dimensions of traditional space industry and New Space, through an example of a product development project.C3S, renowned for its expertise in traditional MOSFET-based power supplies, has ventured into new directions within the space industry through the GRASSHOPPER project. This initiative aims to develop an exceptionally efficient 750W Switching-Mode Power Supply (SMPS) employing GaN FETs and Zero-Voltage Switching technology.