The GOS power system is tailored to the needs of CubeSats. Includes an autonomous lithium-ion battery charging regulator and a power distribution unit for efficient management of satellite resources. EPS has up to 6 solar arrays. Best performance is achieved with a combination of GOS solar array and battery pack. This system is fully compatible with the CubeSat kit specifications. In the absence of special computational power or redundancy requirements, GOS EPS replaces OBC and helps reduce overall mission costs.