China has claimed to have made a breakthrough with medium voltage integrated DC power.
US Navy presentations indicate that medium voltage DC power distribution is the key to making affordable power for railguns and electromagnetic launchers.
China has not built a ship with integrated electrical propulsion system (IEPS). The US spent nearly $8 billion for each of three Zumwalt destroyers. The Zumwalt has complex integrated ppower using a high-voltage power distribution architecture.
China is planning to develop IEPS using a simpler medium-voltage DC architecture. This would have a single-voltage distribution bus. It would eliminate the need for complex power supply harmonic conditioning and filtering.