This power supply, for water electrolysis hydrogen production, delivers DC current to split water molecules into H₂ and O₂ in electrolyte cells—an efficient approach. Used in new energy, steel, and chemicals, it has full-bridge phase-shifted soft switching (low EMI), PWM conversion (fast response), CV/CC modes, >0.99 PF, >95% efficiency, full protections, 300-430 VAC input, easy maintenance, and enables unmanned management.