The NS KING ST E PF1 series represents the latest generation of UPS PF1 in three-single-phase medium power transformer-less systems (VFI-SS-111). NS KING ST E provides the perfect solution for small to medium sized data centers, communication rooms, IT networks, and any mission critical application that requires high power and energy efficiency. NS KING ST E has a solution with integrated internal batteries from 10 to 20kW, reducing the footprint to a minimum. Available in three cabinet solutions, they are distinguished by the ability to contain a different number of batteries or accessories, such as an output isolation transformer, air filters on the front door or higher levels of IP protection.