The Liebert® APS is a modular online double-conversion UPS, scalable from 5 to 20kVA N+1 and provides mission-critical availability and reduces costs while maintaining future flexibility. Pay as you grow design of the Liebert APS simplifies the capacity planning process and provides budge flexibility. The fault-tolerance design of the Liebert APS and hot-swappable power and battery modules ensure your critical IT applications are always protected from power disruptions, fluctuations, and outages.