Maintain uptime for servers, network gear, and mission-critical equipment with the Vertiv Liebert PSI5 lithium-ion UPS. This 1,500 VA, 1,350 W unit combines rack/tower flexibility with lithium-ion battery technology designed for long service life and reduced maintenance compared with traditional battery systems. Automatic voltage regulation helps stabilize incoming power across a 75 V AC to 146 V AC input range, while the sine-wave output supports sensitive electronics that demand clean power. For teams managing distributed infrastructure, the included RDU120 card adds remote monitoring and control capabilities that help reduce response time when conditions change. The UPS also includes hot-swappable batteries, RJ-11 dataline protection, an EPO port, and EMI/RFI noise filtering for a more complete layer of protection around connected equipment. With 8 minutes of runtime at full load and 18 minutes at half load, it provides enough time for orderly shutdowns or generator transfer. This model is a strong fit where uptime, manageability, and lower battery maintenance matter more than entry-level price. It is built for environments that need dependable power protection without sacrificing rack space or operational visibility.