Sustain critical workloads when utility power drops with the Eaton Powerware PW9155. Built as a 12 kVA online UPS, it conditions incoming power continuously and delivers 240 V AC output for sensitive infrastructure that cannot tolerate interruption. The 32-battery configuration extends runtime, while the compact 3-high tower design helps preserve floor space in dense electrical and IT rooms. This model is designed for environments that need more than basic backup. The integrated transformer module supports deployment flexibility, and the customizable power distribution module can include a maintenance bypass switch for service continuity. That matters when you need to isolate the UPS without taking protected loads offline. With lead-acid, maintenance-free batteries and a documented 18-minute half-load runtime, the PW9155 is built to bridge real outages, not just short disturbances. It is a strong fit for corporate data rooms, healthcare systems, banking infrastructure, and industrial control environments where power quality and uptime directly affect operations.