Highly efficient, three-phase UPS with modern functions, excellent specs and durable electrical equipment, serial RS232, RS485 and USB interfaces, dry contacts, 2 x internal battery string (2 x empty battery slots), SNMP network card for simple monitoring and administration on Windows available separately. Runtime at 27 kW: approx. 5.1 min Runtime at 21 kW: approx. 7.8 min Runtime at 15 kW: approx. 12.5 min Please note: Important: the UPS must be connected by a professional! Optional monitoring and administration of the UPS only possible on Windows!