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 (1 x empty battery slots), SNMP network card for simple monitoring and administration on Windows available separately. Runtime at 20 kW: approx. 8.4 min Runtime at 15 kW: approx. 12.5 min Runtime at 10 kW: approx. 22.5 min Please note: Important: the UPS must be connected by a professional! Optional monitoring and administration of the UPS only possible on Windows!