Highly efficient, three-phase UPS with modern functions, excellent specs and durable electrical equipment, serial RS232, RS485 and USB interfaces, dry contacts, 3 x internal battery string (1 x empty battery slots), SNMP network card for simple monitoring and administration on Windows available separately. Runtime at 40 kW: approx. 5.2 min Runtime at 30 kW: approx. 8.4 min Runtime at 20 kW: approx. 15 min Please note: Important: the UPS must be connected by a professional! Optional monitoring and administration of the UPS only possible on Windows!