Vertiv Liebert EXS, Double-conversion (Online), 20 kVA, 20000 W, 96.2%, 99%, 3% Vertiv Liebert EXS. UPS topology: Double-conversion (Online), Output power capacity: 20 kVA, Output power: 20000 W. Battery capacity: 9 Ah, Typical backup time at full load: 11 min, Charging current: 13 A. Form factor: Rackmount/Tower, Product colour: Black. Width: 335 mm, Depth: 650 mm, Height: 1300 mm