ICA UPS SIN-1500C Capacity 2500VA/1625W, Because the UPS is the true on-line system, conditioned power is provided continuously to the attached load. The UPS constantly regulates and filter the AC input voltage and supply a clean and stable AC voltage to the output and charge the batteries. When the AC input voltage low or loss, the UPS protects the load instantaneously and supply a stable AC voltage without any transfer time.