Model Batteries have a poor reputation in UPS applications.
Many users experience poor reliability, even though they've performed extensive battery maintenance.
In the PureWave UPS System, the batteries are applied in such a way as to eliminate these problems. In a conventional on-line UPS system, the batteries are continuously connected to the energized dc bus, causing dissipation of electrolyte and prohibiting proper equalization charging. Battery maintenance requirements are increased and battery life is significantly shortened. But in the off-line PureWave UPS System, the batteries are connected to the energized bus only when the system is supplying power to the load. No battery maintenance is needed and battery life is increased.