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Limitations of Commercial UPS Equipment

The industry is driven by lowest cost. Users normally don't care about power quality. Users really care about saving data which means that they are satisfied with orderly shut down to protect data files. Most UPS do not have quality battery chargers. It reduces the battery life drastically. Most UPS equipment does not provide real power conditioning (there are exceptions). Some UPS equipment is poorly protected against surge voltages. Extended back-up requires the addition of expensive rectifier/chargers and battery packs.