description APC Smart-UPS On-Line Overview
For mission-critical environments like small data centers or medical facilities, the On-Line UPS is the gold standard. It provides double-conversion topology, meaning it constantly regenerates the power, offering the cleanest, most stable sine wave possible, completely isolating the connected equipment from utility fluctuations. While more expensive, this level of protection is unmatched for highly sensitive, continuous operations.
help APC Smart-UPS On-Line FAQ
What does double-conversion mean on an APC Smart-UPS On-Line?
The UPS continuously converts incoming AC power to DC and then regenerates clean AC for connected equipment. This isolates the load from many voltage fluctuations and produces no normal transfer delay when utility power fails.
How is Smart-UPS On-Line different from APC Smart-UPS line-interactive models?
A line-interactive Smart-UPS normally passes conditioned utility power through and switches to its inverter during an outage. Smart-UPS On-Line runs through the inverter continuously, offering stronger isolation at the cost of more heat, fan noise, and energy use.
Can external battery packs extend the runtime?
Many Smart-UPS On-Line models support compatible APC external battery packs, but pack compatibility is specific to the UPS family and voltage. Adding packs extends runtime rather than increasing the UPS's watt or VA capacity.
Will an APC Smart-UPS On-Line run quietly in an office?
Not necessarily, because its cooling fans commonly run during normal double-conversion operation. Rack and higher-capacity models are generally better placed in a server room than beside a quiet workstation.
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