APC by Schneider Electric Smart- SMX2200RMLVUS 22kVA Tower/Rack Mountab

Adjustable voltage sensitivity - Provides the ability to adapt the UPS for optimal performance in specific power environments or generator applications.
Adjustable voltage-transfer points - Maximizes useful battery life by widening the input voltage window or tightening the output voltage regulation.
Audible alarms - Provides notification of changing utility power and UPS power conditions
Auto recognition of external batteries - UPS recognizes when external battery packs are attached and automatically adjusts runtime.
Automatic restart of loads after UPS shutdown - Automatically starts up the connected equipment upon the return of utility power.
Automatic self-test - Periodic battery self-test ensures early detection of a battery that needs to be replaced.
Battery failure notification - Provides early-warning fault analysis on batteries enabling timely preventive maintenance
Boost and Trim Automatic Voltage Regulation (AVR) - Gives higher application availability by correcting low and high voltage conditions without using the battery (not available on all models).
Cold-start capable - Provides temporary battery power when the utility power is out.
Disconnected battery notification - Warns when a battery is not available to provide backup power.