The Silent Sentry uninterruptible power supply is a battery-operated, wall-mounted system. Its low-profile design can be mounted on or between wall studs with a protrusion of less than 4.5 inches. It can be installed in tight spaces, in utility closets, or behind doors. The hardwire series features a built-in sub-panel with branch-circuit protectors.

OnStat Power, Stamford, Conn.
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