Provides early-warning fault analysis on batteries enabling timely preventive maintenance. ECO mode by-passes unused electrical components in good power conditions to achieve high operating efficiency without sacrificing protection. Green mode bypasses unused electrical components in good power conditions to achieve very high operating efficiency without sacrificing any protection. Text and mimic diagrams display modes of operation,system parameters and alarms. Protects the initial investment in the UPS when migrating from tower to rack-mount environment.