OUR T5 SERIES ONLINE PURE SINEWAVE UPS SYSTEMS FEATURE TRUE ON-LINE DOUBLE CONVERSION AND ZERO SEC. TRASFER TIME. INTELLECTUAL BLOCKING DESIGN, ADOPTS ADVANCED POWER APPARATUS IGBT, PREDOMINANTLY A SPWM INVERTER. ALSO INCLUDES MMBM INTELLECTUAL MULTI-MODES BATTERY MANAGEMENT AND INTELLECTUAL MONITORING AND MANAGEMENT SOFTWARE. THE PARALLEL CAPACITY CAN EXTEND THE ON-LINE PARALLEL REDUNDANCY OR N1+ FOR UPGRADEABILITY.