Tripp Lite offers a wide variety of complementary products that enhance the operation and manageability of its UPS systems. They offer a complete line of premium enclosures and open-frame racks to organize and secure rackmounted equipment, including UPS systems. Tripp Lite also offers a complete line of cooling and airflow management products. All SmartOnline Single-Phase UPS systems accept optional external battery packs (available separately from Tripp Lite) for additional runtime. A complete line of power cables is also offered to accommodate a variety of equipment types. Tripp Lite offers a complete line of PDUs, available separately. Connect PDUs to UPS systems in a variety of configurations to: increase the number of UPS outlets, convert UPS outlets from high-amperage to low-amperage output or to allow users to hot-swap the UPS during maintenance without interrupting power to connected equipment. Using an Environmental Sensor (available separately from Tripp Lite) and an SNMP/Web card, managers can monitor external temperature/humidity and contact-closure (security and fire alarm) inputs. This is perfect for monitoring remote racks. Tripp Lite also offers 3- and 5-year extended UPS warranties as well as start-up and on-site service plans.