Vertiv backs all Vertiv Liebert PSI5 1kVA UPS AVR Line Interactive UPS 1U Rack Mount with two-year, full unit coverage, including the battery. The Vertiv no-hassle, advanced replacement warranty covers all shipping fees and includes next-day delivery, which ensures customers will receive their replacement UPS prior to returning their damaged unit with no questions asked. With extended 3-year warranty, your line interactive UPS tower gets the same coverage for an additional 3 years.