An uninterruptible power supply, also uninterruptible power source, UPS or battery/flywheel backup, is an electrical apparatus that provides emergency power to a load when the input power source, typically mains power, fails. A UPS differs from an auxiliary or emergency power system or standby generator in that it will provide near-instantaneous protection from input power interruptions, by supplying energy stored in batteries or a flywheel. The on-battery runtime of most uninterruptible power sources is relatively short (only a few minutes) but sufficient to start a standby power source or properly shut down the protected equipment.

is a global provider of power quality solutions designed to increase the availability and uptime of mission-critical applications or processes, from a simple desktop PC to a large Internet Data Center or industrial manufacturing plant. EPI has been investing in the research and development labs where, every year, new systems are designed in co-operation with the final users and manufacturers of other electronic and electrical equipment.Furthermore the development of our structure and sales dept. has contributed to consolidate the experience reached over the years. The wide range of products (up to 1,000kVA) with single or parallel configurations (up to 6MVA) can satisfy most of the different requests. EPI qualified technicians can give all the technical support before and after sales, necessary to be competitive in a high-tech market. Using advanced systems, EPI guarantees the conformity of its products to the most restrictive European standards.