Eaton’s Energy Saver System (ESS) improves efficiency levels to 99 per cent. It does this by suspending the power modules when power conditioning is not required and by enabling the inverters to start switching within just 2 milliseconds, when needed. ESS is the most advanced, proven and reliable energy-saving system on the market with many years of usage and a wide install base. When compared to extremely high double-conversion efficiency, the ESS mode can still reduce the losses by 75 per cent with a typical UPS load.