2, EPS, UPS can provide two-way output power supply, UPS power supply is to ensure high quality, and is to choose inverter priority; while EPS is designed to ensure energy conservation, and is to choose electricity priority. Of course, both are different in the rectifier and charger and inverter design specification .

3,Because UPS is on-line use, it can timely alarm when things are getting wrong, and have electricity as back-up protection, users can grasp and eliminate the failures and troubles, There will not be greater losses caused by the accident. The EPS is the off-line use, is also the last power supply protection, thus the reliability of the design requirements is higher, It can not be simply interpreted as a back-up type UPS, otherwise, make the importance of EPS obliterated. If the EPS is in the city power failure, can not supply battery emergency power, then the EPS is illusory, the consequences will be disaster.

4, UPS power supply targets computer and network equipment, load property (input power factor) difference is was not significant, so the national standard stipulated that output power of UPS is 0.8. The EPS targets are the power supply security and fire safety, load the nature is inductive, and capacitive, and rectification-type non-linear load combination, the output power factor can not be set 0.8 (EPS GB will require their number) , and some of the load was operated after the electricity stop working , therefore the EPS must provide a great impact on currents, the output dynamic characteristics of EPS must be better, stronger anti-overload. Therefore, the various components of EPS and the indicators of the UPS technical design of the distribution is different.