2, due to quality problems EPS doesn’t break in the output circuit because of serious overload or short-circuit, causing EPS internal fault;

3, EPS fault or battery charging board has quality problems;

4, the output circuit is more than 120%-140% in the city to the overloading of electricity under normal circumstances, circuit breakers do not jump, EPS inverter can not switch power in the electrical outage

5, the operator frequently operates EPS mandatory start function, and battery depth of discharge is large ,, which damaged the battery;

6, EPS front-end devices without the installation of lightning in the thunderstorm season, and damage EPS;