As the name suggests “Energy Efficient” that means a motor which consume low power and gives the same output as the normal motor give and in some cases, the output of energy-efficient motor can be expected even more than that of a normal one.
But Some times due to some foreign problems the motors won't able to work at its top-most efficiency, which needs to be solved and precisely rectified in order to conserve energy efficiently and to ensure that the outsurge of energy is normal.