In IE3, IE4 and IE5 electric motors, price rises as the efficiency class increases; but this increase should be weighed together with energy savings. The balance between purchase cost and operating cost determines the right class.

Price Difference Between Classes

The initial investment is generally IE3 < IE4 < IE5. Energy consumption, however, falls in the opposite direction, so a higher-class motor produces lower electricity bills over time.

The Payback Logic

As the motor's daily running time increases, the savings of a higher efficiency class cover the price difference faster. IE4–IE5 suit 24/7 pumps and fans, while IE3 is economical for less-used applications.

Other Factors That Affect Price

Besides efficiency class, power (kW), speed, housing type (cast iron/aluminum) and mounting type also affect price. A firm price is therefore given by quote based on need.

DRG Motor for IE3-IE4-IE5 Pricing

Tell us the power, speed and efficiency class you need, and we provide a current price together with stock and lead time.