energy efficiency | iowa

Motors & Variable-Speed Drivesarrows

Take advantage of MidAmerican Energy’s rebate incentives for high-efficiency motors and variable-speed drives to help commercial, industrial and agriculture businesses with energy and bill savings.

If your system doesn’t always run at the same speed, neither should your motors, and adding flexibility to your production process can make a big difference in operational efficiency.

A variable-speed drive connected to your electric motor regulates the motor speed and torque of the motor-driven equipment to the process requirement, resulting in reduced energy consumption. Rebates are available for variable-speed drives installed on fans, pumps and blowers. Variable-speed drives that are integral to the equipment are not eligible for rebates separate from the equipment rebate.

Motor and variable-speed drive benefits
  • Reduced energy costs
  • Improved plant efficiency and load factor
  • Reduced maintenance costs
Additional variable-speed drive benefits
  • Ensured precise control of process flow and pressure
  • Bypass capability when required
Variable-Speed Drives
Rebates cannot exceed 70 percent of the installed cost (materials and reasonable labor). You will receive the lesser of the rebate amount or 70 percent of installed cost. View our variable-speed drives table.

Motors—Three-Phase Only
Rebates cannot exceed 70 percent of the installed cost (materials and reasonable labor). You will receive the lesser of the rebate amount or 70 percent of installed cost. View our motors table.

When should a motor be replaced?
Since electricity accounts for 95 percent of a motor’s lifetime cost, choosing the most efficient motor available is appropriate before or after a motor fails, and for new installations.

  • You must be a commercial or industrial business customer with facilities located in MidAmerican Energy Company’s Iowa service territory.
  • MidAmerican Energy Company must provide the primary electricity and/or natural gas to the equipment at the facility for which the rebate is being paid.
Motors Only:
  • Equipment installed as a replacement unit, retrofit or in new construction is eligible.
  • Incentives are available for Enhanced Ultra-Premium efficiency, 1 to 200 horsepower, three-phase general purpose motors. Enhanced Ultra-Premium efficiency motors are at least 1 NEMA efficiency band above EISA 2007.
  • Incentives for fractional horsepower motors are not available.
  • Motors for spare inventory are eligible for incentives.
  • Minimum 3,000 annual operating hours are required.
VSDs Only:
  • Minimum of 3,000 annual operating hours.
  • Must be for new installations or failed variable-speed drives with bypass capability only. Replacing a variable-speed drive prior to failure with a new variable-speed drive is ineligible for rebates.
  • Must control a system or process with a variable load such as fans, pumps or blowers.
  • Process must be automatically controlled; manual controls do not qualify.
  • Single-phase variable-speed drives do not qualify.
  • Installations where applicable code requires a variable-speed drive do not qualify.
  • Mechanical-type drives or gear boxes, Eddy Current drives and magnetic coupling drives do not qualify.
  • Variable-speed drives installed for soft starting do not qualify.
  • Variable-speed drives that are integral to chillers are not eligible for rebates separate from the chiller rebate.
  • Variable-speed drives that are purchased for spare inventory are ineligible for rebates.
How to apply for rebates
Complete the motors or variable-speed drives application in full and return it to MidAmerican Energy along with product specifications, dated invoices and installation date(s). Include a motor or variable-speed drive manufacturer’s specification sheet with efficiency ratings.

Once equipment is installed and operating (or if motors only are purchased for spare inventory), and your application is reviewed and approved by MidAmerican Energy, your incentive check will be issued. Allow 4-6 weeks for processing.

Call 800-894-9599 with questions.

For additional resources regarding motor systems management, visit See for a full MDM product list. For detailed motor efficiency information, visit For pumping system improvements, visit

Nonresidential Equipment Custom Systems
How do your custom equipment and systems qualify for rebates? Technology always is changing with new and innovative high-efficiency products. MidAmerican Energy encourages these innovations and will review your equipment or systems to determine if they qualify. Examples of projects that may qualify:
  • Lighting redesign
  • Premium-efficient motors >200 HP
  • Energy management systems
  • Boilers and furnaces >2.5 million Btuh input capacity
  • Direct-fired heating systems
  • Thermal energy storage
  • Variable air volume conversions
  • Heat-recovery systems
  • Process boiler, chiller and refrigeration improvements
  • Pumping system improvements
  • All custom systems must have a less-efficient alternative available for baseline comparison purposes.
  • Preapproval is required prior to purchase or installation. Projects must be completed within 12 months of preapproval. Complete this preapproval form.
  • Eligibility is based on the qualifying equipment or system’s energy savings, peak demand savings, usage profile and incremental cost.
  • Equipment must be new.
View the Custom Project Calculation and Industrial Partners bonus incentive calculation.

Call MidAmerican Energy at 800-318-8915 with questions about application procedures, qualifying projects, incentives or verification procedures.

Download Custom Systems Rebate Self-Verification Form


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