Established in 1920, Electrical Engineering Company known as 3E, is an industry leader with diverse capabilities. We are a group of related businesses working together to enhance service to the electrical industry.

Business Support Solutions
Electrical Supplies & Services
Power Distribution & Energy Management
Commercial Lighting & Control
Industrial Supplies
ITS / Information Technology Systems
Electrical Apparatus Repair
Control Panels / Value Add Service
Custom Steel Fabrication & Equipment



We are an award-winning, exclusive Kohler Generator distributor,
offering a complete range of power generation equipment including:

  • Standby and Prime Power

  • Mobile

  • Commercial and Residential

  • Single Phase and Three Phase

  • Automatic Transfer Switches

  • Paralleling Equipment

  • Load Bank Testing

  • Custom Sound Enclosures

  • 10kW to 3.25 MW

  • Rentals


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With full manufacturing and electrical repair capabilities servicing Iowa, Nebraska and South Dakota, we are able to do more than most generator distributors. Our certified generator technicians are on call 24/7. We are your “one stop” shop when it comes to electrical equipment and generator support.


ResidentialGenerator1.gif3E Service Centers carry a full line of rental equipment including trailer mounted generator sets, transfer switches, load banks and all related rental accessories. When electrical power is not available due to scheduled or unscheduled maintenance or when power is required in an area where power is not usually available, our knowledgeable staff will supply the best rental equipment to meet your needs.

Statistics Reinforce Your Solutions & Provide Credibility

Our employee-owners are empowered to give it everything we've got to bolster your bottom line.

Ideas Generate Innovation

Custom wire and cable solutions, online ordering, drive-through service and more.

Orders are promises

Same-day delivery, 800+ brands, and best-in-class fulfillment.

Expertise is essential

On-call technical troubleshooting and six dedicated teams of product specialists.

Gratitude gives back

Volunteering and providing financial support to our communities.

Latest News

Learn about our recent projects, best practices, newest products, latest news and more.

Don't Take Our Word For It

Testimonials are a powerful selling tool. Ask some of your better known affiliations to share a few words about how you've made their lives easier.

"What A Wonderful Team To Rely On"

Ned Plimpton, Belafonte Co.

I'm continually blown away by the team at Symphony. They rock! I would come back again and again.

"Produced With Perfection In Mind"

Walter Sobchak, Rug Collector LLC

I don't know what I would do without Symphony. My happiness has gone through the roof :)

"This Product Blew Me Away"

Lucille Bluth, Real Estate Inc. Group

My expectations were exceeded beyond belief.  The product was wonderful and it asnwered all my problems!