energy upgrades & retrofits

Electric Supply Company is an electrical contractor based in Sioux Falls, SD, serving Sioux Falls, Harrisburg, Tea, Brandon and the surrounding area. In business since 1923, the company provides electrical contracting services including pre-construction and design, new construction, remodeling, service and repair work, and 24/7 service. It serves industries such as healthcare, tech/data centers, manufacturing, financial/office buildings, retail, churches, education and multifamily residential.

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24/7 serviceautomation/panel shopboom truck servicescommunications & specialty systemsDirectional boringelectrical contractinghigh voltage systemsinfrared thermographylighting controlsnew constructionpower quality studiespre-construction & designremodelingsolar power installations