Standard green padmount electrical transformer in front of solar panels



Largest selection of new and reconditioned transformers in the US.

Products & Services


image of a Maddox substation transformer

Medium voltage Dry-type

Maddox medium voltage dry type electrical transformer


Green liquid filled padmounted transformer


One padmounted switchgear unit and two metal-enclosed switchgear units

Low voltage Dry-type

image of a low-voltage Maddox transformer

Maddox Industrial Transformer provides a full range of commercial- and industrial-grade transformers. With thousands of new and reconditioned units in stock, our transformers are ready to ship at a moment's notice.
And if we don't have what you need in stock, we can manufacture it for you with the shortest lead-times in the industry.
We also offer transformer rentals, perform maintenance and repair work, and buy surplus units.

Products & Services
picture of two technicians working in an open padmount cabinet
We do one thing, and we do it well.

We focus all of our expertise on a single line of products to give you the best service possible. From the very start, Maddox has specialized in industrial and commercial transformers and related equipment.

About Maddox
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"We ordered transformers to use for our industrial equipment applications due to market shortages for our standard stepdown transformers. Delivery was incredibly quick and products look and operate without issue. Priced very well in comparison to other outlets - very happy to utilize Maddox in the future for our continued needs."

Todd Griffieth, ops manager

"I have purchased dozens of Maddox transformers, both low voltage dry-types and large reconditioned medium voltage units. Always great service and quality builds, with faster than industry standard lead-times."

Eric Raybould, distributor

"Quick delivery with helpful friendly staff. Great service and highly recommended. A great company to work with on all your transformer needs."

Austin Spiegel, project manager